all geared lathe machinehandling this machine. as the machine and accessories are constantly being...

ALL GEARED LATHE MACHINE

INSTRUCTION & SPARE PARTS MANUAL

GUJARAT LATHE MFG. CO. PVT. LTD. WORKS : NH-8B, OPP. FIELD MARSHALL HIGH SCHOOL, SHAPAR-360024, (DIST. RAJKOT)

Email: [email protected]

H.O. : 201-202,”KARMA STAMBH” , LBS MARG, VIKHROLI(W), MUMBAI – 400083 Email: [email protected]

MACHINE No. : MODEL : 2050/

MANUFACTURED BY:

GUJARAT LATHE MFG. CO. PVT. LTD.

WORKS: HEAD OFFICE:

NATIONAL HIGHWAY-8B, 201-202,”KARMA STAMBH”, OPPOSITE FIELD MARSHALL LBS MARG, VIKHROLI (W), HIGH SCHOOL, MUMBAI-400083 SHAPAR-360024, DIST. RAJKOT PHONE: (022) 67242000 PHONE: (02827) 252394 FAX : (022) 67242038 FAX : (02827) 252357 Email : [email protected] Email: [email protected] : [email protected]

PANTHER ALL GEARED LATHE MACHINE

MODEL – 2050

INSTRUCTION & SPARE PARTS MANUAL

SALES OFFICE:

BARODA BENGALURU CHENNAI STD: 0265 080 044 PHONE: 2641121/7551 25587728 25221245/46 FAX: 2647551 25594143 25221245

REVISION-01

PANTHERMODEL PAGE NO.

2050 01

P R E F AC E

This machine have been manufactured with a view to obtain the

highest degree of working accuracy and it has been thoroughly tested for the performance to confirm IS 11118-1984, IS 1878 (part-1) -1971 and Dr. Schlesinger’s code for "Testing Machine Tools."

The accuracy of the machine can be achieved and maintained only if

the instructions contained in this manual are starkly followed. The users of the machine are therefore, requested to get themselves acquainted with contents of the manual, before Installation, operation and maintenance of the machine. It is suggested that a copy of this manual be made available to the operation and maintenance staff on the shop floor, who will be directly handling this machine.

As the machine and accessories are constantly being improved this

manual may differ in detail with the machine supplied. At the time of ordering the spares, please mention the component

number as indicated in this manual and serial number of the machine, which is stamped on Right hand corner of the lathe machine bed.

Please Read Instruction Manual before Starting the Machine.

For easy reference and under standing, this manual is divided in to followings five different sections.

Section 1 Introduction Section 2 Installation Section 3 Operation Section 4 Settings, Maintenance and Trouble Shootings. Section 5 Assembly drawings and spare part list.

REVISION-01

PANTHERMODEL

PAGE NO.

2050 02

I N D E X

Sr. Section Description Page 1 Introduction 1.1 Machine specifications 4

1.2 Packing slip 6 1.3 List of accessories 7

1.3.1 Standard accessories 7

1.3.2 Optional accessories ( to be order along with machine ) 7

1.3.3 Optional accessories( Retro fitting possible) 8

1.3.4 List of change gears 8 1.4 Legend 9

2 Installation 2.1 Lifting of the machine 13 2.2 Unpacking and cleaning 13 2.3 Foundation 13

Foundation drawing 14 2.4 Leveling 16 2.5 Electric control diagram 17-A

2.5.1 Machine without electric panel 19 2.5.2 Machine with electric panel 19

2.6 Idle running of the machine 21 2.7 Lubrication 21

2.7.1 Lubrication through oil holes 22 2.7.2 Lubrication through oil nipple 22 2.7.3 Lubrication through oil cups 22 2.7.4 Apron 22 2.7.5 Lubrication chart 22

3 Operation 3.1 Safety 23 3.2 Do, Do not & Checks 24 3.3 Head stock 25

3.3.1 RPM chart 25 3.4 Norton gear box 26 3.5 End feed gears 26

3.5.1 Thread chart 4 TPI British/Metric 27 3.5.2 Mod./ DP chart 4 TPI (Optional) 28 3.5.3 British chart for 6 mm pitch screw 29

REVISION-01


2050 03

Sr. Section Description Page

3.5.4 Metric & Mod.chart 6 mm pitch screw 30

3.6 Thread dial indication 31 3.6.1 Special threads calculations 31 3.6.2 Feed calculation 32

3.7 Carriage 33 3.8 Apron 33 3.9 Tail stock 34

Least count of hand wheels 34 4 Settings

maintenance and trouble shootings

4.1 Head stock 35 4.1.1 Taper setting 35 4.1.2 Spindle setting 35 4.1.3 V-Belts setting 35

4.2 Lead screw 35 4.3 Carriage 36 4.4 Surface slide & Compound Slide 36 4.5 Tail stock 36 4.6 Tool post 36 4.7 Half nut 36 4.8 Trouble shootings and remedy 37

5 Assembly drawings and spare parts list

5.1 Structure assembly 40 5.2 Head stock assembly 42 5.3 End feed gear train 48 5.4 Norton gear box 50 5.5 Carriage, surface and compound 57 5.6 Apron 61 5.7 Tail stock 68 5.8 Switch shaft assembly (Optional) 71 5.9 Extra accessories 76

REVISION-01


2050 04

SECTION-1 INTRODUCTION

1.1 Machine specifications.

Type of bed. Gap bed. Width of bed. 325 mm Height of centre. 254 mm / 305 mm Swing over bed. 484 mm / 595 mm Swing over saddle. 360 mm / 460 mm Swing over cross slide. 292 mm / 395 mm Swing in gap. 800 mm / 900 mm Length of gap in front of faceplate. 200 mm. No. of spindle speed. 8 Spindle speed range. 30 to 1235 RPM. Taper in spindle sleeve. MT – 4 Spindle hollow. 52 mm Spindle nose detail. A2 size 6 No. of British threads. 40 Range of British threads. 2 to 60 TPI. No. of Metric threads. 20 Range of Metric threads. 0.5 to 15 mm Pitch. No. of DP threads. 40 Range of DP threads. 4 to 120 DP. No. of Module threads. 20 Range of Module threads. 0.25 to 7.5 mod. No. of feeds. 40 Range of Longitudinal feeds. 0.066 to 1.98 mm / rev. Range of Transverse feeds. 0.016 to 0.48 mm / rev. Lead screw. Ø38.1 mm × 4 TPI. Tail stock spindle diameter. Ø63.5 mm Taper in Tail stock spindle. MT – 4 Cross slide travel. 275 mm Compound slide travel. 140 mm Tail stock sleeve travel. 180 mm Tool shank size. 25 × 25 mm.

REVISION-01


2050 05

2050/1 2050/2 2050/3 2050/4 2050/5 2050/6

Length of bed 1675 mm 2135 mm 2740 mm 3045 mm 3655 mm 4250 mm

Admit between Center 555 mm 1015 mm 1610 mm 1910 mm 2500 mm 3150 mm

Floor space 2650 × 1400

3100 × 1400

3700 × 1400

4000 × 1400

4600 × 1400

5200 × 1400

Approx weight (Kgs.) 1300 1500 1700 1900 2100 2350

Motor H.P. 3 H.P. 3 H.P. 3 H.P. 3 H.P. 5 H.P. 5 H.P.

REVISION-01

PAGE NO. 6 1.2 PACKING SLIP Machine Model: 2050/ _ Machine Specifications: ___________ Machine Sr. No.: H- Date: ___________

STANDARD ACCESSORIES EXTRA ACCESSORIES 1 2 3 4 5 6 7 8 9

10 11 12

13

14 15

16 17

Hardened guide ways Center adopter Dead Center MT-4 Carrier Plate Instruction Manual Tool Post Key Norton gear box Change gears fitted with machine: 33-39-44-88-90 T. Change gears packed in tool box: 41-110 T. Oil can Screw driver Allen keys: 4 – 5 – 6 – 8 - 10 mm. Fixed spanner: 12 X 13, 16X17, 18X19,1/2”X5/8” Long cross slide Electric motor H.P.____ Make _________ Sr. No. ________ RPM ________ V-Belts No. ____ Switch shaft with R/F switch

1 No. 1 No. 2 Nos.1 No. 1 No. 1 No. 1 No. 5 Nos.

2 No. 1 No. 1 No.

5Nos.

4Nos.1 No. 1 No.

2 Nos.1 No.

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15

16

17 18

Face plate (Ø 500 mm) Steady rest( I.D.Ø 180 mm) Follow rest Coolant equipments with tank & fittings.Make.Rajamane HP.0.13 Sr. __________ RPM.:- 2800 3 Jaw self centering chuck with flange φ____________________ 4 Jaw dog chuck with flange φ_________________________ Extra chuck flange Taper Turning Attachment Machine lamp With C.T. Rear tool post Electric control Panel Foot pedal/foot brake Rear splash guard Revolving center MT-4 Quick change tool post with 5 tool holders In./Ext./ Combine tool post grinder with/ with out electric motor Key way cutting attachment Anti vibration pads

No. No. No. No.

No.

No.

No. No. No. No. No. No. No. No. No. No. No. No.

Any Other accessories:

Mode of Packing : ________________________________________________

Name & Address : ________________________________________________ ________________________________________________ ________________________________________________

Checked By : _____________

- It any discrepancy is found with regard to the above accessories. It should be Immediately notified to us along with machine serial no.

REVISION-01


2050 07

1.3 List of Accessories.

1.3.1 Standard Accessories :- ( to be supplied with machine )

(01) Harden guide ways of lathe bed. (02) Electric Motor with V-Belts. (03) On-Off push button with Forward – Off – Reverse shaft. (04) Norton gear box (05) Long cross slide. (06 ) Carrier plate. (07) Centre adapter. (08) Dead centre – MT-4. 2nos. (09) Instruction manual with test chart. (10) Tool post bolt key.

(11) Change gears. For inch / mm threading. (For 4 TPI Lead Screw) (12) Oil can. (13) Screw driver. (14) Allen keys. (15) Fixed spanner. 1.3.2 Optional Accessories ( To be order along with machine )

(01) 305 mm Center height. (02) 6 mm pitch lead screw in lieu of 4 TPI lead screw. (03) Electrical coolant pump. With tank & fittings. (04) Rear tool post with tool holder. (05) Taper turning attachment. (06) Rear splashguard. (07) Drift type tail stock spindle (08) Rake operated tail stock unit. (09) Front lever collets attachment with collets.

REVISION-01

PANTHER MODEL PAGE NO.

2050 08 1.3.3 Optional Accessories (Retro fitting possible)

(01) Face plate. (02) Steady rest pad type. (03) Follow rest pad type. (04) Chuck flange. (05) Machine lamp. (06) Quick-change tool post with 5 tool holders. (07) Internal or external or combine tool post grinder with or with

out elect. motor. (08) Keyway cutting attachment. (09) Revolving center MT-4. (10) 3-Jaw self-centering chuck or 4-Jaw Dog chuck.

(11) Change gears for DP & Module threads. 1.3.4 List of change gears ( 9 DP ) required for

1.3.4.1 Machine having 4 TPI lead screw.

(A) For British & Metric threads. 33-39-41-44-88-90-110.T. (B) For DP & Module threads. 28-33-39-56-110(Optional)

1.3.4.2 Machine having 6 mm pitch lead screw. (Optional)

(A) For British & Metric threads 30-45-60-64-80-100-100-120-127T(B) For DP & Module threads 21-28-40-55-80-81-99-120T.

REVISION-01


2050 11 1.4 Legend.

(01) Pedestal (LH) (02) Pedestal (RH) (03) Chip & coolant Tray (04) Bed (05) Head stock (06) Spindle (07) High/Low speed changing lever I,II (08) Speed changing lever A,B,C & D (09) Feed changing lever (10) Oil filling plug for head stock (11) Oil sight glass for head stock (12) Oil drain plug for head stock (13) Norton gear box (14) Feed selecting lever ( A-B) (15) Feed selecting lever (C-D) (16) Engage / Disengage lever (17) Feed selecting lever (1 to 8) (18) Oil filling plug for Norton gear box (19) Oil sight glass for Norton gear box (20) Oil drain plug for Norton gear box (21) Lead screw (22) Switch shaft (23) Rev/For. Operating handle (24) Lead screw bracket (LH) (25) End feed gear train cover (26) Apron (27) Half nut engaging lever (28) Feed engaging knob (29) Feed selecting lever (30) Hand wheel for long. travel

REVISION-01


2050 12

(31) Thread dial indicator (32) Carriage (33) Surface slide (34) Compound slide (35) Hand wheel for surface feed (36) Carriage locking bolt (37) Handle for compound slide (38) 4 way tool post (39) Handle for tool post (40) Tail stock (41) Tail stock quill (42) Tail stock quill clamping handle (43) Tail stock clamping bolt (44) Hand wheel for tail stock quill (45) Tail stock setting bolt (46) Motor mounting bracket (47) Electric motor (48) V – Belts

NOTE:- Middle pedestal is not applicable in machine model 2050/1, 2050/2 & 2050/3, but it is applicable in model 2050/4 and onwards.

REVISION-01


2050 13

SECTION – 2

INSTALLATION 2.1 Lifting of the machine

While lifting the machine by crane, proper care should be taken to

prevent damage of machine paints, components and levers. Use suitable wooden block or felt packing, whenever chances of damage to machine part due to contact of rope or chain are possible. Suitable capacity ropes / chains should be used, while lifting the machine and It should be lift in balance position. For proper balancing of the machine, move tail stock and carriage at appropriate position and clamp on bed.

2.2 Unpacking and cleaning

Once machine is brought in shop Floor, for unpacking of the machine, proper care should be taken. In case of machine with case packing, Top direction is marked on wooden case. It is suggested that the packing case is opened soon after its receipt and verification is made for the standard and extra accessories mention in packing slip.

Prior to dispatch, all slides all unpainted parts, handles etc are coated with anti corrosive / rust – preventive. This should be carefully removed and wiped dry and then all bright machine parts should be oiled immediately.

2.3 Foundation

The lathe machine can give satisfactory performance only, if it is put on proper foundation and proper leveling is done. Foundation should be prepared as per foundation drawing and sufficient time should be allowed for concrete slab to be fully cured and dried. The depth of the foundation slab given in foundation drawing is only recommendary and it should be directly decided by the users, depending upon the soil condition and surrounding atmosphere. The load bearing capacity of the soil should be taken in account for preparing foundation

REVISION-01


2050 16

2.4 Levelling

Leveling is very important and should be carried out with proper care. The accuracy of sprit level which recommended is 0.020mm/mtr. For levelling follow the procedure given below.

- Keep the precision level on surface slide top face at centre in

transverse position. - Adjust the levelling bolt to make the position of level bubble in

centre. - Move carriage slide without disturbing level towards head stock

side and adjust the bubble in level at centre position by adjusting level bolt.

- Move carriage slide toward tail stock side and repeat the procedure.

- Make both the readings at head stock side and tail stock side to be identical.

- After setting transverse level, move the carriage to the centre of bed.

- Keep precision level on surface slide top near V guide ways of bed in longitudinal position.

- Ensure the bubble position at centre of level by using thin paper if required.

- Move carriage towards head stock side and than tail stock side and ensure the variation and adjust level if required.

- Re check the transverse level.

After proper leveling of machine, run machine for about 2 hours at various speed and feed and re check levels and re set the level if required.

Then the foundation bolts are grouted in larger holes with 1:3

cement and sand mixture. Sufficient time should be allowed for concrete to cure. The foundation bolts are then tightened without undue force. Periodically check up bed level to ensure continued level accuracy.

REVISION-01


2050 19

2.5 Electric Connection:

2.5.1 Machine supplied without electric panel:

Machine is supplied with electrical, hence internal wiring of electric motor and reverse/forward switch is done in machine. Give Elect.power supply of three phase and proper earthing to machine. DOL starter is provided for over load protection. Keep rev. / for. handle in center position for safety. Give power supply to machine and check machine body with tester for leak aging of power supply for safety. Press ON push button to start power supply. Rotate rev. / for. handle in required position to start machine. Check machine spindle rotation, it should be matched with position of rev. / for. start handle. If position is not matched than interchange any two pair of leads from main elect. Supply. During connection of power, main power supply should be kept off.

To stop the machine press OFF push button on rotate rev. / for. handle in center position. If machines stopped by OFF push button, for restart machine ON push button should be used. If machine stopped by rev / for handle, machine can restart by same handle without pressing push buttons. Thus this system provides facility to operate machine from two points (1) from push button at headstock (2) from handle at apron.

2.5.2 Machine supplied with electric panel ( Optional ) :

If machine is supplied with electric panel than internal electric

wiring of electric motor and controls is done with wiring panel kept in electric cabinet. Wiring diagram is also given in this manual. Give Elect.power supply of three phase and proper earthing to machine. Please check machine body with tester for leak aging of power supply for safety. Switch on machine by rev/for start handle given at apron box. Check machine spindle rotation, it should be matched with position of rev/for start handle. If position is not matched than interchange any two pair of leads from main elect.supply. During connection of power, main power supply should be kept off.

REVISION-01


2050 21

2.6 Idle running of the machine:

At the time of machine dispatch, speed and feed levers are set for the lowest value. You are requested to ensure that these positions are maintained at the time of starting the machine to avoid any accidental switching on at high speed and feed, which may damage the machine.

Machine saddle, tail stock spindle etc are kept locked at the time of machine dispatch. Do not try to move them until they are properly cleaned, lubricated and unlocked.

Ensure you should know how to start/stop the machine before starting 2.7 Lubrication

Proper lubrication of lathe machine plays vital roll to retain accuracy and gives satisfactory service. If lubrication is neglected the bearing surface may be damage, impairing the accuracy and shortening the life of machine.

Lubrication headstock and Norton gearbox are done by splash lubrication. Oil level indicator is provided in headstock and Norton gearbox. Check oil level through oil level indicator regularly, if oil level seems down then pour oil through oil filling plug.

In initial period, or first time running oil should be changed after first 300 hours running and than after 500 running hours.

Latter on oil can be used up to 1000 to 1500 running hours. Before filling new oil, the headstock should be washed with kerosene and thoroughly dried. Quantity of oil and type of oil to be used in headstock and Norton gearbox is show in lubrication chart. Lubrication of apron, surface slide, lead screw and tailstock are done by oilcan. Various oil holes are provided for lubrication.

All the oil holes, oil cups, grease nipple of the lathe machine should be inspected and filled at least once in day or more often, if machine is operate day and night shifts or high speed and feed value is engaged. Dirt chip should be brushed away before oiling or greasing to prevent them to enter in to holes.

REVISION-01


2050 22

2.7.1 Lubrication through various oil holes:

Oil holes are provided at various places for oiling. (1) Arm plate stud, (2) Thread dial indicator. Apply oil daily in these oil holes by oil can.

2.7.2 Lubrication through various oil nipples:

Various oil nipples are provided for oiling. (1) Carriage screw, (2) Carriage screw nut, (3) Compound screw, (4) Compound screw nut, (5) Surface slide, (6) Compound slide, (7) Tail stock body bore. Apply oil daily in these oil holes by oil can.

2.7.3 Lubrication through oil cups:

Small oil cups are provided for lubrications. (1) Carriage (2) Lead screw bracket (3) Tail stock body Apply oil daily to oil cups by oil can.

2.7.4 Apron:

One oil level indicator is given in front face of apron box. Pour oil through oil pouring hole given on top face of carriage slide up to level marked in oil level indicator if required. One oil drain plug is given at the bottom face of apron body to remove oil from apron box.

2.7.5 List of recommended lubrication:

Sr. No. Company

Head stock Feed box

Apron

Guide ways Lead screw Tail stock

1 HPCL PARTHAN EP 220 WAYLUB 220 2 BPCL MAK AMOCAM 220 WAYLUB 220 3 ISO GRADE 320 220 4 CASTRO OIL GEAR OIL 320 MAGNA 220 5 MOBIL OIL GEAR OIL 632 VACTRA 4 6 SHELL OIL OMALA 320 TONNA 220

REVISION-01


2050 23 SECTION - 3

OPERATION 3.1 Safety

(1) Protect your eyes by wearing safety glasses. (2) Wear shoes with oil resistance soles. (3) If you have long hair, tie it back properly. (4) Do not wear long sleeved clothes or loose clothing. (5) Make sure that your work area should be free from chips,

coolant, elect. Wire, air-hoses, oils or any thing that can be get in your way and cause you to fall.

(6) Make sure that work holding are firm. (7) Make sure that tool holding are firm. (8) Ensure proper belt tension. (9) Refit covers and guards before the machine is put again into

operation after opening of any cover or guards. (10) Do not file work piece, when they are being rotate under power.

This is extremely hazardous. (11) Do not touch machine part immediately after machining; it may

have sharp edges and considerable amount of heat. (12) Wear rubber sole shoes while working on electrical cabinet. (13) All maintenance work should be done with power off condition. (14) Electrical shock can cause serious injury or loss of life. All

service and maintenance work within the electrical cabinet should be performed by qualified electrician in power off condition.

(15) When replacing fuse always replace them with the same type and rating. Do not substitute fuses for higher current or different voltage.

(16) While working on the machine parts like brake unit, transformer etc. it may be extremely hot. Take sufficient care when handling such parts.

(17) Do not shift gear in running condition of headstock & Norton gearbox.

REVISION-01


2050 24 3.2 Do, Do Not And Checks.

Do

- Check and maintain oil level in head stock, nortan & apron. - Amplified pitches. Do follow guideline given for amplified pitches. - The following table gives guideline for selection of maximum spindle

speed while cutting high range pitch threading / amplified pitches.

Metric Pitch English Thread Spindle Speed 2 12 240 3 8 160 4 6 110 5 5 110 6 4 75

DO NOT

- Do not open head stock covers or end feed gear covers while machine is running.

- Do not shift gears in motion. - Do not exceed speeds of chuck or face plate beyond the specified

limit. - Do not exceed more than 30 reversals of the motor switches per

hour. - Do not remove chucks from threaded spindle by rotating spindle in

reverse direction.

CHECKS

- Job weight limitation. Do not load jobs weighing more than 200 kgs. Without steady rest or centre support.

- Do not start the machine at high speed with heavy jobs. - Sudden reversal of spindle at speed 145 RPM is not recommended. - It is recommended that cast iron chucks should not be run at surface

speed more than 16 mtr. / Sec. Accordingly 200 mm diameter chuck should not run at more than 1500 RPM.

REVISION-01


2050 25

3.3 Head stock

Head stock pulley is directly driven by electric motor through two V-belts. Power transmission in side the headstock to main spindle is through gear arrangement. Total 8 nos. different spindle speeds are available.

Main spindle RPM is selected by two levers, High / low speed

changing lever (07) and Speed changing lever (08). Lever (07) has three different positions one is high-speed position second is neutral and third position is low speed range. Lever (08) have four different positions A, B, C and D. By selecting any one position of both levers spindle speed can be change.

Feed selecting lever (09) have three different positions Reverse.

Neutral and Forward feed. Oil sight glass (11) is provided for checking oil level in headstock.

Lubrication of main bearings, gears, shifters and shafts are done by splash lubrication system. It is necessary to keep always-proper oil level in headstock to give lubrication of head stock parts. Oil filling plug (10) is given on top face of head stock cover and oil drain plug (12) is given at backside of head stock bottom face.

CAUTION: Do not shift gear in running condition.

3.3.1 RPM Chart

SPINDLE SPEED IN RPM

Lever position A B C D

I 160 400 575 1235

II 30 75 110 240

REVISION-01


2050 26

3.4 Norton gear box:

Norton gearbox provides selection of various feeds and threads. Total 44 types of British threads and selecting different levers positions can cut 24 types of metric threads. Total 3 different knobs are given in Norton gearbox. Feed selecting knobs (14), (15) and (17). Knobs (14) have two different positions A and B, Knob (15) has two different positions C and D and Knob (17) have 8 different positions 1 to 8. For operating knob (17) first of all engage / disengage lever (16) is to be put in disengage position than rotate knob (17) for selecting any position from 1 to 8 and than again put engage / disengage lever (16) in to engage position.

Oil filling plug (18) and oil drain plug (20) is given for adding or

removing oil from Norton gearbox. Oil sight glass (19) is given for checking oil level in Norton gearbox. It is necessary to maintain proper oil level in Norton gearbox. Lubrication of Norton gearbox is done by splash lubrication system.

CAUTION: Do not shift gear in running condition.

3.5 End feed gears:

At the rear end of the headstock, change gear train is fitted to give longitudinal feed, transverse feed and threading operation. To change the direction of rotation of gear train, feed changing lever (09) is given in headstock.

One arm plate with arm stud and gunmetal bush is fitted with

Norton gearbox. Change gears are connected in this arm plate to give drive from head stock output gear to Norton gearbox.

REVISION-01


2050 27

3.5.1 Thread chart (For machine having 4 TPI lead screw)

BRITISH CHANGE

GEAR LEVER 1 2 3 4 5 6 7 8

33 88

AD 60 56 52 48 44 40 36 32

BD 30 28 26 24 22 20 18 16

AC 15 14 13 12 11 10 9 8

BC 7.5 7 6.5 6 5.5 5 4.5 4 33 44 BC 3.75 3.5 3.25 3 2.75 2.5 2.25 2

39 90

AD 38

BD 19 AC 9.5

BC 4.75

FEED mm/Rev.

LONGITUDINAL FEED 3.995/T.P.I.

TRANSVERSE FEED 0.9549 / T.P.I.

METRIC CHANGE

GEAR LEVER 1 2 3 4 5 6 7 8

39 88

AD 0.5 0.625 0.75 0.9375 BD 1 1.25 1.5 1.875 AC 2 2.5 3 3.75 BC 4 5 6 7.5

39 44 BC 8 10 12 15

41 88

AD 0.875

BD 1.75 AC 3.5 BC 7

FEED mm/Rev.

LONGITUDINAL FEED 0.1573 X PITCH

TRANSVERSE FEED 0.0376 X PITCH

REVISION-01


2050 28 3.5.2 Thread chart (For machine having 4 TPI lead screw)

(Optional)

DP Threads Gear Train Lever 1 2 3 4 5 6 7 8

33

110 56

AD 120 112 104 96 88 80 72 64

BD 60 56 52 48 44 40 36 32

AC 30 28 26 24 22 20 18 16

BC 15 14 13 12 11 10 9 8

33

110

28

BC 7.5 7 6.5 6 5.5 5 4.5 4

Longitudinal Feed = 3.995 / TPI mm/rev. Transverse Feed = 0.9549 / TPI mm/rev.

Module Threads

Gear Train Lever 1 4 6 8

39

110 56

AD 0.25 0.312 0.375 0.469

BD 0.5 0.625 0.75 0.9375

AC 1 1.25 1.5 1.875

BC 2 2.5 3 3.75

39

110 28

BC 4 5 6 7.5

Longitudinal Feed = 0.1573 × Pitch mm/rev. Transverse Feed = 0.0376 × Pitch mm/rev.

REVISION-01


2050 29

3.5.3 Thread chart (For machine having 6 mm pitch lead screw) (Optional)

BRITISH THREAD CHART Gear train Lever AD BD AC BC

1 60 30 15 7.5 2 56 28 14 7 3 52 26 13 6.5 4 48 24 12 6 5 44 22 11 5.5 6 40 20 10 5 7 36 18 9 4.5 8 32 16 8 4

1 75 37.5 18.750 9.375 2 70 35 17.5 8.750 3 65 32.5 16.250 8.125 5 55 27.5 13.750 6.875 6 50 25 12.5 6.25

1 45 22.5 11.250 5.625 2 42 21 10.5 5.25 3 39 19.5 9.750 4.875 5 33 16.5 8.250 4.125 7 27 13.5 6.750 3.375

1 15 7.5 3.75 1.875 2 14 7 3.5 1.750 3 13 6.5 3.250 1.625 4 12 6 3 1.5 5 11 5.5 2.75 1.375 6 10 5 2.5 1.25 7 9 4.5 2.25 1.125 8 8 4 2 1

REVISION-01

3.5.3 Thread chart (For machine having 6 mm pitch lead screw) (Optional) METRIC THREAD CHART

Gear train Lever AD BD AC BC

1 0.5 1 2 4 4 0.625 1.25 2.5 5

6 0.75 1.5 3 6

8 0.9375 1.875 3.75 7.5

1 2 4 8 16

4 2.5 5 10 20

6

3 6 12 24

3.5.4 Mod. chart (For machine having 6 mm pitch lead screw) MODULE THREAD CHART

Gear train Lever AD BD AC BC .

1 0.25 0.5 1 2 4 0.3125 0.625 1.25 2.5 6 0.375 0.75 1.5 3 8 0.468 0.9375 1.875 3.75

55 x 120 80 28

1 - - 4 8 4

-- -- 55 10 6 - - 6 12 8 - - 7.5 15

55 x 99 80 21

4 1.375 2.75 5.5 11 5 - - 6 12 8 - 4.125 8.25 16.5


2050 30

REVISION-01


2050 31

3.6 Thread dial indicator:

Thread dial indicator is used during threading operation. By using thread dial indicator half nut with lead screw can engage at correct position during successive threading cuts, so that tool will follow the original cuts and it will eliminates the necessity of reversing the lathe spindle.

For British threading:

For all odd and even threads in each inch, close half nuts at any no. On dial. (For example at no. 4, 5, 6 etc.)

For all threads involving one half threads in each size, close half nuts at any alternative no. on dial. (For example 2, 4, 6 or 1, 3, 5)

For Metric threading:

During metric threading thread dial indicator will not be used and spindle has to run in reverse direction with out dis engaging half nuts in second and subsequent cuts till threading operation is completed.

3.6.1 Special threading not indicating in thread chart: British Threads:

Gear train for required TPI = Gear train of selected TPI × Selected TPI Required TPI

For example 19 TPI threads required. Than select nearest 18 TPI threads and set levers position as per 18 TPI of Norton gearbox, that will be B D - 7.

= 33 X 18 88 19

= 27 76

REVISION-01


2050 32 Metric threads:

Gear train of required pitch = Gear train of selected pitch × Required pitch Selected pitch

For example pitch required is 1.75 mm, than select nearest pitch of

1.5 mm and set levers as per 1.5 mm pitch that will be B D - 6. = 39 X 1.75

88 1.5 = 39 X 70 60 88

3.6.2 Feed Calculations: Longitudinal feed = 3.995 OR 0.1573 X Pitch ( in mm/rev. ) TPI Transverse feed = 0.9549 OR 0.0376 X Pitch

( in mm/rev. ) TPI

• For example if machine change gears set as per 10 TPI than - Longitudinal feed will be 3.995 = 0.3995 mm / rev. 10

- Transverse feed will be 0.9549 = 0.09549 mm / rev. 10

• For example if machine change gears set as per 2.5 mm pitch than

- Longitudinal feed will be 0.1573 X 2.5 = 0.39325 mm / rev. - Transverse feed will be 0.0376 X 2.5 = 0.094 mm / rev.

REVISION-01


2050 32 -A

FEED CHART FOR 2050 SERIES LATHE MACHINE

TRANSVERE FEED IN MM / REV. ( WITH TPI THREAD SETTING )

Gear Train Lever 1 2 3 4 5 6 7 8

33

-

88

AD 0.016 0.017 0.018 0.020 0.022 0.024 0.026 0.030

BD 0.032 0.034 0.036 0.040 0.044 0.048 0.052 0.060

AC 0.064 0.068 0.072 0.080 0.088 0.096 0.104 0.120

BC 0.128 0.136 0.144 0.160 0.176 0.192 0.208 0.240

33 - 44

BC 0.256 0.272 0.288 0.320 0.352 0.381 0.416 0.480

TRANSVERSE FEED IN MM / REV. (WITH METRIC THREAD SETTING )


39

-

88

AD 0.019 0.023 0.028 0.035

BD 0.038 0.046 0.056 0.070

AC 0.076 0.092 0.112 0.140

BC 0.152 0.184 0.244 0.280

39

-

44

BC 0.304 0.368 0.448 0.560

REVISION-01


2050 32 -B

FEED CHART FOR 2050 SERIES LATHE MACHINE

LONGITUDINAL FEED IN MM / REV. (WITH TPI THREAD SETTING)

Gear Train Lever 1 2 3 4 5 6 7 8

33

-

88

AD 0.066 0.071 0.076 0.083 0.091 0.100 0.111 0.124

BD 0.132 0.142 0.152 0.166 0.182 0.200 0.222 0.248

AC 0.264 0.284 0.304 0.332 0.364 0.400 0.444 0.496

BC 0.528 0.568 0.608 0.664 0.728 0.800 0.888 0.992

33 - 44

BC 1.056 1.136 1.216 1.328 1.456 1.600 1.776 1.984

LONGITUDINAL FEED IN MM / REV. ( WITH METRIC THREAD SETTING )


39

-

88

AD 0.079 0.098 0.118 0.147

BD 0.158 0.196 0.236 0.294

AC 0.316 0.392 0.472 0.588

BC 0.632 0.784 0.944 1.176

39

-

44

BC 1.264 1.568 1.888 2.352

REVISION-01


2050 33

3.7 Carriage :

Carriage slide is fitted on bed top face with one lock piece and setting wedge at rear side and two lock pieces on front side. On the top face of carriage, surface slide fitted on dowtail guide ways with setting wedge. On the side edge of carriage two tapped holes are given to clamp follow rest guide. Aluminum chip guards with felt are given at all four corners of carriage to prevent to enter dust and chips inside the sliding surface. Two oil cups with cap are provided on top face of carriage slide for lubrication of sliding surface. One lock bolt is provided on carriage surface to lock carriage movement if required.

Surface slide is fitted on carriage Dow tails. On the front face of

carriage one screw boss fitted to guide surface screw and nut. Surface screw and gear is fitted in carriage and surface screw gunmetal nut is fitted on bottom face of surface slide. One hand wheel with micro ring is fitted on surface screw to give manual hand feed to surface slide. On the top face of surface slide one circular T-slot is given and angular marking of 180 degree (90 degree on either side.) is done to set compound slide at any desire angular position.

Compound slide assembly is located in center of surface slide

and clamped with surface through two nos. T-bolts. One 4-way tool post is fitted on top face of compound slide to hold tools.

3.8 Apron box:

Construction of apron gearbox is rigid, oil bath and box type.

Apron gearbox is fitted at bottom face of carriage. Lead screw is a pass through apron gearbox worm to give drive to apron box. One thread cutting lever is fitted on left side of apron gearbox. This lever operates engage / dis engages of half nut on lead screw during threading operation. Thread dial indicator is fitted on left hand side of apron gearbox.

REVISION-01


2050 34

Feed selecting lever with spring-loaded plunger is provided on apron gearbox. This lever has 3 positions Reverse, Neutral & Forward feed. Thread cutting lever and feed selecting lever are inter locked with each other to prevent operating of both levers simultaneously. During thread cutting operation feed selecting lever should in neutral position, otherwise thread cutting lever will not work. Similarly during turning operation thread cutting lever should be in dis engage condition with lead screw, otherwise feed selecting lever will not work.

One star knob type wheel is given on apron gearbox to engage or dis engage feed. By tightening this star knob wheel feed will engage through taper washer.

One hand wheel is provided to move carriage slide on lathe bed by manual operation.

3.9 Tail stock :

Tail stock body with tail stock base is fitted on lathe bed to provide support during turning operation or to perform drilling, boring, taper turning, and etc. operation. Tail stock assembly is clamped on lathe bed by one tailstock-clamping pad and bolt. After setting tailstock at desire position on bed. It should be clamped with bed by clamping bolt. Two setting bolts are provided on either side of tail stock base to set alignment of tail stock spindle with lathe spindle.

Tail stock spindle guide in tail stock body and moves axially by hand wheel and screw nut assembly fitted with hand wheel. One clamping handle is given to clamp tail stock spindle movements if required.

Least count of hand wheels:

Longitudinal movements by apron hand wheel = 0.240 mm / div. Transverse movements by carriage hand wheel = 0.050 mm / div. Compound slide hand wheel = 0.050 mm / div. Tail stock spindle movement by hand wheel = 0.050 mm / div.

REVISION-01


2050 35 SECTION – 4 SETTINGS, MAINTENANCE & TROUBLE SHOOTINGS

Proper care and maintenance of the machine is most important

factor to increase life and reliability of machine performance. Following are the few important settings, which needed attention.

4.1 Head stock 4.1.1 Taper setting.

Headstock is mounted on bed by six bolts. To set head stock

alignment, first loose bolts slightly and than insert test mandrel of 300 mm length in spindle nose and aligned axis of taper mandrel with longitudinal movements and clamped bolts.

4.1.2 Spindle.

Main spindle runs in two taper roller bearings. To adjust radial

or axial clearance of spindle tightens check nuts so that the spindle can be rotate by hand with light drag.

4.1.3 V Belts.

Main electric motor is mounted on motor mounting bracket on

backside of lathe bed. Two nos. V-Belts are fitted between motor pulleys and head stock pulley. To adjust belt tension, un clamps four bolts of elect. motor and re adjust the position of motor on motor mounting bracket and clamp bolts.

4.2 Lead screw

Lead screw is coupled with out put shaft of Norton gearbox by

dowel pin.

REVISION-01


2050 36

4.3 Carriage

Carriage is fitted on bed with one V guide and one flat surface. Carriage is set on bed guide ways with two keeper blocks on operator side and one keeper plate with parallel wedge in rear side.

4.4 Surface slide and Compound slide.

Surface slide and compound slide is scraped and matched in guide ways with one wedge, Setting bolts are given to set slide wedge clearance.

4.5 Tail stock

Taper turning of long job can be done by off setting of tail stock

with respect to head stock center line. In tail stock base two setting bolts are given on either side. By loosen one setting bolt and tighten other setting bolt tail stock body can be set off set.

4.6 Tool post

After long use the tool post clamping handle may extend beyond

the convenient zone of clamping. To get back proper angle of tool post clamping handle face the bottom spacer of clamping lever by required amount.

4.7 Half nut

Half nuts are guided in prismatic guide ways of apron body.

Setting bolts given on left hand side of apron body can set clearance of guide ways. First loosen slightly two hex bolts given on prismatic guide ways and complete settings, After completing settings, clamping bolts should be tighten.

REVISION-01

PANTHERMODEL

PAGE NO.

2050 37

4.8 Trouble shootings and remedy

Sr. Trouble Cause Remedies 1. Machine

vibrates while running.

(A) Improper leveling. (B) Job not balanced.

Level machine properly and tighen on foundation Balance job by adding counter weight and reduce spindle speed and feed.

2. Machine vibrates while machining and chatter mark on job.

(C) Improper tension of V belts.

(D) Excessive tool over hang.

(E) Wrong tool. (F) Wrong cutting

parameters. (G) Improper tool

center. (H) Work holding not

rigid. (I) Clearances

between carriage, surface, or comp. slides are not proper.

(J) Slender components machine without support.

(K) Back plate of chuck is loose.

(L) Pre loading of main spindle is not correct.

Adjust V belt tension. Reduce over hang of tool and clamp tool rigidly. Check proper tool material and tool geometry. Select proper speed, feed and depth of cut consider job material, tool material and job diameter. Adjust correct tool center. Check job holding. Adjust proper clearances between all wedges. Put proper support to job. Check back plate of chuck. Adjust pre loading of spindle.

REVISION-01


2050 38

Sr. Trouble Cause Remedies 3. Spindle runs too

tight or loose.

(A) Preloading of spindle is not proper.

Adjust check nuts given at rear end of head stock such that spindle should rotate by hand with light drag.

4. Machine cuts taper on job.

(A) Alignment of head stock is not proper.

Align head stock axis with carriage movement

5. Machine cuts taper on job held between centers.

(A) Alignment of tail stock not proper.

(B) Improper M/c level.

(C) Tool worn out.

Align tail stock axis. Level machine properly. Regrind or replace tool.

6. Gear train in end feed gear train makes sound during running.

(A) Backlash of change gear is not proper.

(B) Fixing nut bolts not proper tight.

(C) Some damage mark on gear teeth.

(D) Lubricant is not sufficient.

Adjust backlash of change gears. Tighten fixing nut and bolts. Inspect and remove damage mark from gear. Provide sufficient lubrication.

7. Machine is not able to take heavy cuts.

(A) Belt tension is not proper.

Adjust proper belt tension.

REVISION-01


2050 39

Sr. Trouble Cause Remedies 8. Threading over

lapse.

(A) Excessive axial play of lead screw.

(B) Excessive play in half nuts.

(C) Gear train or Norton lever position is not proper.

(D) Engagement of half nut is not proper.

Set axial play of lead screw. Set play of half nuts. Set proper gear train or proper lever position of Norton gearbox. Engage half nut as per instruction given in thread dial indicator.

9. Noise in headstock.

(A) Lubricant is not sufficient.

(B) Gear damage. (C) Bearing damage.

Check oil level and maintain proper oil level. Replace damage gear. Replace bearing.

REVISION-01


2050 41 SECTION - 5 ASSEMBLY DRAWINGS & SPARE PART LIST

5.1 Structure Assembly :

Drg. NO. Part Name Qty.

6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014

Pedestal ( LH ) Pedestal ( RH ) Pedestal ( Middle ) For 2050/4 and Onwards Pedestal window Knob with stud for pedestal window Chip & coolant tray Lathe bed Gap for lathe bed End feed gear train cover V Belt guard Motor mounting bracket Rev / For switch cover Rake (Quantity as per machine size) Head stock window

1 1 1 1 1 1 1 1 1 1 1 1 - 1

REVISION-01


2050 45

5.2 Head Stock Assembly :


1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1201 1202 1203 1204 1205 1206 1207 1208 1209 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310

Head stock body Driving shaft Diving shaft gear 25 Teeth Check nut Bearing spacer Circlip Driving shaft out side cover Ball bearing 6206 Motor pulley Driving pulley Middle shaft with 16 Teeth gear Middle shaft gear 30 Teeth Gear 37 Teeth Gear 50 Teeth Gear 40 Teeth Spacer for bearing Spacer Middle shaft out side cover Ball bearings 6206 Spline shaft Gear 17 Teeth Gear 48 Teeth Gear 42 Teeth Gear 56 Teeth Gear 35 Teeth Gear 22 Teeth Coupling for spline shaft gear Spline shaft bearing housing Spline shaft front cover

1 1 1 2 2 1 1 2 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1

REVISION-01


2050 46


1311 1312 1313 1314 1315 1316 1401 1402 1403 1404 1501 1502 1503 1504 1505 1506 1507 1508 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1701 1702

Spline shaft rear cover Bearing spacer for spline shaft Ball bearings 6304 Puller bush Ball bearing 6206 Bearing spacer Idler shaft Idler shaft gear 28 Teeth G.M.Bush for idler gear Washer Change gear spline shaft Bottom gear 30 Teeth Bottom gear 39 Teeth Change gear shaft housing Out side cover for bearing housing Ball bearing 6006 Ball bearing 6204 Spacer Spindle Driving button Inner spacer Spindle gear 67 Teeth Spindle gear 36 Teeth Feed drive gear 52 Teeth Feed drive gear 40 Teeth Rear bearing spacer Spindle check nuts Rear bearing cover Front bearing cover Taper roller bearing 32216 Taper roller bearing 32214 Shifter for spline shaft gear Shifter lever

1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2

REVISION-01


2050 47


1703 1704 1705 1706 1707 1751 1752 1753 1754 1755 1756 1757 1801 1802 1803 1804 1805 1806 1807 1901 1902 1903 1904 1905 1906 1907 1908

Spring with steel ball Shifter lever pin Spacer Fork for spline shaft gear Ball grip connector Shifter for cluster gear Backelite knob Taper pin Shifter lever pin Spacer Fork for cluster gear Taper pin Feed reversing lever Fork for bottom gear Pin for feed reversing lever Washer Spacer Boss for feed reversing lever Shifter lever Top cover Oil filling plug Oil drain plug Oil level indicator Side cover stud Side cover knob Side cover knob collar Side cover knob stud

2 1 1 1 2 1 3 3 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 2 1 1 1

REVISION-01


2050 49

5.3 End Feed & Switch shaft Assembly:


7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030

Change gears (33-39-41-44-88-90-110) Arm plate Arm plate studS Gun metal bush of arm plate stud Clamping stud of arm plate Norton gear box Lead screw Lead screw bracket (RH) Thrust bearing - 09 Gun metal bushes for lead screw bracket Switch shaft bush Switch shaft Rev / For operating handle Switch shaft guide plate Switch shaft bush stud Coupling Stop plate Switch shaft guide bush strip Rev / For operating lever Rev / For handle cover Roller Roller pin Switch shaft guide bush Collar Rev / For switch plate Rev / For switch DOL starter Push button box Fuse Fuse box

1 set

1 1 1 2 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1

REVISION-01


2050 50-A

IMPORTANT NOTE

For the maintenance purpose, if Norton gearbox cover (Part no. 2039) is Opened, following precaution should be taken during re-assembling of Norton gear box cover. Please refer instruction and spare part manual page no. 50 & 53

Refer page no. 53

Knob for position 1 to 8 (part no. 2049) is fitted out side Norton gearbox cover. This knob is given for operating of rake gear shaft 12 teeth (part no.48).

Please ensure that position of knob (part no.2049) should be at position no.1 (out of position no. 1 to 8) than only this cover should be re-assemble to Norton gear box body.

Refer page no. 50

Tumbler gear 24 teeth (part no.2020) is sliding assembly and this assembly can be axially slide along with tumbler rake drum (part no.2016). This tumbler gear (part no. 2020) can be engage with series of 8 gears (part no. 2027 to part no. 2034) depends on position of knob for position 1 to 8 given on Norton gear box cover. Now as per earlier instructions, knob for position 1 to 8 (Part no. 2049) is kept on no. position no. 1 means tumble gear 24 teeth (part no. 2020) also should be engaged with related gear out of series of 8 gears and than position is gear teeth 30 (part no. 2027). If tumble gear 24 teeth (part no. 2020) engaged with gear teeth 20 (Part no. 2027) it will become position no. 1 and if tumbler gear 24 teeth (part no. 2020) engaged with gear teeth 16 (part no. 2034) it will become position no. 8. If this relation is not maintain during re-assembly of Norton gear box cover, it will create problem during thread cutting operation because knob for 1 to 8 (part no. 2049) will not reflect exact required gear ratio.

REVISION-01


2050 50-B

Position of knob for position 1 to 8 (part no.2049) are indicating position no.

Tumbler gear 24 teeth (part no.2020) should be engaged with

Position indicate no. 1 Gear teeth 30 (part no. 2027) Position indicate no. 2 Gear teeth 28 (part no. 2028) Position indicate no. 3 Gear teeth 26 (part no. 2029) Position indicate no. 4 Gear teeth 24 (part no. 2030) Position indicate no. 5 Gear teeth 22 (part no. 2031) Position indicate no. 6 Gear teeth 20 (part no. 2032) Position indicate no. 7 Gear teeth 18 (part no. 2033) Position indicate no. 8 Gear teeth 16 (part no. 2034)

REVISION-01


2050 55

5.4 Norton gear Assembly :


2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030

Main body Input shaft Input shaft housing Input shaft outside bearing 6206 Cluster gear Teeth 16 / 24 Input shaft inside bearing 6203 Intermediate shaft Idler gear Teeth 32 Idler gear Teeth 14 Idler gear Teeth 24 Bottom shaft bearing cover Bottom shaft Cluster gear Teeth 24 / 42 Bearing LH side 6203 Bearing middle 6205 Tumbler rake drum Idler gear bracket with ball pin Tumbler rake drum gear Teeth 24 Gear locking cover Tumbler gear Teeth 24 Locating pin for gear Bearing housing Bakelite knob Bearing RH side 6203 Out put shaft Bearing LH side 6203 Gear Teeth 30 Gear Teeth 28 Gear Teeth 26 Gear Teeth 24

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

REVISION-01


2050 56


2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060

Gear Teeth 22 Gear Teeth 20 Gear Teeth 18 Gear Teeth 16 Gear lock nut Out put shaft bearing RH 6205 Out put shaft bearing cover Out put shaft coupler Body cover Shifting fork for position A-B Pin with lever for position A-B Guide bush for position A-B Knob for position A-B Shifting fork for position C-D Pin with lever for position C-D Guide bush for position C-D Knob for position C-D Rake gear shaft 12 Teeth Knob for position 1 to 8 Inter locking block Inter locking key Positioning side plate Wedge block Cam with pin Knob for engage / disengage Knob handle Locking pin for engage / disengage Oil filling plug Oil level indicator Oil drain plug

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1

REVISION-01


2050 59

5.5 Carriage, Surface and Compound slide Assembly :


3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028

Carriage Rear keeper plate Setting wedge Front keeper blocks Clamping bolt Oil cups Surface boss Micro ring Surface slide hand wheel Plastic handle grip with stud Surface screw Surface screw gun metal nut Surface slide Surface wedge T bolts Surface slide cover Chip tray Compound slide base Compound slide Compound screw Compound screw nut Compound screw boss Compound slide handle Compound slide wedge Compound slide micro ring Tool post stud Index ring Lock pin with spring

1 1 1 3 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1

REVISION-01


3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043

Tool post Tool clamping bolts Tool post bolts key Tool post clamping boss Tool post clamping handle Washer Wiper LH Flat Wiper LH & RH ‘V’ Wiper RH Flat Surface Screw gear Z=13 Teeth Thrust Bearing 06 Surface Setting Bolt Compound Setting Bolt Bolt for lock pin Bakelite knob

1 8 1 1 1 1 1 2 1 1 1 5 4 1 1


2050 60

REVISION-01


2050 66

5.6 Apron Assembly :


4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028

Apron body Surface feed gear Z=35 Teeth Surface gear pin Half nut engaging handle with plastic grip Half nut shaft cap Half nut shaft Half nut operating shaft pin Half nuts Half nut setting wedge Setting wedge clamping bolts Setting bolts for wedge Feed selecting handle with pin and spring Feed selecting lever Eccentric pin of feed selecting lever Inter locking key Feed engaging knob Feed engage shaft boss Connecting arm Connecting arm gear Z=25 Teeth Connecting arm gear pin Boss gear Z=18 Teeth Check nut for boss gear Driving Washer Worm wheel support Worm wheel Z=29 Teeth Driving washer pin Taper washer Worm single start

1 1 1 1 1 1 2 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1

REVISION-01


2050 67


4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047

Gun metal worm guide bushes Bakelite knob Worm unit cap Feed engaging stud Rake pinion shaft Z=12 Teeth Gear Z=85 Teeth Hand operated gear shaft Z=15 Teeth Gear shaft boss Gear shaft bearing 6005 Micro ring Hand wheel Plastic grip with handle shaft Oil level indicator Oil drain plug Thread dial indicator body Thread dial indicator pin Thread dial indicator gear Z= 24 Teeth Thread dial indicator clamping stud Lead screw Aluminum cover

2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

REVISION-01


2050 70

5.7 Tail Stock Assembly :


5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017

5018 5019

Tail stock base Tail stock setting bolts Tail stock body Tail stock quill Gunmetal pad for tail stock quill clamping Tail stock quill clamping handle Plastic grip for handle Quill key Tail stock screw Tail stock screw gunmetal nut Tail stock screw boss Micro ring Hand wheel Plastic grip for hand wheel with stud Tail stock clamping stud Tail stock clamping plate Thrust bearing 06 Tail stock clamping stud washer

Tail stock clamping stud nut

1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

REVISION-01

5.8 SWITCH SHAFT ASSEMBLY (OPTIONAL)


2050 75

Part No. Part Name Quantity 7401 Guide plate 1 7402 Lock ring 1 7403 Lock pin 1 7404 Guide bush 1 7405 Spring 1 7406 Guide bush key 1 7407 Handle ring 1 7408 Hinge bolt 2 7409 Handle 1 7410 Plastic grip 1 7411 Limit switch box 1 7412 Limit switch box cover 1 7413 Switch Shaft Collar 1 7414 Limit switch No. BCH(PSRL-L/R) 2 7415 Operating dog bolt 1 7416 Switch shaft 1 7425 Pivot plug 2 7426 Strip (LH & RH) 2 7427 Angle bracket 2 7428 Stopper Stud 4 7429 Plug for Foot pedal 2 7430 Foot pedal 1 7431 Spring 2 7432 Limit Switch No. essen (LSOS-C) 1 7433 Limit Switch setting plate 1 7434 Limit Switch setting Angle 1 7435 Foot pedal cover 2 7436 Electro Magnetic Brake Disc 1 7437 Electro Magnetic Brake 1 7438 Spacer 1

REVISION-01


2050 76

5.9 Extra Accessories :

Drg. NO. Part Name

X001 X002 X003 X004 X005 X006 X007 X008 X009 X010 X011 X012 X013 X014 X015 X016 X017 X018 X019 X020

Face plate Steady rest base Steady rest body Steady rest clamp Follow rest Coolant pump with on / off switch Coolant tank Spout assembly Machine lamp Chuck flange Self centering chuck Dog chuck Rear splash guard Rear tool post with tool holders Revolving center Internal / External / combine tool post grinder Electric motor for tool post grinder with switch Quick change tool post with 5 tool holders Key way cutting attachment Taper turning attachment

REVISION-01

MODEL: ________ MACHINE NO. : __________


2050 77

SR. FIGURE OBJECTS PERMISSIBLE DEVIATIONS

ACTUAL ERROR

1 a

b

Straightness of carriage slide ways (a) In longitudinal

direction (b) In transverse

direction.

0.03 mm (Convex)

0.04

2

Straightness of carriage movement in horizontal plane.

0.02mm

3 CONST.

Parallelism of tailstock movement to carriage movement (a) In horizontal plane (b) In vertical plane

0.03 mm

0.03 mm

4

b

a

b

F

(a) Periodic axial slip (b) Coming of the face

plate mounting surface

(a) 0.01mm

(b) 0.02 mm

5 F

Run out or spindle nose 0.01 mm

6

a b

L

True running of taper bore of spindle (a) Near to the spindle (b) At a list. 300 mm

0.01 mm 0.02 mm

7

L ba

Parallelism of spindle axis to the carriage movement (a) In horizontal plane

(b) In vertical plane

(a) 0.015/300 (towards tool only) (b) 0.02/300 (upwards only)

REVISION-01

MODEL: ________ MACHINE NO. : __________


2050 78


ACTUAL ERROR

8 a

b

Parallelism of external surface of tailstock sleeve to carriage movement (a) In horizontal plane (b) In vertical plane


9 a

b L

Parallelism of taper bore of tailstock sleeve to carriage movement (a) In horizontal plane (b) In vertical plane


10 Difference in height between headstock and tailstock centre

0.04 mm (Tailstock centre higher than head stock centre)

11

Parallelism of the longitudinal movement of the tool slide to the spindle axis

0.04/300

upwards only

12

90°

Square ness of the transverse movement of the cross slide to spindle axis

0.02/300 mm

13 Axial slip 0.015 mm

14

L

Accuracy of the pitch generated by the lead screw

(a) 0.04/300

(b) 0.015/50

REVISION-01

PRACTICAL TEST

MODEL: ________ MACHINE NO.: __________

• THE MACHINE CONFIRMS TO GRADE – 1 STANDARD OF ACCURACY AS PRESCRIBED BY D.O. (TOOLS).

• THE TEST CHART USED IS TO IS : 1878 (PART – 1) – 1971.

- TESTED BY : ______________________. - INSPECTION DEPT : ______________________.

For, Gujarat Lathe Mfg. Co. Pvt. Ltd. Shapar (Dist. Rajkot)


2050 79


ACTUAL ERROR

1

L

D

S

Turning of cylindrical test piece held in chuck (a) Roundness (b) Cylindricity

(a) 0.01 (b) 0.04/300

2

SL

D

Facing of cylindrical test piece held in chuck (Flat or Concave only.)

0.025/300 dia.

3

L

Thread cutting a cylindrical test piece (a) Deviation over

length or 300 (b) Deviation over

length of 50

(a) 0.04 mm (b) 0.015 mm

4

Hardness of lathe bed (a) Standard bed (b) Flame harden bed

180 BHN min. 300 BHN min.

all geared lathe machinehandling this machine. as the machine and accessories are constantly being...

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