rexnord tabletop and mattop chains · 2014. 12. 13. · 4 for technical assistance contact rexnord...

Rexnord® TableTop® and MatTop® Chains

CONVEYOR DESIGN MANUAL I VERSION 2

Rexnord® 7956 Series MatTop® Chains• Rexnord® 7956GT MatTop® Chain

• Rexnord® 7956B MatTop® Chain

• Rexnord® 7956 No TAB MatTop® Chain

REXNORD® FLATTOP NORTH AMERICA

For technical assistance contact Rexnord FlatTop Application Engineering at 262-376-4800

Rexnord Industries, LLC

For more than one hundred years, Rexnord has provided superior power transmission, bearing, aerospace and specialty components to industry across the globe. We pride ourselves in commitment and dedication to the customer – from development to manufacturing, from installation to service.

This commitment and dedication a the centerpieces as Rexnord Industries begins our next century of growth. We are taking on new challenges and opportunities with a fresh look on the future. Precision. Power. Performance.It’s more than a new slogan, it’s a promise – the Rexnord promise.

FlatTop Global’s Vision

To be the best in the world at continuously improving customers’ productivity through superior material handling solutions.

Rexnord Industries, LLC Mission

To be a leading marketer and world class manufacturer of precision motion technology products & systems and provide superior growth and command sustainable competitive advantage.

For pricing and delivery assistance contact Rexnord Customer Care at 866-REXNORD

4 INTRODuCTION / SAFETy CONSIDERATIONS6 ChAIN SElECTION Criteria Basic chain dimensions Specifying and part number nomenclature9 CARRy SECTION WEARSTRIpS Recommendations Edge Guide Dimensions Spacing14 RETuRN SECTION WEARSTRIpS Recommendations Edge Guide Dimensions and spacing16 DRIvE AND IDlER Sprocket dimensions and installation notes Sprocket locations Catenary and other setup notes21 AlTERNATIvE WEARSTRIpS Machined Curves Extruded Wearstrips22 ASSEMBly AND DISASSEMBly

CONTENTS

4


INTRODUCTION

The Rexnord® 7956 MatTop® chains are designed for the conveying industry’s most demanding applications. These chains provide numerous

benefits to the designer, builder, and the end user, including:

• Reduced total system cost through the ability for longer runs on a single drive

• Flexibility in applications and ease of setup based on the retention features of the chain

• Excellent product handling and low operational costs based on the proven Rexnord MatTop design

Available in 6 in (152.4 mm), 12 in (304.8 mm), 15 in (381.0 mm), 18 in (457.2 mm), 24 in (609.6 mm) and 30 in (762.00 mm) widths, the Rexnord 7956 MatTop chains are ideal for case handling applications as a substitute for roller, skate wheel, powered roller, powered belt, and line shaft conveyors. The 15 in (381.0 mm) wide chain is also a good substitute for dual-lane conveyors currently using 7.50 in (190.5 mm)

wide chains. Available sprocket sizes are 16 and 26 tooth.

The Rexnord 7956 MatTop chains include three retention types:

As explained later in the manual, each of these has applications for which it is most appropriate.

This manual outlines criteria for selecting the proper version of chain, and includes chain dimensions, basic conveyor design considerations, and installation recommendations. Following the suggestions outlined in this manual will ensure proper operation of the conveyor to provide the optimal product handling and optimum chain life. This manual contains information that is specific to the Rexnord 7956 MatTop chains and should be used in conjunction with the Rexnord Engineering manual (8rxEM-en).

No TAB GT (Guide TAB) B (Bearing)

5

SAFETY CONSIDERATIONS

PRODUCT SAFETY: products designed and manufactured by Rexnord are capable of being used in a safe manner; but

Rexnord cannot warrant their safety under all circumstances. PURCHASER MUST INSTALL AND USE THE PRODUCTS

IN SAFE AND LAWFUL MANNER IN COMPLIANCE WITH APPLICABLE HEALTH AND SAFETY REGULATIONS AND

LAWS AND GENERAL STANDARDS OF REASONABLE CARE; AND IF PURCHASER FAILS TO DO SO, PURCHASER

SHALL INDEMNIFY REXNORD FROM ANY LOSS, COST OR EXPENSE RESULTING DIRECTLY OR INDIRECTLY FROM

SUCH FAILURE.

SAFETY DEVICES: products are provided with only safety devices identified herein. IT IS THE RESPONSIBILITY OF

PURCHASER TO FURNISH APPROPRIATE GUARDS FOR MACHINERY PARTS in compliance with MSHA or OSHA

Standards, as well as any other safety devices desired by purchaser and/or required by law; and IF PURCHASER

FAILS TO DO SO, PURCHASER SHALL INDEMNIFY REXNORD FROM ANY LOSS, COST OR EXPENSE RESULTING

DIRECTLY OR INDIRECTLY FROM SUCH FAILURE.


6


Selection Criteria

The Rexnord® 7956 MatTop® RexFlex™ chains can handle all important applications requiring a side-flexing chain. Choosing the appropriate chain is based on two criteria:

• The length of pull to be accomplished by the chain, which is driven by the chain strength and the type of retention needed — TAB, No TAB or bearing

• Special handling characteristics around the curve

First, determine whether a bearing is required for the length of pull. The tables below show the acceptable range for different chain types. If the application requires the use of 7956B, a carbon steel bearing requiring no service or lubrication is standard. Stainless steel bearings are available on a made-to-order basis for applications requiring high pressure wash down or conveyor line lubrication.

Secondly, review the application to determine if any of the following special requirements apply:

Rexnord 7956GT MatTop Chain is most appropriate when:• Sliding packages on/off the chain from the side is needed

• Cleaning under the chain in the corner is required

Rexnord 7956 No TAB MatTop Chain is most appropriate when:• Capturing the chain on both the inside and the outside is needed

• The configuration of the wear surface would allow for interference with tabs or bearings

• The size or configuration of the support structure will not allow for the bearing or tab

CHAIN SELECTION

7


B

A A

D

EC

Basic Chain Dimensions

Rexnord® 7956B and 7956GT MatTop® Chain Recommended Chains and Corner Dimensions

Chain Number

Standard Width (K)

Side-flex Radius, Inside (IR)Chain Center Radius

(CR)Side-flex Radius, Outside

Radius (OR)

in (mm) in (mm) in (mm) in (mm)

7956B-6 6 152 12 305 15 381 18 457

7956B-12 12 305 24 610 30 762 36 914

7956B-15 15 381 30 762 37.5 953 45 1143

7956B-18 18 457 36 914 45 1143 54 1372

7956B-24 24 610 48 1219 60 1524 72 1829

7956B-30 30 762 60 1524 75 1905 90 2286

CHAIN SELECTION

Standard Width (K)

Side-flex Radius, Outside (OR)

Side-flex Radius, Inside (IR)

Chain Center Radius (CR)

Chain Pitch1.25 in

(31.8 mm)

Rexnord® 7956B MatTop® Chain

Rexnord® 7956GT MatTop® Chain

Chain Width

7956B 7956GT

Edge of chain to inside of bearing

Edge of chain to outside of bearing

Edge of chain to inside of TABEdge of chain to outside of

TAB

A B C D E

6 in 5.21 in. (132.3mm) 6.08 in (154.4mm) 5.27 in (133.9mm) 6.02 in (152.9mm)

12 in 11.17 in (283.7mm) 12.05 in (306.1mm) 11.23 in (285.2mm) 11.98 in (304.3mm)





8


CHAIN SELECTION

Specifying and Part Number Nomenclature

HP7956B-15-CCWChAIN

MATERIAl:

hp™ - (high performance Material)

ChAIN STylE:

7956 - No TAB7956GT - Guide TAB7956B - Bearing every other pitch

ChAIN WIDThS:

6 in12 in15 in18 in24 in30 in

TuRN DIRECTION:

Bearings or TABs are always on the outside of the curves

CCW - bearings or tabs on the right side of the chain, viewing in the direction of travel

CW - bearings or tabs on the left side of the chain, viewing in the direction of travel

STuRN - bearings or tabs on both sides of the chain

CCW CW STURN

9


CARRY SECTION WEARSTRIPS

General Recommendations for Corners and Straights • uhMWpE wearstrips are recommended

• If required for improved performance, nylon wearstrips may be used in the corners

• Recommended wearstrip thickness is 0.75 in (19.05 mm) minimum. Thicker wearstrips can be used if desired

• All sharp edges of wearstrips, including corner tracks, should be chamfered to ensure smooth chain movement. Recommended contact surface finish of wearstrips is 32 to 125 µ-in Ra (0.8 to 3.2 µ-m Ra) for best wear performance

• Inside edges of straight and corner sections should contain a lead-in or chamfer for a smooth transition

• If center wearstrips are required due to product loading, they can be staggered to distribute chain wear

• Offset rail, serpentine and chevron patterns are recommended to maximize chain life because they provide uniform wear across the full width of the chain.

• Refer to the engineering manual (8rxem-en) for more details on carry and return ways.

10


Edge Guide DimensionsThe Rexnord 7956B, 7956GT and 7956 No TAB MatTop Chain styles must be retained in the straights and curves with either a Rexnord Edge Guide shown below or an edge guide manfuactured as shown on pages 11-12.


Extruded Rexnord® 7956 Straight Guide• For use with Rexnord® 7956GT and 7956B MatTop® Chains

• Extruded anodized aluminum rail for strength

• Extruded uhMWpE strips for improved friction

• Mounts with standard carriage bolts

• Designed for smooth, quiet operation

• Sold in 10 ft (3.05 m) sections

Extruded Rexnord 7956 Curve Guide / Wearstrip• For use with Rexnord 7956GT and 7956B MatTop Chains


• Extruded uhMWpE strips for improved wear


• Curved guides are bent to match specific radii

• Contact Application Engineering for information needed to order curve sections



11



Edge Guide Dimensions The Rexnord® 7956B and 7956GT MatTop Chain styles must be retained in the corner with the type of edge guide shown. The bearing or guide TAB are retained

under the lip during operation.

The Rexnord 7956 No TAB MatTop Chain must be retained in the corner with a

pair of edge guides as shown.

TYP 2 in to 3 in(50 mm to 75 mm)

0.16 in(4.1 mm)

0.20

in(5

.1 m

m)

0.75

in M

in.

(19.

0 m

m M

in.)

Bearing or Guide TAB Edge Guide

0.63

in(1

6.0

mm

)

0.63 in Min.(16.0 mm)

No TAB “u” or “C” Edge Guide

12



Dimensions in Straights

The Rexnord® 7956B and 7956GT MatTop® Chains must be retained in the straight as shown if the section is more than 5 feet (1.5 m) long. Chain Guides are needed to stop the chain from moving side to side. If the distance in the straight is less than 5 feet (1.5 m), the tension in

the chain will keep it straight.

The Rexnord® 7956B and 7956GT MatTop Chain

must be retained with edge guide in the straight as shown.

0.25

in M

ax.

(7.0

mm

)

0.63 in Min.(16.0 mm)

No TAB “l” Guide Channel

TYP 4.00 in to 5.00 in(100 mm to 250 mm)


OR

1.00 in(25.4 mm)

0.75

in(1

9.1

mm

)

1.00

in(2

5.4

mm

)


Typical Carry configuration - Straight (7956 More Then 5.0 ft (1.5 m))


1.00 in(25.4 mm)



Typical Carry configuration - Straight (7956 Less Then 5.0 ft (1.5 m))

13


Spacing in Curves and Straights All wearstrips should be evenly spaced and the number required is based on the table below.

Wearstrip Quantities And locations Guide Clearance

Width Inside Middle Outside No Tab 7956B in an S-Curve 7956GT in an S-Curve

6 in 152.4 mm 1* 0 0 6.25 in 158.8 mm 4.25 in 108.0 mm 4.63 in 117.6mm

12 in 304.8 mm 1 1 1 12.25 in 311.2 mm 10.5 in 266.7 mm 10.63 in 270mm

15 in 381 mm 1 1 1 15.25 in 387.4 mm 13.5 in 342.9 mm 13.50 in 342.9mm

18 in 457.2 mm 1 2 1 18.25 in 463.6 mm 16.75 in 425.5 mm 16.50 in 419.1mm



* For 6 in (152.4 mm) wide chain, one full width wearstrip is used.


TYP 1.5 in to 3 in

(38 mm to 75 mm)

Outside of CurveInside of Curve Middle

For Bearing and Guide TAB Chain

TYP 1.5 in to 3 in (38 mm to 75 mm)

For No TAB Chain

Guide Clearance

(38 mm to 75 mm) (38 mm to 75 mm)Guide Clearance

0.75

in M

in.

(19.

0 m

m M

in.)

Outside of Curve Inside of Curve

TYP 1.5 in to 3 in TYP 1.5 in to 3 in

For Bearing or Guide TAB Chain in S-Curve

14


Edge Guide DimensionsThe Rexnord 7956B, 7956GT and 7956 No TAB MatTop Chain styles must be retained in the return section with either a Rexnord Return Guide shown below or a return guide manufactured as shown on pages 15-16.

RETURN SECTION WEARSTRIPS

Extruded Rexnord 7956 Return Guide• For use with all Rexnord® MatTop® Chains


• Extruded uhMWpE strips for improved wear




Return Shoe Assembly• For use with all Rexnord MatTop Chains

• Guides chain into extruded return guides

• uhMWpE shoe for smooth and quiet operation

• Includes mounting hardware for easy mounting to end of return guides

15


RETURN SECTION WEARSTRIPS

Spacing in Curves and Straights

Dim

ensi

on A

Dimension B

Guide Clearance

Suggested Return ConfigurationC-Channel profile

C-Channel Return Wearstrip Dimensions

Chain Number Dimension A Dimension B

7956 No TAB 0.75+/- 0.06 19.1 +/- 1.5 mm 0.63 +/- 0.13 16.0 +/- 3.3 mm

7956B or 7956GT 1.25+/- 0.06 31.8 +/- 1.5 mm 0.63 +/- 0.13 16.0 +/- 3.3 mm

Return Wearstrip

Dimensions Guide Clearance

Chain Width 7956B 7956GT, 7956 No TAB

6 in 6.25 in 158.8 mm 6.19 in 157.2 mm

12 in 12.25 in 311.2 mm 12.13 in 308.1 mm

15 in 15.19 in 385.8 mm 15.13 in 384.3 mm

18 in 18.19 in 462.0 mm 18.13 in 460.5 mm

24 in 24.19 in 614.4 mm 24.13 in 612.9 mm

30 in 30.25 in 768.4 mm 30.13 in 765.3 mm

General Recommendations for Corners and Straights• uhMWpE return tracks are recommended

• All sharp edges of return tracks should be chamfered to ensure smooth chain movement. Recommended contact surface finish of wearstrips is 32 to 125 µ-in Ra (0.8 to 1.6 µ-m Ra) for best wear performance

• Inside edges of straight and corner sections should contain a lead-in or chamfer for a smooth transition

• Center chain support is recommended for 24 in (762 mm) and 30 in (609.6 mm) wide chains

• Offset rail, serpentine and chevron patterns are recommended to maximize chain life because they provide uniform wear across the full width of the chain.

• Refer to the engineering manual (8rxem-en) for more details on carry and return ways.

16


DRIVE AND IDLER

Sprocket Dimensions and Installation Notes

• Sprocket to wearstrip dimensions are shown below

• When installing sprockets, make sure all of the sprocket faces are positioned the same way on the shaft, with all identification marks facing the same direction (as shown). The timing notches in the teeth should be lined up along the length of the shaft

DIRECTIONOF TRAVEL

1.25 in (31.8 mm)

3.46

in

(87.

7 m

m)

2.95

in

(75.

0 m

m)

Pitch Diam

eter

6.41 i

n

(162.7

mm)

Wrap Diameter

6.99 in

(177.7 mm)

DIRECTIONOF TRAVEL

1.25 in (31.8 mm)

5.44

in

(138

.1 m

m)

4.94

in

(125

.4 m

m)

Pitch Diameter

10.37 in

(263.4 mm)

Wrap

Diam

eter

10.93

in

(277.5

mm)

7956 on NS7956-26T Sprocket7956 on NS7956-16T Sprocket

Sprockets Installed IncorrectlySprockets Installed Correctly

17


DRIVE AND IDLER

Sprocket Location - 7956B, 7956GT and 7956 No TAB

The proper direction of travel can be determined in multiple ways:• Most eyes forward

• End eyes forward

• By the arrow molded into the Guide TAB

• using the drawings that follow

3.00 in(76.2 mm)

3.00 in(76.2 mm)

Sprocket pocket location for 7956-6 in Chainuse 1 sprocket per shaft

2.15 in(54.6 mm)

2.53 in(64.3 mm)

2.15 in(54.6 mm)

2.53 in(64.3 mm)

2.63 in(66.8 mm)

Sprocket pocket location for 7956-12 in Chainuse 4 sprockets per shaft

DIR

ECTI

ON

OF

TRAV

ELD

IREC

TIO

N O

FTR

AVEL

18


3.13 in(79.5 mm)

3.13 in(79.5 mm)

3.25 in(82.6 mm)

2.75 in(69.9 mm)

2.75 in(69.9 mm)


3.13 in(79.5 mm)

3.13 in(79.5 mm)

3.75 in(95.3 mm)

4.00 in(101.6 mm)

4.00 in(101.6 mm)


DRIVE AND IDLERD

IREC

TIO

N O

FTR

AVEL

DIR

ECTI

ON

OF

TRAV

EL

19


3.37 in(85.6 mm)

3.37 in(85.6 mm)

4.25 in(108.0 mm)

4.25 in(108.0 mm)

2.83 in(71.9 mm)

2.83 in(71.9 mm)

3.10 in(78.7 mm)


3.00 in(76.2 mm)

3.00 in(76.2 mm)

3.00 in(76.2 mm)

3.00 in(76.2 mm)

3.00 in(76.2 mm)

3.00 in(76.2 mm)

3.00 in(76.2 mm)

4.50 in(114.3 mm)

4.50 in(114.3 mm)


DRIVE AND IDLERD

IREC

TIO

N O

FTR

AVEL

DIR

ECTI

ON

OF

TRAV

EL

20


DRIVE AND IDLER

Catenary and Other Setup NotesThe design criteria that apply to standard Rexnord® TableTop® or MatTop® chains also apply to Rexnord 7956 MatTop chains. Criteria such as

wearstrip selection, lubrication, and catenary are the same as found in the Rexnord Engineering Manual (8rxEM-en).

• Minimum recommended straight section between the last corner and the drive shaft is 30 in (762.0 mm)

• Minimum recommended straight section between the first corner and the idler shaft is 9 in (228.6 mm)

• Carry wearstrips should end 1.25 in (31.8 mm)from the drive or tail shaft. (see drawing on page 16)

• The proper catenary is critical for performance, therefore catenary of 18 in to 24 inches (450 mm to 600 mm) is strongly recommended

• Return wearstrips should end 3 in to 6 in (75 mm to 125 mm) from bottom of tail sprockets

18 in to 24 in (450 mm to 600 mm)

3 in to 5 in (75 mm to 125 mm) When Running

3 in to 6 in(75 mm to 150 mm)

Chain Catenary

Min. Radius for Lead-in Shoe6.00 in

(152.4 mm)

Direction of Chain Travel

lead-in Return Shoe

21


Machined Curves

1.06

in(2

7.0

mm

)2.

17 in

(55.

0 m

m)

Inside Radiusof CurveCurve Width

using uhMWpE Corner Tracks for Rexnord 7956B MatTop Chain

Chain Width

Angle Curve WidthInside Radius

of ChainInside Radius

of CurveCode Number

6 in 90° 7.72 in 196 mm 12.01 in 305 mm 11.15 in 283.2 mm 808.40.00

12 in 90° 14.41 in 366 mm 24.02 in 610 mm 22.81 in 579.4 mm 808.40.01

15 in 90° 17.76 in 451 mm 30.00 in 762 mm 28.62 in 727.0 mm 808.40.02

18 in 90° 21.10 in 536 mm 36.02 in 915 mm 34.47 in 875.6 mm 808.40.03

24 in 90° 27.80 in 706 mm 48.03 in 1220 mm 46.13 in 1171.8 mm 808.40.04

30 in 90° 31.14 in 791 mm 60.00 in 1524 mm 59.43 in 1509.5 mm 808.40.05

using Nylon Corner Tracks for Rexnord 7956GT MatTop Chain

6 in 90° 7.72 in 196 mm 12.01 in 305 mm 11.15 in 283.2 mm 808.40.06

12 in 90° 14.41 in 366 mm 24.02 in 610 mm 22.81 in 579.4 mm 808.40.07

15 in 90° 17.76 in 451 mm 30.00 in 762 mm 28.62 in 727.0 mm 808.40.08

18 in 90° 21.10 in 536 mm 36.02 in 915 mm 34.47 in 875.6 mm 808.40.09

24 in 90° 27.80 in 706 mm 48.03 in 1220 mm 46.13 in 1171.8 mm 808.40.10

30 in 90° 31.14 in 791 mm 60.00 in 1524 mm 59.43 in 1509.5 mm 808.40.11

ALTERNATIVE WEARSTRIP

22


ASSEMBLY AND DISASSEMBLY

BEARING AND GUIDE TAB ATTACHMENTS:• Insert by hand

• To Remove: From the underside of the chain,insert a flat blade screwdriver under the bearing or tab attachment and rotate the screwdriver to remove the attachment.

END PLUGS:• Insert by hand

• To remove: From the underside of the chain, insert a flat blade screwdriver under the end plug and rotate the screwdriver to remove the plug, or use a needle nose pliers to push the plug out from the top

23


NOTES

World Class Customer ServiceFor more than 100 years, the dedicated people of Rexnord

have delivered excellence in quality and service to our

customers around the globe. Rexnord is a trusted name when

it comes to providing skillfully engineered products that

improve productivity and efficiency for industrial applications worldwide.

We are committed to exceeding customer

expectations in every area of our business: product design,

application engineering, operations, and customer service.

Because of our customer focus, we are able to thoroughly

understand the needs of your business and have the resources available

to work closely with you to reduce maintenance

costs, eliminate redundant inventories and prevent equipment down

time.

Rexnord represents the most comprehensive portfolio of power

transmission and conveying components in the world with the brands

you know and trust.

AUSTRALIA Rexnord Australia Pty Ltd Picton, New South Wales Phone: 61-2-4677-3811 Fax: 61-2-4677-3812 BRAZIL Rexnord Correntes Ltda. Sao Leopoldo - RS Phone: 55-51-3579-8022 Fax: 55-51-3579-8029 CANADA Rexnord Canada Ltd. Scarborough, Ontario Phone: 1-416-297-6868 Fax: 1-416-297-6873 CHINA Rexnord Conveyor Products (Wuxi) Co. Ltd. Shanghai Phone: 86-21-62701942 Fax: 86-21-627019433

FLATTOP EUROPERexnord FlatTop Europe b.v.‘s-Gravenzande, The NetherlandsPhone: 31-174-445-111Fax: 31-174-445-222

After Hours/Emergency Phone:31-174-445-112

Rexnord Marbett®, S.r.lCorreggio (RE), ItalyPhone: 39-0522-639333Fax: 39-0522-637778

RMCC Deutschland Kette GmbHPhone: 0800-5888083Fax: 0800-5888084

Rexnord FlatTop FrancePhone: 080 55 40 444Fax: 0805 54 05 55

MEXICOMecanica Falk, S. A. de C. V.Mexico DF, MexicoPhone: 52-55-9140-3500Fax: 52-55-9140-3550

UNITED STATESCustomer ServicePhone: 1-866-REXNORD(1-866-739-6673)Fax: 1-614-675-1898E-mail: rexnordcs(state)@rexnord.comExample: [email protected]

Rexnord FlatTop North AmericaGrafton, WisconsinPhone: 1-262-376-4700Fax: 1-262-376-4720

Rexnord International - Power TransmissionMilwaukee, WisconsinPhone: 1-414-643-2366Fax: [email protected]

ALL COUNTRIES NOT LISTEDRexnord FlatTop Europe b.v.‘s-Gravenzande, The NetherlandsPhone: 31-174-445-111Fax: 31-174-445-222

After Hours/Emergency Phone:31-174-445-112

INDIARexnord India Pvt LtdPune, IndiaPhone: 91-20-40160888

WORLDWIDE CUSTOMER SERVICE

8rx7956dm-en 10/09 Delzer litho printed in uSA

Rexnord,TableTop,andMatTopareregisteredtrademarks,andHPandRexFlexaretrademarksofRexnordIndustries,LLC.Allrightsreserved.

Rexnord FlatTop Europe b.v. [email protected] www.rexnordflattop.com

Rexnord FlatTop North America 1272 Dakota Drive Grafton, WI 53024 www.rexnord.com

p 262-376-4800 F 262-376-4720

© 2009 Rexnord Industries, llC

rexnord tabletop and mattop chains · 2014. 12. 13. · 4 for technical assistance contact rexnord...

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