8/11/2019 Parallel Keys is.2048.1983

1/9

UDC

621.88~8

Second Reprint

MARCH

1993

IS : 2048- 1983

Indian Standard

SPECIFICATION FOR

PARALLEL KEYS AND KEYWAYS

(

Second Revision /

I Scope-

Covers

the dimensions and tolerances for parallel keys and keyways.

.

Types -

The keys shall be of the following types:

Type A - Keys with both ends round.

Type B - Keys with both ends square.

Type C - Keys

with both ends round with hole for one retaining screw (for sizes 8 X7 and

upwards and for key lengths above the stepped line in Table 4 1.

Type D -

Keys with both ends square with hole for one retaining screw ( for sizes 8

X

7 and

upwards and for key lengths above the stepped line in Table 4 1.

Type E - a) Keys with both ends round with holes for two retaining screws

(

for sizes 8. X 7

and

10 x

8 and for key lengths below the stepped line in Table 4 ),

b) Additionally provided with tapped hole for one or two jacking screws for sizes

12 x 8 and upwards.

Type F - a) Keys with both ends square with holes for two retaining screws ( for sizes 8 x 7

and 10 x 8 and for key lengths below the stepped line in Table 4 ).

b) Additionally provided with tapped hole for one or two jacking screws for sizes

12 x 8 and upwards.

Type G - Keys with both ends square with chamfer and hole for one retaining screw.

Type H -

Keys with both ends square with chamfer and holes for two retaining screws.

Type J -

Keys with both ends square with chamfer and hole for one spring dowel sleeve.

Note-Types A, C and E are meant for machine tools application also,

3.

Dimensions

3.1 Keys

Dimensions for keys are given in Table 1 read with Fig, 1.

3.1.1 Retaining screws, jacking screws and spring dowel sleeves for keys are given in Table 2.

-

3.2

Keyways

Dimensions for keyways are given in Table 3.

3.3

Preferred length and weight of keys

Preferred length and weight of keys is given in Table 4.

4.

Designation -

designated as:

A parallel key of Type A, width 12 mm, height 8 mm and length 50 mm shall be

Parallel Key A 12 x 8 x 50

4.1 If keys of Types E and F from 12 x 8 size upwards are required to be supplied wiaout holes

for jacking screws ( OS ), this shall be stated when ordering.

In this case the designation for a key

of Type E, width 12 mm, height 8 mm and length 50 mm shall be as follows:

.

c

( Reaffirmed 1999 )

8/11/2019 Parallel Keys is.2048.1983

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^.

l S:2048 1983

N9

d

t

I

.,

P

hi SECTION XX

P

TYPE A

TYPE B

I--

SECTION YY

t

TYPE C

TYPE D

TYPE E

lb)

[*I

ib)

TYPE F

fi zzB

SECTION XX

@

SECTION YY

SECTION 2.2

SECTION 22

TYPE G TYPE H

SECTION VV

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I S : 2048 1983

TABLE 1 DIMENSIONS FOR KEYS

Clause 3.1 and Fig. I )

All dimensions in millimetres.

b

Tolon b h

Tol on h* a

s

Range of Key Length

Range of Key

h9

I

Length

for Machine

Tools Only )

-____~

_____~~~~ __

Min

Max

Min

Max

Min

Max

~~~ -

2

2 - 0.16

0.25 6

20 -

-

0

-

-- .

3 -0025

3 -to25 _ 0.16

025 6

36 -

-

- _

4

4 016

0.25 a

45 10

45

5 Jo30

5 -:.030 - 025

040 IO

56 I2

56

---

_ --

6

6 - 0.25

040 14

70 I6

70

3 7 3 025 o-40 I3 90 I 20 90

-_-

-~

IO -:*036

a 3 040

0.60 22

110 25

110

I2

a -co90 3 0

40

0.60

28

140 32

140

14

9 35 040

060 36

160 40

160

--

I6 Jo43

10 4 0.40

060 45

180 45

180

__ -- _____

ia

II 4.5 0.40

060 50

200 50

200

_ -. -

20

I2 5 0.60

0.80 56

220 56

220

22

I4 55 060

0.80

63

250 63

250

0 -

25 -to52

14

-omllo

55 060

0.80 70

280 70

250

__--

28

I6

65

060

0.80 a0

320 80

250

--

32

ia 7 060

0.80 90

360 90

250

36 20

a

100 120 100 400 100 250

40 0

-0062

22 9 100

120 110

400 110

250

--

45

25 -:.I30 10 100

120 125

400 -

-

Pm -____

50

28 11 100

1.20 140

400 -

-

____ .~-

56

32 13 I.60

2.00 160

400

-

-~

63

32 I3 160

200

180

400

-

70 -00~074 -- -

--

-:*I60

14 1.60

2.00 200

400 -

-

- -

--

80

40 16 250

300 220

400 -

-

-___

90

45

ia

250

3.00 250

400 -

-

o

-

100

-0.087

5.

20 250

3.00 280

400 -

-

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I S:2048; 1883

TABLE3 DI MENSI ONS FORKEYWAYS

(Cl ause 3.2)

Al l di mensi ons I n ml l i metres.

SECTi ON XX

DETAIL

T

A

Keyway

Keyway for Machi ne Tools

Appl i cati on

Tol on

h

TO

1.

TO

-____ on an

Runni ng f i t ight drive f l t

Force fi t

t, ta

on 0"

Shaft

Hub

Shaft Hub

Shaft andHub

1,

f .

H9

D O

N9 J s9

P9

- _ - - _ _ _- - - - - -

- - _%-

8

2x2 2

+0' 025

- 0' 004 f 00125

-0. 006 _

1'2 1'0

0' 08 0' 16

- - - -

s- o- 3x3 3 0 - 0' 029 - - 0' 0125

-~-

10 - - 12 4x4 4

0

12 17 5x5 5 +ro30

+0' 076

_

+0' 030

-0' 030

17 22 __ 6xs, 6

22 30 +0096 0

30 +0.040 - 0' 036

- _ - -

~-

36 44 12x8 / 1p

44 _50_ 14x9 14 f0' 120

_50_ - _ 58 16X10 16 +0. 050 $043

58 65 18x11 18

65 75 20x12 20

75 _85_ 22x14 22

+0, 149 0

ss- _93_ 25x14 25 +0' 065 - 0.052

- p-- 1 110

5 28x16

28

y- - -

+:' 06,

+0. 180 0

+0' 031 0

-0' 026

13' 0

+0'050 -0' 062 -0' 031 0 -0. 088 - -- -

15' 0 10' 4

0.70

1' 00

, - - _

___ ___

380 440

90x45

I 90

__ _ _ __~ .__ _ +0' 087

440 500 100x50 100 0 ; : : : ; : 1 -;.,,87 ;:;:;;

-

z

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IS : 2048 1983

TABLE 4

PREFERRED LENGTH AND wmm F KEYS

Chose.3

Preferred

Length

( ' )mm 1 2x2 / 3x3 1 4x4 ) 5x5 ) ' 6x6 i

Key(bxh), mm

6x7 / 10x6 / '2x8 / ,4x9 ) ,6X,0 j 18x.U 1 *0X,2 ) 22x14 / 26x14 I .* BX 6 1 32x18 / 36x20 1 40x22 / 45x25 / 50x28 66x32 163x32 j 70x36 1 80x40 1;

I

,

I

*WeightorKeys Type B,kgltWO Pieces ( APPW )

- - -

--

__E?_-

__ -' __

Note-For machi ne toolsappll cati on for keys bxh ),4x410 40x22 preferr ed l ength /) rangesrom IO to 250.

*For calcul ati ons of weights, density of steel taken as 7' 85 o/cm .

6

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AMENJ MENT NO. 1 SEPTEMBER 1986

TO

I S: 2048- 19133 SPECI FI CATI ON FOR PARALLEL KEYS

ANI KEYWAYS

Second evision)

Azge 7, cZause 6) -

Delete clause 6 al ong

with figure ard informal table

EDC 44)

Printed at Simco Printing Press Delhi lndla

8/11/2019 Parallel Keys is.2048.1983

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AMENDMENT NO 2 OCTOBER 2 5

TO

IS 2 48:1983 SPECIFICATION FOR PARALLEL KEYS AND KEYWAYS

S ec on d Rev i o n )

[ Page 7 , c l a u se 6 see also Amendment No 1 ]

I n ser t t he follow in g n ew cla u se 6 a f ter 5:

6 E RROR OF SYMME TRY AND P ARALLELISM

Diamet er of Above 10 12 17 22 30 38 44 50 58 65 75 85 95 110 130

Sha f t

up t o

12 17 22

30 38 44 50 58 65

75 85 95 110

130 150

b

4 5 6

8 10 12 14 16 18

20 22 25 28 32

36

.Y

0.1

0.16

0.2

0.3

0.4

P G30

ReprographyUnit IS New Delhi India