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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