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  Involute
Splines

 ANSI B92.1-1970
MAXIMUM TOLERANCE FOR SPACE WIDTH AND
TOOTH THICKNESS OF TOLERANCE
CLASS 5 SPLINES

P/Ps 2.5/5 and 3/6 4/8and 5/10 6/12 and 8/16 10/20 and 12/24 16/32 and 20/40 24/48 and 48/96 64/128 and 48/96 128/256
N Machining Tolerances, m
10
20
30
40		 15.8
17.6
18.4
21.8		 14.5
16.0
17.5
19.0		 12.5
14.0
15.5
17.0		 12.0
13.0
14.0
15.0		 11.7
12.4
13.1
13.8		 11.7
12.4
13.1
13.8		 9.6
10.2
10.8
11.4		 9.5
10.0
10.5
-
50
60
70
80		 23.0
24.8
-
-		 20.5
22.0
-
-		 18.5
20.0
-
-		 16.0
17.0
18.0
19.0		 14.5
15.2
15.9
16.6		 14.5
15.2
15.9
16.6		 -
-
-
-		 -
-
-
-
90
100		 -
-		 -
-		 -
-		 20.0
21.0		 17.3
18.0		 17.3
18.0		 -
-		 -
-
N Variation Allowance, Y
10
20
30
40		 23.5
27.0
30.5
34.0		 20.3
22.6
24.9
27.2		 17.0
19.0
21.0
23.0		 15.7
17.4
19.1
21.6		 14.2
15.4
16.6
17.8		 12.2
13.4
14.6
15.8		 11.0
12.0
13.0
14.0		 9.8
10.6
11.4
-
50
60
70
80		 37.5
41.0
-
-		 29.5
31.8
-
-		 25.0
27.0
-
-		 22.5
24.2
25.9
27.6		 19.0
20.2
21.4
22.6		 17.0
18.2
19.4
20.6		 -
-
-
-		 -
-
-
-
90
100		 -
-		 -
-		 -
-		 29.3
31.0		 23.8
25.0		 21.8
23.0		 -
-		 -
-
N Total Index Variation
10
20
30
40		 20
24
28
32		 17
20
22
25		 15
18
20
22		 15
17
19
20		 14
15
16
18		 12
13
15
16		 11
12
14
15		 10
11
13
-
50
60
70
80		 36
40
-
-		 27
30
-
-		 25
27
-
-		 22
24
26
28		 19
20
21
22		 17
18
20
21		 -
-
-
-		 -
-
-
-
90
100		 -
-		 -
-		 -
-		 29
31		 24
25		 23
24		 -
-		 -
-
N Profile Variation
ALL
 7
-10		 6
-8		 5
-7		 4
-6		 3
-5		 2
-4		 2
-4		 2
-4
For other tolerances classes:
  Class 4 = 0.71 x Tabulated value
  Class 5 = 0.00 x Tabulated value
  Class 6 = 1.40 x Tabulated value
  Class 7 = 2.00 x Tabulated value 		values in ten thousands
(20 = .002)