Related Resources: belt design

Synchronous Timing Belt Lengths and Tolerances per. ANSI RMA IP-24, ISO 5299 and IS 9804

Belt Drive Design and Engineering
Mechanical Gear Design and Engineering

Synchronous Timing Belt Standard Pitch Lengths and Tolerances per. ANSI RMA IP-24, ISO 5299 and IS 9804.

Related:

The pitch length of a synchronous belt is determined by placing the belt on a measuring fixture having two pulleys of equal diameter, a method of applying force, and a means of measuring the center distance between the two pulleys. The position of one of the two pulleys is fixed and the other is movable along a graduated scale.

Synchronous Timing Belt Standard

All dimensions are given in inch units

Synchronous Belt Standard Pitch Lengths and Tolerances ANSI/RMA IP-24

Belt Length
Designation
Pitch
Length
Permissible Deviation
From
Standard Length
Number of Teeth for
Standard Lengths
MXL
(0.080)
XL
(0.200)
L
(0.375)
H
(0.500)
XH
(0.875)
XXH
(1.250)
36
40
44
48
56
3.600
4.000
4.400
4.800
5.600
±0.016
±0.016
±0.016
±0.016
±0.016
45
50
55
60
70




















60
64
70
72
80
6.000
6.400
7.000
7.200
8.000
±0.016
±0.016
±0.016
±0.016
±0.016
75
80

90
100
30

35

40
















88
90
100
110
112
8.800
9.000
10.000
11.000
11.200
±0.016
±0.016
±0.016
±0.018
±0.018
110

125

140

45
50
55












...



120
124
124
130
140
12.000
12.375
12.400
13.000
14.000
±0.018
±0.018
±0.018
±0.018
±0.018


155

175
60
...
...
65
70
...
33
...
...
...
...



...







150
160
170
180
187
15.000
16.000
17.000
18.000
18.750
±0.018
±0.020
±0.020
±0.020
±0.020

200

225
75
80
85
90
...
40
...
...
...
50












190
200
210
220
225
19.000
20.000
21.000
22.000
22.500
±0.020
±0.020
±0.024
±0.024
±0.024

250


95
100
105
110
...
...
...
56
...
60












 

Belt Length
Designation
Pitch
Length
Permissible Deviation
From
Standard Length
Number of Teeth for
Standard Lengths
MXL
(0.080)
XL
(0.200)
L
(0.375)
H
(0.500)
XH
(0.875)
XXH
(1.250)
230
240
250
255
260
23.000
24.000
25.000
25.500
26.000
±0.024
±0.024
±0.024
±0.024
±0.024




112
120
125
...
130
...
64
...
68
...
...
48










270
285
300
322
330
27.000
28.500
30.000
32.250
33.000
±0.024
±0.024
±0.024
±0.026
±0.026








72
76
80
86
...
54
...
60
...
66








345
360
367
390
420
34.500
36.000
36.750
39.000
42.000
±0.026
±0.026
±0.026
±0.026
±0.030








92
...
98
104
112
...
72
...
78
84








450
480
507
510
540
45.000
48.000
50.750
51.000
54.000
±0.030
±0.030
±0.032
±0.032
±0.032








120
128
...
136
144
90
96
...
102
108
 




560
570
600
630
660
56.000
57.000
60.000
63.000
66.000
±0.032
±0.032
±0.032
±0.034
±0.034








...
...
160
...
...
...
114
120
126
132
 




700
750
770
800
840
70.000
75.000
77.000
80.000
84.000
±0.034
±0.036
±0.036
±0.036
±0.038












140
150
...
160
...
 
 

References:

ANSI / RMA IP-24
ISO 5299
IS 9804

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