INTRODUCTION
This relationship is often useful since the normal maximum allowable chain wear elongation of
3 %
is valid only up to
67 teeth in the large sprocket. In drives having fixed center distances, chains running in parallel or where smoother
operation is required, wear should be limited to approximately
1.5 %
.
For example, if 40 pitches (40 pins) of a #40 chain were measured and the result was
523 mm
(
20.6 in
) or greater
(using
3 %
as the maximum allowable wear), the chain should be replaced. Anything less than
523 mm
(
20.6 in
)
would still be acceptable by most industrial standards.
WEAR LIMITS ON ROLLER CHAIN
No. 40 Chain
(08A)
No. 50 Chain (10A) No. 60 Chain (12A) No. 80 Chain (16A)
Strand
Length
in
Pitches
New
Replace
New
Replace
New
Replace
New
Replace
40P
508 mm
(
20.0 in
)
523 mm
(
20.6 in
)
635 mm
(
25.0 in
)
654 mm
(
25.7 in
)
762 mm
(
30.0 in
)
787 mm
(
31.0 in
)
1016 mm
(
40.0 in
)
1047 mm
(
41.2 in
)
50P
635 mm
(
25.0 in
)
654 mm
(
25.7 in
)
793 mm
(
31.2 in
)
817 mm
(
32.2 in
)
952 mm
(
37.5 in
)
981 mm
(
38.6 in
)
1270 mm
(
50.0 in
)
1308 mm
(
51.5 in
)
60P
762 mm
(
30.0 in
)
784 mm
(
30.9 in
)
952 mm
(
37.5 in
)
981 mm
(
38.6 in
)
1143 mm
(
45.0 in
)
1177 mm
(
46.3 in
)
1524 mm
(
60.0 in
)
1568 mm
(
61.7 in
)
70P
889 mm
(
35.0 in
)
914 mm
(
36.0 in
)
1111 mm
(
43.7 in
)
1144 mm
(
45.0 in
)
1333 mm
(
52.5 in
)
1371 mm
(
54.0 in
)
1778 mm
(
70.0 in
)
1828 mm
(
72.0 in
)
80P
1016 mm
(
40.0 in
)
1047 mm
(
41.2 in
)
1270 mm
(
50.0 in
)
1308 mm
(
51.5 in
)
1524 mm
(
60.0 in
)
1568 mm
(
61.7 in
)
2032 mm
(
80.0 in
)
2095 mm
(
82.5 in
)
90P
1143 mm
(
45.0 in
)
1177 mm
(
46.3 in
)
1428 mm
(
56.2 in
)
1473 mm
(
58.0 in
)
1714 mm
(
67.5 in
)
1765 mm
(
69.5 in
)
2286 mm
(
90.0 in
)
2355 mm
(
92.7 in
)
100P
1270 mm
(
50.0 in
)
1308 mm
(
51.5 in
)
1578 mm
(
62.1 in
)
1635 mm
(
64.4 in
)
1905 mm
(
75.0 in
)
1962 mm
(
77.2 in
)
2540 mm
(
100.0 in
)
2616 mm
(
103.0 in
)
STANDARD ROLLER CHAIN SIZES - NEW CHAINS
Chain No.
150 Chain No.
Pitch
Width
Roller Diameter
40
08A
12.7 mm
(
0.5 in
)
7.9 mm
(
0.3 in
)
7.9 mm
(
0.3 in
)
50
10A
15.8 mm
(
0.6 in
)
9.5 mm
(
0.4 in
)
10.1 mm
(
0.4 in
)
60
12A
19 mm
(
0.7 in
)
12.7 mm
(
0.5 in
)
11.9 mm
(
0.5 in
)
80
16A
25.4 mm
(
1.0 in
)
15.8 mm
(
0.6 in
)
15.8 mm
(
0.6 in
)
100
20A
31.7 mm
(
1.2 in
)
19 mm
(
0.7 in
)
19 mm
(
0.7 in
)
120
24A
38.1 mm
(
1.5 in
)
25.4 mm
(
1.0 in
)
22.2 mm
(
0.9 in
)
140
28A
44.4 mm
(
1.7 in
)
25.4 mm
(
1.0 in
)
25.4 mm
(
1.0 in
)
160
32A
50.8 mm
(
2.0 in
)
31.7 mm
(
1.2 in
)
28.5 mm
(
1.1 in
)
180
*
57.1 mm
(
2.2 in
)
35.7 mm
(
1.4 in
)
35.7 mm
(
1.4 in
)
200
40A
63.4 mm
(
2.5 in
)
38.1 mm
(
1.5 in
)
39.6 mm
(
1.6 in
)
* No. 150 Number does not exist.
47956065 17/05/2016
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