Horsepower Ratings ANSI Roller Chain No 100 Table

ANSI Hardware Design Guide and Reference

Horsepower Ratings for ANSI Roller Chains Table For 1 - 1/4 " Pitch Standard Single Strand Roller Chain No. 100

To determine the horsepower requirements for Roller Chains the following must be taken into consideration:

  • Service factors,
  • Lubrication Service Factors,
  • Multiple Strand Factors: For two strands, the multiple strand factor is 1.7; for three strands, it is 2.5; and for four strands, it is 3.3.,
  • Lubrication: Required type of lubrication is indicated at the bottom of each roller chain size section of the table,
  • Type A: Manual or Drip Lubrication, Type B: Bath or Disc Lubrication, Type C: Oil Stream Lubrication.

To find the required horsepower table rating, use the following formula:

HP Required = [ HP to be Transmitted ] x [ Service Factor ] / [ Multiple Strand Factor ]

No.
of
Teeth
Small
Sprocket
1 - 1/4" Pitch Standard Single Strand Roller Chain No. 100
Revolutions per Minute - Small Sprocket
10
25
50
100
150
200
300
400
500
600
700
800
900
Horsepower Rating
11
0.81
1.85
3.45
6.44
9.28
12.0
17.3
22.4
27.4
32.3
37.1
32.8
27.5
12
0.89
2.03
3.79
7.08
10.2
13.2
19.0
24.6
30.1
35.5
40.8
37.3
31.3
13
0.97
2.22
4.13
7.72
11.1
14.4
20.7
26.9
32.8
38.7
44.5
42.1
35.3
14
1.05
2.40
4.48
8.36
12.0
15.6
22.5
29.1
35.6
41.9
48.2
47.0
39.4
15
1.13
2.59
4.83
9.01
13.0
16.8
24.2
31.4
38.3
45.2
51.9
52.2
43.7
16
1.22
2.77
5.17
9.66
13.9
18.0
26.0
33.6
41.1
48.4
55.6
57.5
48.2
17
1.30
2.96
5.52
10.3
14.8
19.2
27.7
35.9
43.9
51.7
59.4
63.0
52.8
18
1.38
3.15
5.88
11.0
15.8
20.5
29.5
38.2
46.7
55.0
63.2
68.6
57.5
19
1.46
3.34
6.23
11.6
16.7
21.7
31.2
40.5
49.5
58.3
67.0
74.4
62.3
20
1.55
3.53
6.58
12.3
17.7
22.9
33.0
42.8
52.3
61.6
70.8
79.8
67.3
21
1.63
3.72
6.94
13.0
18.7
24.2
34.8
45.1
55.1
65.0
74.6
84.2
72.4
22
1.71
3.91
7.30
13.6
19.6
25.4
36.6
47.4
58.0
68.3
78.5
88.5
77.7
23
1.80
4.10
7.66
14.3
20.6
26.7
38.4
49.8
60.8
71.7
82.3
92.8
83.0
24
1.88
4.30
8.02
15.0
21.5
27.9
40.2
52.1
63.7
75.0
86.2
97.2
88.5
25
1.97
4.49
8.38
15.6
22.5
29.2
42.0
54.4
66.6
78.4
90.1
102
94.1
26
2.05
4.68
8.74
16.3
23.5
30.4
43.8
56.8
69.4
81.8
94.0
106
99.8
28
2.22
5.07
9.47
17.7
25.5
33.0
47.5
61.5
75.2
88.6
102
115
112
30
2.40
5.47
10.2
19.0
27.4
35.5
51.2
66.3
81.0
95.5
110
124
124
32
2.57
5.86
10.9
20.4
29.4
38.1
54.9
71.1
86.9
102
118
133
136
35
2.83
6.46
12.0
22.5
32.4
42.0
60.4
78.3
95.7
113
130
146
156
40
3.27
7.46
13.9
26.0
37.4
48.5
69.8
90.4
111
130
150
169
188
45
3.71
8.47
15.8
29.5
42.5
55.0
79.3
103
126
148
170
192
213
Type A
Type B
Type C
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