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Roller Chain No 41 Horsepower and Speed Ratings

ANSI Hardware Design Guide and Reference

Horsepower Ratings for ANSI Roller Chains Table For 1/2" Pitch Light Weight Machinery Roller Chain No. 41

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 ]

Number
of
Teeth
Small
Sprocket
1/2" Pitch Light Weight Machinery Roller Chain No. 41
Revolutions per Minute — Small Sprocket
10
25
50
100
200
300
400
500
700
900
1000
1200
1400
Horsepower Rating
11
0.03
0.07
0.13
0.24
0.44
0.64
0.82
1.01
1.37
1.71
1.88
1.71
1.36
12
0.03
0.07
0.14
0.26
0.49
0.70
0.91
1.11
1.50
1.88
2.07
1.95
1.55
13
0.04
0.08
0.15
0.28
0.53
0.76
0.99
1.21
1.63
2.05
2.25
2.20
1.75
14
0.04
0.09
0.16
0.31
0.57
0.83
1.07
1.31
1.77
2.22
2.44
2.46
1.95
15
0.04
0.09
0.18
0.33
0.62
0.89
1.15
1.41
1.91
2.39
2.63
2.73
2.17
16
0.04
0.10
0.19
0.36
0.66
0.95
1.24
1.51
2.05
2.57
2.82
3.01
2.39
17
0.05
0.11
0.20
0.38
0.71
1.02
1.32
1.61
2.18
2.74
3.01
3.29
2.61
18
0.05
0.12
0.22
0.40
0.75
1.08
1.40
1.72
2.32
2.91
3.20
3.59
2.85
19
0.05
0.12
0.23
0.43
0.80
1.15
1.49
1.82
2.46
3.09
3.40
3.89
3.09
20
0.06
0.13
0.24
0.45
0.84
1.21
1.57
1.92
2.60
3.26
3.59
4.20
3.33
21
0.06
0.14
0.26
0.48
0.89
1.28
1.66
2.03
2.74
3.44
3.78
4.46
3.59
22
0.06
0.14
0.27
0.50
0.93
1.35
1.74
2.13
2.89
3.62
3.98
4.69
3.85
23
0.06
0.15
0.28
0.53
0.98
1.41
1.83
2.24
3.03
3.80
4.17
4.92
4.11
24
0.07
0.16
0.29
0.55
1.03
1.48
1.92
2.34
3.17
3.97
4.37
5.15
4.38
25
0.07
0.17
0.31
0.57
1.07
1.55
2.00
2.45
3.31
4.15
4.57
5.38
4.66
26
0.07
0.17
0.32
0.60
1.12
1.61
2.09
2.55
3.46
4.33
4.76
5.61
4.94
28
0.08
0.19
0.35
0.65
1.21
1.75
2.26
2.77
3.74
4.69
5.16
6.08
5.52
30
0.08
0.20
0.38
0.70
1.31
1.88
2.44
2.98
4.03
5.06
5.56
6.55
6.13
32
0.09
0.22
0.40
0.75
1.40
2.02
2.61
3.20
4.33
5.42
5.96
7.03
6.75
35
0.10
0.24
0.44
0.83
1.54
2.22
2.88
3.52
4.76
5.97
6.57
7.74
7.72
40
0.12
0.27
0.51
0.96
1.78
2.57
3.33
4.07
5.50
6.90
7.59
8.94
9.43
45
0.14
0.31
0.58
1.08
2.02
2.92
3.78
4.62
6.25
7.84
8.62
10.2
11.3
Type A
Type B
Type C

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