Horsepower Ratings Roller Chain No. 25 Table 1/4 inch

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Horsepower Ratings Roller Chain No. 25 Table 1/4 inch

ANSI Hardware Design Guide and Reference

Horsepower Ratings for ANSI Roller Chains Table For Standard Single-Strand Roller Chain Number 25

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 ]

1⁄4-inch Pitch Standard Single-Strand Roller Chain — No. 25

No. of Teeth Small Sprocket	Revolutions per Minute of Small Sprocket a
	50	100	300	500	700	900	1200	1500	1800	2100	2500	3000	3500
	Horsepower Rating
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 28 30 32 35 40 45	0.03 0.03 0.04 0.04 0.04 0.04 0.05 0.05 0.05 0.06 0.06 0.06 0.06 0.07 0.07 0.07 0.08 0.08 0.09 0.10 0.12 0.13	0.05 0.06 0.06 0.07 0.08 0.08 0.09 0.09 0.10 0.10 0.11 0.11 0.12 0.13 0.13 0.14 0.15 0.16 0.17 0.19 0.22 0.25	0.14 0.16 0.17 0.19 0.20 0.22 0.23 0.25 0.26 0.28 0.29 0.31 0.32 0.34 0.35 0.37 0.40 0.43 0.46 0.51 0.58 0.66	0.23 0.25 0.27 0.30 0.32 0.34 0.37 0.39 0.41 0.44 0.46 0.48 0.51 0.53 0.56 0.58 0.63 0.68 0.73 0.80 0.92 1.05	0.31 0.34 0.37 0.40 0.43 0.47 0.50 0.53 0.56 0.59 0.62 0.66 0.69 0.72 0.75 0.79 0.85 0.92 0.98 1.08 1.25 1.42	0.39 0.43 0.47 0.50 0.54 0.58 0.62 0.66 0.70 0.74 0.78 0.82 0.86 0.90 0.94 0.98 1.07 1.15 1.23 1.36 1.57 1.78	0.50 0.55 0.60 0.65 0.70 0.76 0.81 0.86 0.91 0.96 1.01 1.07 1.12 1.17 1.22 1.28 1.38 1.49 1.60 1.76 2.03 2.31	0.62 0.68 0.74 0.80 0.86 0.92 0.99 1.05 1.11 1.17 1.24 1.30 1.37 1.43 1.50 1.56 1.69 1.82 1.95 2.15 2.48 2.82	0.73 0.80 0.87 0.94 1.01 1.09 1.16 1.24 1.31 1.38 1.46 1.53 1.61 1.69 1.76 1.84 1.99 2.15 2.30 2.53 2.93 3.32	0.83 0.92 1.00 1.08 1.17 1.25 1.33 1.42 1.50 1.59 1.68 1.76 1.85 1.94 2.02 2.11 2.29 2.46 2.64 2.91 3.36 3.82	0.98 1.07 1.17 1.27 1.36 1.46 1.56 1.66 1.76 1.86 1.96 2.06 2.16 2.27 2.37 2.47 2.68 2.88 3.09 3.41 3.93 4.47	1.15 1.26 1.38 1.49 1.61 1.72 1.84 1.96 2.07 2.19 2.31 2.43 2.55 2.67 2.79 2.91 3.15 3.40 3.64 4.01 4.64 5.26	1.32 1.45 1.58 1.71 1.85 1.98 2.11 2.25 2.38 2.52 2.66 2.79 2.93 3.07 3.21 3.34 3.62 3.90 4.18 4.61 5.32 6.05
	Type A				Type B