WP reducer power input power calculation (reference - single-stage 1500 r/min)

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Output Torque by Frame Size (Reference – Single Stage)

Frame Size	Output Torque Range (N·m)

40	19 – 25
60	31 – 39
70	50 – 75
80	83 – 113
90	113 – 151
100	193 – 291
120	262 – 413
135	540 – 707
147	566 – 739
155	709 – 848
175	958 – 1221
200	1280 – 1782
250

Torque varies by ratio – lower ratios deliver higher torque

Key Materials & Construction

●Housing: High-strength cast iron (HT250)

●Worm Shaft: 45# high-quality steel, heat-treated

●Worm Wheel: Tin bronze casting

Input Speed Limit

Maximum worm shaft speed: 1,500 r/min – exceeding this limit accelerates wear and reduces service life.

Selection Quick Reference

When selecting a WP series reducer:

1. Determine required ratio – i = Input Speed / Output Speed

2. Calculate load torque – ensure rated torque ≥ your requirement

3. Select frame size – based on torque capacity from specification table

4. Verify input power – motor power must not exceed reducer's thermal rating

5. Choose mounting configuration – WPA/WPS/WPO/WPX/WPDA/WPDS/WPW

Need help selecting the right model? Send us your motor power, required output speed, load torque, and mounting preference – our engineering team responds within 24 hours.