Cast iron framed electric motors rated at 37 kW, equivalent to about 50 HP, form a class that is frequently chosen for medium and heavy industrial drives. At this output the cast iron housing offers a clear advantage in mechanical strength and thermal stability.

Typical Operating Figures of a 37 kW Motor

A four-pole 37 kW motor on a 400 V / 50 Hz supply turns close to 1500 rpm synchronous speed and draws roughly 48 A at full load. Rated torque depends on speed and is around 235 Nm at 1500 rpm, while the two-pole variant gives higher speed and lower torque.

What the Cast Iron Frame Adds

A cast iron frame is stiffer than aluminium and keeps the bearing centres aligned, reducing vibration. This extends bearing life, lowers noise and keeps the motor at a steadier temperature under continuous load. On shock-loaded drives the difference is clearly noticeable.

Areas of Use

37 kW cast iron motors are used on crushers, large fans, high-flow pumps, conveyor lines and geared mixers. IP55 protection and class F insulation support continuous S1 operation in dusty and humid environments.

Choosing the Right 37 kW Motor

Speed, mounting type (B3/B5) and efficiency class (IE3/IE4) should be matched to the load profile. DRG Motor supplies cast iron models from 0.55 to 355 kW; contact the company for a 37 kW motor suited to your application and a current quotation.