Construction machinery and heavy industrial equipment—crushers, presses, cranes and mixers—involve high-starting-torque, shock and vibration loads. For these applications DRG Motor builds cast iron frame three-phase motors with high starting torque across the 0.55–355 kW range.

Demands of Heavy-Duty Conditions

In construction machinery the motor faces sudden load changes and constant vibration. Mechanical strength comes first here: a cast iron frame, reinforced bearings and IP55 protection limit the effect of dust, mud and moisture, reducing stoppages.

Torque and Pole Count

Loads such as crushers and mixers need high starting torque. 4-pole 1500 rpm and 6-pole 1000 rpm models provide both sufficient torque and controlled speed in these applications. The load profile is the basis of the right pole choice.

Insulation and Thermal Endurance

In motors that heat up under heavy load, Class F insulation and effective cooling protect winding life. When IE3 is chosen for lines running under S1 continuous duty, energy savings are added to durability.

Choosing the Right Heavy-Duty Motor

Selection for a machinery motor starts with load torque, duty cycle and mounting type. Based on this application data, DRG Motor recommends the suitable power, speed and frame, supporting field continuity with spare parts and technical service.