Stone-crushing and aggregate plants present one of the harshest environments an electric motor can face: high breakaway torque, sudden load swings, constant vibration and heavy dust. For jaw crushers, impact crushers, vibrating screens and conveyor drives, DRG Motor's cast iron, IP55-rated motors are selected to withstand these conditions.

High Torque for Crusher Drives

When jaw and cone crushers start under full load, the motor must deliver high breakaway torque. Crusher motors are therefore usually specified as 4- or 6-pole (1500/1000 rpm); the lower speed gives more torque and a steadier drive. Flywheel mass absorbs sudden shock loads and protects the motor.

Protection Against Dust and Vibration

The fine rock dust in a plant is abrasive to bearings and windings. IP55 protection seals the interior against dust and splashing water, while Class F insulation and a cast iron frame extend life under high temperature and vibration. Terminal-box gaskets and correct bearing selection are critical in this setting.

Choosing a Motor for the Plant

When specifying a motor for a crushing plant, power (kW), speed, mounting type and protection rating are matched to the equipment maker's figures. DRG Motor offers heavy-duty motors from 5.5 kW to 355 kW in the IE3 efficiency class, combining uninterrupted production with reasonable energy use.

Reducing Unplanned Downtime

On a crushing line, an unexpected motor failure halts all production. A correctly sized motor with quality bearings and adequate cooling runs steadily even under heavy load. Keeping a spare motor in stock makes it possible to bring the line back quickly when a fault occurs.