Stone crushing and screening plants stress the motor with an impact-laden, fluctuating load as they turn raw rock into aggregate. A large block entering the crusher creates sudden torque surges, while the eccentric vibration of the screening unit constantly shakes the bearings. The electric motor chosen for this line must deliver high starting torque and survive years in a dusty, vibrating environment. DRG Motor builds rugged-frame motors for these heavy industrial conditions.

Crusher Versus Screen Load

Jaw and cone crushers demand brief bursts of high torque at the instant of crushing, so the motor needs a high breakdown torque and starting capacity. Vibrating screens, by contrast, run under a constant unbalanced load. Both cases call for S1 continuous duty and a robust shaft design.

Speed and Power Range

Because torque dominates in primary crushing stages, 6-pole 1000 rpm motors are preferred there, while 4-pole 1500 rpm units are common for screening and conveyor drives. Depending on plant capacity, power ranges from 30 kW up to 355 kW on a 400 V / 50 Hz supply.

Dust, Impact and Insulation

IP55 protection is essential against the dense stone dust of a quarry. The cast iron frame absorbs the shock impacts and vibration produced by the crusher. Class F insulation leaves a safe margin against the rising winding temperature under heavy load, preserving the motor's service life.

The Right Drive for Your Crushing Plant

Correct selection means addressing the crusher's torque profile and the plant's daily run time together. DRG Motor supplies foot-mounted (B3) heavy-duty motors in IE3 and IE4 efficiency classes from its İzmir warehouse; we can define together the solution matched to your crushing and screening line.