Custom electric motor types require the frame, mounting, speed and efficiency class to be selected together so the unit fits each business's particular load profile, operating environment and installation. Because no single motor suits every application, the choice becomes an engineering decision.

Types by Mounting Arrangement

The mounting form drives the application: a B3 foot-mounted frame suits classic floor-bolted installations, a B5 flange-mounted frame fits systems coupled directly to a pump or gearbox, and a B14 face-mounted frame is used in compact machines in tight spaces. The right mounting affects mechanical alignment and vibration behaviour.

Speed and Power Options

On a 50 Hz supply the speed depends on the number of poles: 2 poles 3000 rpm for high-speed pumps and fans, 4 poles 1500 rpm for general-purpose use, and 6 poles 1000 rpm for high-torque conveyors and crushers. Power is set by the application load, from 0.55 kW up to 355 kW.

Efficiency and Protection by Environment

IP55 protection is chosen for dusty and humid settings, Class F insulation for high temperature and S1 duty for continuous running. Plants seeking lower energy cost opt for the IE3 Premium or IE4 Super Premium efficiency class; a cast iron frame is considered for heavy load and vibration, and an aluminium frame for lighter applications.

Choosing the Right Motor

The Izmir-based supplier DRG Motor delivers solutions by matching power, speed, frame and efficiency class to the needs of different sectors. Share your application's load profile, ambient conditions and mounting form, and you can obtain a current quotation for the best-suited motor.