In an electric motor the housing directly determines heat dissipation, mechanical strength and service life. The two most common housing materials in industry are aluminum and cast iron, and the right choice depends on the load and the operating environment.

Aluminum-Housing Motors

Aluminum is light and conducts heat quickly, so it is advantageous in low-to-medium power applications where easy handling matters and vibration is limited. It is common in pumps, fans and light machine drives. However, it is not as durable as cast iron under impact and sustained heavy loads.

Cast-Iron-Housing Motors

Cast iron stands out for high mechanical strength, vibration damping and corrosion resistance. It delivers long life in crushers, stone-crushing plants, compressors and continuous heavy-duty service. DRG Motor uses high-quality cast iron housings on its motors from 0.55 kW upward.

Which Housing for Which Application?

Aluminum suits light loads, frequent handling and low power; cast iron is the right choice for heavy loads, impact, dust and demanding field conditions. For cooling, both housings support IP55 protection, class F insulation and continuous S1 duty.

Housing Choice at DRG Motor

We recommend the housing best matched to your load profile. Our cast iron series is built for heavy industry, while aluminum options offer cost and installation advantages in light applications.