For the past few decades, most motors have been cast iron motors. Their motor housing is highly durable, withstands external pressure well, and is not prone to deformation.

Low price, suitable for use in places with high driving power and poor environment. However, it's heavy and has poor thermal conductivity; not suitable for die casting, with poor plasticity and low elongation; also noisy and lacks stability.

With the advancement of technology, an increasing number of motors are made with aluminum. The advantages of aluminum alloy die castings include light weight, excellent heat dissipation, good thermal conductivity, castability, high plasticity, elongation higher than iron, low noise, and good motion stability. The drawbacks are high cost and low hardness, making them suitable for installations where minimal force is required.

Motors with aluminum casings are typically used for stable operations, powered by DC, with high speeds and installed in areas not requiring much force. Aluminum is soft, making the aluminum casing lighter than iron, better for heat conduction, castable, highly malleable, with higher elongation than iron, but higher in price and lower in hardness.

Considerations for using an aluminum housing for a small motor include:

The density of aluminum is relatively low, which can reduce the overall weight of the machine.

2. Aluminum has better thermal conductivity than iron, which is beneficial for motor heat dissipation.

3. Aluminum has low strength, making it easy to process and manufacture, thus saving processing costs.