When to Use cast iron Electric Motor Housing？

Aluminum motor is different from cast iron motor

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If you can’t decide whether to use aluminum motor or cast iron motor, let’s take a look at the difference between the two materials.

Aluminum shell motor: the material used is aluminum, the advantages are light weight, good heat dissipation performance, good thermal conductivity, can die casting, plasticity can be good, elongation is higher than iron, low noise, good stability of action, the disadvantage is high price, low hardness, suitable device in the place without a lot of effort.

Cast iron motor: the motor shell is made of cast iron, which has the advantages of high hardness, high resistance to external pressure, easy deformation, low price, and can be installed in some places where driving force is large and the environment is poor.The disadvantage is that the weight is bulky, poor thermal conductivity, can not be die-casting, plasticity can not be good, elongation is lower than aluminum.Noise, stability is not as good as aluminum.

What are the advantages and disadvantages of aluminum casing and cast iron casing for motor?

Aluminum Motor: 

Advantages:light weight, good heat dissipation, good thermal conductivity, easy die-casting, good plasticity, elongation higher than iron, low noise, good movement stability

Disadvantages:high price, low hardness, suitable for installation in the place where not much effort.

Cast iron motor:

Advantages: high hardness, resistance to external pressure, not easy to deformation, low price, can be installed in some work force and poor environment place.

Disadvantages:heavy weight, poor thermal conductivity, not easy die-casting, the plasticity and elongation are all lower than aluminum casting. It’s noisy and less stable than aluminum.

Aluminum housing for small electrical machines is considered in the following ways:

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1. Aluminum has a lower density, which reduces the weight of the whole machine.

2. Aluminum conducts heat better than iron, which helps the motor dissipate heat.

3. Aluminum low strength, easy processing and manufacturing, saving processing costs.

We know that in the AC motor, the casting does not involved in the motor circuit and magnetic circuit conduction, it will not affect the electrical performance of the motor, only in the mechanical performance.

The height above 225 has almost no aluminum casting, because of poor mechanical strength. 

Height  63 to 160(225) of the motor, both cast iron and aluminum casting. 

These two materials should have no significant effect on the overall performance of the motor.

The difference between cast iron or aluminum for motor housing:

1. cast iron housing motor , durable, stand the knock, high mechanical strength. Disadvantages: its weight is relatively heavy, easy to rust, heat than aluminum poor.

2.aluminum housing motor, beautiful, not easy to rust, easy processing, good heat dissipation. But the mechanical strength is poor, the cost and the corresponding price bothr high,.

3. In electrical performance, whether the motor shell is cast iron or aluminum are the same

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