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Apr 20, 2021
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How to lengthen a short shaft of an electric motor without welding and turning

On the back of most electric motors, the shaft is cut, but there are situations when it is needed. In this case, it can be increased. This is done in an affordable way that does not involve welding or using a lathe. Everything can be done at home, and the result will be more than acceptable with minimal beating.

What you need:

  • threaded rod;
  • elongated nut for a stud;
  • epoxy resin.

The process of building up the motor shaft

For extension, you need to drill a hole in the shaft in order to cut the threads and screw in the stud. You need to drill with the engine running, the drill is simply substituted for convenience, clamped into the drill, its rotation is not required. For drilling to work, it is required that the shaft rotates in the direction of the drill turns. If it turns in the opposite direction, then you need to temporarily reverse the polarity of the motor connection in order to change the direction.

How to lengthen a short shaft of an electric motor without welding and turning

After drilling, the shavings are cleaned out of the hole, and a thread for the stud is cut in it. The tap is held stationary; you need to rotate the shaft by the pulley on the back of the motor. After cutting, the thread is degreased.

How to lengthen a short shaft of an electric motor without welding and turning

A stud is screwed into the shaft, lubricated with epoxy glue.

How to lengthen a short shaft of an electric motor without welding and turning

An elongated nut is screwed onto it until it stops, also with the application of resin on the thread.

How to lengthen a short shaft of an electric motor without welding and turning

After the epoxy has set, the excess shaft length is cut off. Next, you need to start the engine and grind off the edges on the elongated nut with a grinder with a grinding wheel. After that, you can install a pulley, disc or flange on a new shaft, and then tighten the equipment with a nut.

How to lengthen a short shaft of an electric motor without welding and turning

How to lengthen a short shaft of an electric motor without welding and turning

How to lengthen a short shaft of an electric motor without welding and turners

If a shaft with a bolt hole is required, then a short stud is used initially. It should only reach the middle of the elongated nut.

How to lengthen a short shaft of an electric motor without welding and turners

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