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Most servo motors are repaired and delivered in five business days. We also offer a 48-hour rapid turnaround on servo motor repair services for a nominal 15% expediting fee.

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The Motor Repair Process

Details on Servotech's extensive evaluation, repair and refurbishing processes. Read more...

Yaskawa Servo Motor Repair

One of our most commonly requested services servo motors, detailed information on our Yaskawa repairs. Read more...

Fanuc Servo Motor Repair

One of our most commonly requested services servo motors, detailed information on our Fanuc repairs. Read more...

Replacement Encoders

OEM replacement and Servotech manufactured encoders specifications and online ordering. Read more...

Feedback Devices Repair

We repair most makes of encoders, resolvers, tachometers and other forms of feedback. Read more...

Servo Motor Parts

We inventory a large stock of servo motor brake, bearings & DC parts forquality and turnaround. Read more...

How to Prevent Damage to Your Servo When Removing a Coupling

The Coupling on your motors shaft needs to be removed or put back on. You grab a hammer and some pry bars...

Servo Motors Are Sensitive

First off, put the hammer and the pry bars back. Your servo has very sensitive feedback sensors installed in the motor. These devices are attached directly to the shaft and are easily damaged. Any hammering could break the glass of an encoder. Prying on the coupling could also break glass or drive the rotor of a resolver into the servomotors endbell destroying it. In order to remove your coupling easily, there are a few things to evaluate about it.

Are There Any Setscrews or Bolts on the Shaft End?

Take the time to clean the coupling and look. If you find one setscrew there are probably more. Pulling the coupling off of the shaft without removing setscrews will damage the shaft.

Are There Threaded Holes Usable as Backdrives?

Many couplings have compression rings that can be pushed apart using the backdrive holes. This will allow you to pull the coupling off by hand.

Use a Puller, Not Pry Bars

Using a puller will move the coupling in relation to the shaft. Pry bars will pull the shaft and the coupling away from the motor possibly damaging the bearings and/or feedback.

If you put a lot of force on the puller and the coupling still will not budge then try adding some quick heat to the coupling. If you can heat the coupling before the shaft the expansion will help free the coupling.

In Summary

These are some tips to remove a coupling from the shaft while minimizing possible damage to your servomotor.