gulf0927
Member
- Location
- Lehigh Valley, PA
Replacing a 208v motor on an exhaust fan. Got the old wheel off the shaft, should I use threadlocker to set it on the new motor? I'm an electrician, not a mechanic. 
Threadlocker with motor replacement?
- Thread starter gulf0927
- Start date
- Status
- Occupation
- Licensed Electrician
No need for it. I wouldn't. The next guy, might be you, would cuss you quite a bit.
K8MHZ
Senior Member
- Occupation
- Electrician
Edited post:
Don't do it!!!
You may never get the wheel/pulley off again.
Don't do it!!!
You may never get the wheel/pulley off again.
drcampbell
Senior Member
- Location
- The Motor City, Michigan USA
- Occupation
- Registered Professional Engineer
Threadlocker on the threads of the set screw(s), and anti-seize compound on the shaft, keyway & key.
There are different grades of thread locker. Some are designed to be removable, some are not. Unless there is something unique about the fan application (external vibration, for example) it should not be required at all. If you think you need it, use the non-permanent variety.
K8MHZ
Senior Member
- Occupation
- Electrician
The 'non permanent' is the blue. If put on screws, they can't be removed without heat, or the heads will strip off. I don't think I would ever use it on a motor shaft, let alone the orange or red stud lockers.
- Occupation
- Licensed Electrician
No and no and no. No thread locker on the set screws.
drcampbell
Senior Member
- Location
- The Motor City, Michigan USA
- Occupation
- Registered Professional Engineer
I have never stripped off the head of a fastener installed with either blue (non-permanent) or red (high-strength) thread locker. It requires more torque, of course, but that's why thread locker exists.
Using thread locker and anti-seize compound will prevent the two components (screw/hub and hub/shaft) from rusting together.
FionaZuppa
Senior Member
- Location
- AZ
- Occupation
- Part Time Electrician (semi retired, old) - EE retired.
all depends. is the set screw a type of interference screw? if so then really no need for anything. blue locker is a cant-go-wrong choice. std white elmers glue also makes for a decent anti-vibration thread "locker" for some applications.
That's not been my experience. Maybe environmental conditions / age of installation are factors.
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