Gallery, Projects and General > How do I??

Difficulties in removing ER-chuck from BLDC spindle motor

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philf:
Pekka,

If you're not bothered about saving the chuck grip the chuck and mill it down to shaft diameter (or slightly above the shaft). If this doesn't release it turn it over and do the same to the other side.

Phil

PekkaNF:

--- Quote from: philf on August 15, 2019, 04:00:45 PM ---Pekka,

If you're not bothered about saving the chuck grip the chuck and mill it down to shaft diameter (or slightly above the shaft). If this doesn't release it turn it over and do the same to the other side.

Phil

--- End quote ---

That is a great idea. Thank you. It is cylindrical outside (minus key flats). Small v-block sorts it well between milling vice jaws and then that should not present any problems.

I have it allready in the freezer, I might try as well hot air gun and shop pres Tommorrow. It's wraped into clingafilm that should keep the swarf away if I need to mill it.

Pekka

PekkaNF:
Thank you for good alternative methods.

Love to have Plan "B", sometimes "C" etc. I would hate to paint myself into corner.

Overnight in the freezer, little heating with hot air gun, moderate power with press and it come out.

Pekka

*interesting thing is that the shaft and chuck hole are bit more under 8,00 than I expected. Luckilly I had a hunch and turned the drift diameter to 7,95 mm. Drift got stuc to chuck while pressed out the chuck from the shaft. I though there were debris, but looks like the chck ID is prety coles to that.

Now I have to remember that when I turn the pulley for this motor. Can't use reamer, it would make oversized hole for this motor shaft.

Joules:
 :D

Glad it worked, the plastic bag is more to keep moisture out of the motor once removed from the freezer.

PekkaNF:
Exactly, kept the wrap on until the temperature was equalized. Still the front flange sweated.

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