Gallery, Projects and General > How do I??

Does squirel cage AC motor survive shaft removal from rotor?

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Manxmodder:

--- Quote from: awemawson on September 10, 2015, 04:39:30 PM ---I had always assumed that the rotor laminations had a keyway in the stamping - just shows what happens when you assume  :lol:

--- End quote ---

If memory serves me correctly I think some large industrial motors do have a keyway through the rotor laminations,but I can't see why they wouldn't still be able to be separated from the shaft.....OZ.

EDIT TO ADD: Pekka,if you're going to give this a try then be aware that the pressing collar/tube you use to support the rotor on needs to be a close fit to the shaft size or you risk distorting the laminations on the side that the shaft exits through....OZ.

mexican jon:

--- Quote from: Manxmodder on September 10, 2015, 05:33:41 PM ---
--- Quote from: awemawson on September 10, 2015, 04:39:30 PM ---I had always assumed that the rotor laminations had a keyway in the stamping - just shows what happens when you assume  :lol:

--- End quote ---

If memory serves me correctly I think some large industrial motors do have a keyway through the rotor laminations

--- End quote ---

The large motors we use in the drilling industry (1100 -1250 HP ) do indeed have a keyway machined in the shaft and the rotor, and yes they do come apart as that is one of our 5 yearly inspections  :thumbup:

lordedmond:
Yes done many when I did armature and stator winding

Make sure you use a tube to push close to the shaft

They are much easier than a DC one as the comm comes off the other way and needs desoldering and re soldering

 As has been said loctite is your friend

Stuart

PekkaNF:
Thank you. Very nice to hear that.

I asked from the local group too and the consensus seemed to be that very old and import motors should be easy, but modern domestic made are "impossible"????? Something to do with manufacturing method.

Maybe there are some different flavors? I'll try one domestic one and if it does not work, big boohoo...I just have to find next cheap/free candidate (maybe italian import).

Pekka

PekkaNF:

--- Quote from: awemawson on September 10, 2015, 02:14:51 PM ---John Stevenson is the man to ask, as he is repairing and modifying motors all day long as his day job - no doubt he'll be along in a while  :med:

--- End quote ---

I found this thread:
http://madmodder.net/index.php?topic=6096.0

Least it worked out for him!

Pekka

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