Anybody ever opened up a Kollmorgen 300W

[nedfunnell]

So, I have had one of those 300W Kollmorgen brushless motors in storage for a while, you know, this one:

http://www.ebay.com/itm/350483743702

Recently I've been working on putting it on a bike, and was getting pretty well set up theoretically:

However, I was just out sizing up its location on the bike, and I set it on the seat for a moment- it slid right off when I was fiddling with something on the front wheel. SMACK! Right onto the shaft, face down. I tried turning the shaft by hand and it is evident that the shaft and bearing had come loose from their press fit, and the rotor was no longer being held in the center. I'm thinking there isn't any actual physical damage, just that the shaft and bearing need to be pressed back into place. However, I don't want to just go nuts in that thing to see if I can press it back in. I thought I'd check here first to see if anyone had experience with this motor before. Has anyone here opened one of these up before? The motor itself is behind a glued-in sheet of garolite that I'd have to break to get into things, so before I do that I want to get whatever info might be available. Anyone?

If it turns out to be not easily repairable, I'll sell it for the parts to anyone interested- there's a brand-new 300w brushless controller right there, tested working and unused.

 

[arnie1]

You are right that the pressed in shaft came loose from the rotor. Carefully cut away the glue holding the internal circuit disc in place. Remove snap rings on the exposed stub shaft. The rotor is shaped like a cup. Don't drop the rotor. The ceramic magnet is fragile. I used 10mm ground shaft extended the motor output shaft since the original is so short.

Use Loctite to hold the shaft in place.

Be careful gluing the circuit disc back in place. It can drag on the rotor and cause heating from friction.