Can't remove armature from old Rockwell.
I've got an old giant Rockwell I use in a table, which is long overdue on bearing replacement. I'm having a heck of a time getting the armature out of the motor housing, and was wondering if anyone here is familiar with it. It's a model 514DM.
First, I'm assuming the lower half of the collet is in fact threaded onto the armature like all the others with a normal right hand thread. The only exploded diagram I've seen is too fuzzy to tell if there are any threads. Also, that lower part of the collet on these is round, rather than hex shaped, so you have to use a flat open-ended wrench rather than an impact wrench (which I don't own anyhow). Lastly, unlike the Porter Cables I've seen in some videos, there's almost nothing on this thing to grab in order to lock the armature in place. Most of it is up inside the body. I've even tried the technique I read about here using the two U-shaped halves of a piece of 2x4, and squeezing it into a clamp, but when I put enough torque on it, it still slipped and I'm afraid of damaging the armature or housing if I push it any further. I haven't tried heating it yet.
Am I going about this the right way, or is there some other trick to it? I'm wondering if the factory guys had some sort of jig they used.