I would like to put this disc sander back together. It's a 20" Apex 20-S serial 5600 (Rankin / Pal Industries) and the gentleman who gave it to me said it was a ~1990s model. It looks like everything is there, except the electronics and motor. I'm waiting for a call back from the Apex service tech, will see if they are helpful.
1 - is it worth putting back together with a new motor? There's an ugly blue machine on eBay, asking $1300, but it has nicer rack/pinion handwheel adjustments. Mine will need a motor, dust collection port, starter, and wiring. I haven't checked for disc runout.
2 - the base needs rotation about 180degrees, but I don't want to mess up the internal table lift balancer, or have the spring come flying out. Can I just remove the bolt/nut at the bottom to remove the base, or do I need to disconnect the cable or spring first?
3 - what size motor should I use? Similar units have a 2-3hp motor 1725rpm, and I'd use 3ph with a VFD for speed and directional control.
4 - where were these made?
5 - is the direct drive, bolting the disc on with a woodruff key, ever an issue with runout?
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