2X48 Belt Grinder Motor Options

Josh, my internet has been out for the last several days - I see nobody has responded to your question about mounting. Typically you cut a hole thru the mounting plate the size to allow that 1/8" flange to fit thru. Ideally, that would be a machined hole the exact size to lock motor into position. Depending on your mounting plate, you might use a jigsaw to cut an round hole large enough. One thing to consider, if you put a spacer plate, how much of the shaft will be sticking thru for drive wheel to mount on?

Again, depending on your type of grinder, you can always not use the 56C mounting face, but mount motor using the base flanges to base. This works pretty good, and makes adjusting the tracking pretty slick. Just set tracking wheel to level position, then "wiggle" motor until belt tracks in center.

Good luck.
 
Mounting is pretty straight forward. Nearly all electric motors have standardized frames, which will mainly refer to shaft size/position and mounting dimensions, so bolt holes will be the same on all 56C frames, for instance.

If you search something like "56C motor frame dimensions" or "56C frame size diagram" for instance, you should get the on center spacing. I wanna say they are 3/8-16 threads, about 5-7/8" on center and 90 degrees apart. The flange will have a fixed diameter too (4.5" on a 56c).

If you're mounting it to a currently solid plate: Center punch where you need the center of the shaft to be. Take a compass and scribe a 4.5" circle (or just a little bigger like 4-9/16" wouldn't hurt), then scribe a 5-7/8" circle from that same center. Drill your bolt holes 90 degrees apart on the larger circle, and cut out the 4.5" circle with a hole saw, hole cutter, or a jigsaw. From there, it's just a matter of lifting the motor into place and bolting it up.

Instead of cutting the flange hole, you could just drill a 3/4" hole to fit the 5/8" shaft through, and then just drill and bolt up your mounting holes, but this will shorten your available shaft length by whatever the height of the flange is. This may or may not matter though.
 
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