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Cleaning up an old Wellsaw M1000 Horizontal Bandsaw, Part 10:
After that, a couple wire brushes and a portable sandblaster gun took care of the paint...
And two hours fabricating a custom wrench finally got the junction box
off the side
of the stator housing so I could clean it, too.
After that, the usual self-etching primer...
And two coats of my patented Boring Grey Machine Enamel. And while that's drying...
I noted that the output shaft of the motor looked a bit wonky, like
somebody might have
literally run a file on it while it was turning.
Today, I got out the calipers and gave it a closer look. Sure enough, it's in bad shape. It's supposed to be
nominally a 3/4" shaft, but the end was two thou
oversize, likely from being dropped or being hit by something,
just behind that was almost 20 thou small.
Now there's two ways to fix this. I could have simply chucked it up in
the lathe and turned it slightly
undersize 'til it was straight, but I'd
either have to turn it all the way down to 1/2", or custom-turn
pulley from scratch. (The typical pulleys being die-cast, don't have
enough 'meat' to properly
sleeve for an insert- and you'd have to sleeve
it pretty large to make room for the keyway.)
The other way, of course, is to weld it up and turn it back down. This, as they say, is not for the faint of heart.
First, we turn up a nice thick aluminum collar with the same bore as the
OD of the part of the shaft where the front bearing went.
Bandsaw that puppy in half...
And clamp it to the shaft wheret will both protect the bearing surface, act somewhat like a heat sink,
and keep me from welding too far up the shaft.
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