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Okay, this is hilarious.

File under “Off the shelf solution”:

315539

It’s just the filter for a shopvac. It perfectly fits with a snug, air-tight seal, right onto the motor housing. There’s...

The balance is good! When I designed the center part, I added a little mass around the keyway cutout to make sure things were as even as possible, and that seems to have pretty much done the trick....

I have managed to find reasonable assorted nut & bolt kits in the past... And irritatingly, there was a great local hardware store called Orchard Supply Hardware. In business since the 1930’s.
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I haven’t done anything with ducting yet, and don’t really have anything invested in the idea — it just seemed like a decent step in controlling intake. Just having a filter over the intake...

I couldn't help myself and played with the A30 trizact and the cork.

The cork, even when loaded with polish, was meh.

The trizact, then a dressed leather belt should get me to a very passable...

315489

IT’S ALIVE!

Well, mostly alive. I could grind on it now if I wanted to, but for a variety of reasons I don’t want to yet.

Most importantly, the motor really needs a functional fan and...

I’m still planning to make a housing for the motor since it’s air cooled and completely open. Then I plan to just mount it to whatever I use for a table (still looking around for that).

If I need...

I'm gonna be pushing the buy button on one of these grinders later this week (hooray for car rebate!). I'm adding a 4" contact wheel and some other parts and I'll be driving it with a 2.5hp DC motor...