Eerf grinder build-a-long

Sandeggo, I had the same problem getting the platen wheels lined up because the drive pulley can only be outward so far and solved the problem by looking at Ranger Bob's GIB build photos. He machined a 1/4 inch relief cut in the tool arm for the platen attachment and I did the same thing and solved the issues while still providing lots of grab on the drive wheel and motor shaft. Larry
 
Larry already covered relieving the arm which has worked really well for me and I have five different tool arms. It's really easy to do with a mill which it sounds like you already have. One thing I noticed on your build was the location of the set screw on your drive wheel; it is in the center and really needs to be more toward the motor. I would drill and tap a new hole so when you push the drive wheel out, the set screw isn't riding too close to the end of the shaft. Even with the relieved tool arms, I don't have any more than 1.25" shaft engagement on the drive wheel.

Bob
 
Holy crap why didn't I even think of or remember that!?!? I'll definitely mill that sucker down today. The set screw is still engaging the shaft, however I don't have the ability to rebalance the wheel if I were to bore a new hole. Would it matter?
 
Here is a photo from Ebay of a 4 inch drive wheel with a 5/8 bore and 3/16ths keyway showing the location of the setscrew towards the motor from the center of the wheel. This allows you to mount the wheel at least an inch and an 1/8 on the motor shaft and seems to work fine for me. You can either drill a new set screw hole and tap it or shop for one of these drive wheels for a good price and just put it on and keep the other drive wheel. This wheel came from a seller named "Jackstraw" and he has excellent drive, idler, and tracking wheels for sale. Larry


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Sand, On a small 4" wheel, I don't think drilling another set screw hole will cause any balance problems. "IF" concerned, just drill another hole on other side to offset metal removed from setscrew hole. Don't think it will matter at all.

Ken H>
 
Ken H> said:
Sand, On a small 4" wheel, I don't think drilling another set screw hole will cause any balance problems. "IF" concerned, just drill another hole on other side to offset metal removed from setscrew hole. Don't think it will matter at all.

Ken H>
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I'm just gonna leave it as is, I used it for a few hours today with no issues. Running an 80 grit belt to profile some g10. I still gotta build a platen and a work rest
 
I keep debating on if I should let this thread die, but I keep encountering things that I should post.
I took my grizzly wheel to my buddy's shop as he has a lathe big enough to cut it for bearings. Well that didn't go as well as I had hoped. The wheel has a wobble to it. I have another buddy that has a better setup that will fix it and oversize the bearings for me.
Yesterday morning I whipped up a work rest. Do not build one like this. The arm that attaches to the table is protruding up higher than the table and when trying to grind in tight curves like a finger notch the knife won't lay flat. I can use it for most operations and I will probably stick with it as I have a small wheel setup coming today.
1075077F-80F7-4155-8A75-5E9A68904D8A_zps5ria8bgm.jpg
 
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