I just jam a wood scrap `between the wheel (or brush) and the grinder housing--kind of like taking off rotary lawnmower blades. Keep in mind the left-hand side almost certainly has a left-hand thread--so unscrew that one clockwise!
John Wadsworth
Last fall I bought a used, low-speed Dayton grinder at a local used-tool emporium. Over the winter I've bought a white wheel and a green wheel for sharpening my lathe chisels, and have been working on a design for a toolrest.
Problem is, I went to try to put the new wheels on the grinder, and can't for the life of me figure out how to remove the old ones. I can't find any sort of spindle lock, and I can't get enough of a grip on the old wheel to turn the nut. Right now, it has a crimped wire brush on one side, and an old-gray misshaped wheel on the other. I want 'em both GONE.
Any help here?
I had the same problem with my grinder. I tried jamming different things against the wheel, but I never got the nuts to break loose.
I seem to recall what I did was put a wrench on the opposite nut to work against the side I was trying to remove. I got one nut off, got the wheel changed, and then I reversed the process to get the first nut tight, and the second nut loose. Then when I had to tighten the second nut, I just jammed something against the newly installed wheel so I could get it tight.
I think. It was kind of a fiddly, wrench beating, cussing process, and the details are a bit sketchy.
You might have already looked for this, but I know that often I overlook the obvious... The two or three grinders that I've had have over the years have all had a double-flat on the shaft, between the motor and the wheel. I recall having to grind down a box wrench to fit the width, but I did manage to avoid most of the fiddly wrench beating and get right to the cussing.
It's one of those 'Don't let the forest get in the way of looking at the trees' things, Vic
If you have compressed air handy, try an impact wrench.
Just be sure to NOT....repeat NOT...can I say it again? NOT install a wheel using a pneumatic impact wrench...easy way to destroy a brand new wheel. Oh, and just to be sure, when first starting a new wheel, do not stand inline with the wheel for a couple of minutes. And yes, this is not urban legend, I have had a new wheel explode on me at startup...followed very shortly thereafter by me filling my pants. Only once in twenty-five+ years, but it was enough.
Mike
Understood, and I'll keep some spare pants handy.
Jon
Something that has worked for me in the past is to grip the sides of the wheel with a vise grip, using it as a clamp, and rotating the wheel until the vise grip is trapped against the wheel cowling. Then you should be able to move the nut. Kind of a makeshift spindle lock, if you will. If you want to reuse the wheel, protect the sides with cardboard from a cereal box or something similar.
-Jim Gott- San Jose, CA
I would be very careful using vise grips to hold the stone. You may inadvertently cause fracture of the media, and it could quite literally explode the next time you try to use it. If you cannot access an impact gun, make up a strap wrench.
A simple strap wrench can be made from an old belt. Staple a piece of hard wood to one end. Wrap the belt around the circumference of the stone, use vise grip to lock belt. Less chance of damaging stone.
If you chip the stone on the side or face, it is dangerous to use.
Dave
Jim Gott wrote:
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