Bench grinder wobble?

[Dustin Echoes]

Alright, all you bench grinder pros out there, I have a dumb question. I have an 8" bench grinder, it's a mastercraft. I got it for $20. Had coarse and fine grinding wheels on it, and decided to remove the coarse, and add a wire wheel. This setup suits my needs better. My problem is a dumb one. Before I messed with it, this thing ran perfectly true. I removed the wheels, and went to put the fine one back on, and now it "wobbles". I pulled it back off, and checked the runout on the shaft with a dial indicator. It's great. When I put the wheel back on, it wobbles almost a tenth of an inch! Not good at 3500 rpm. What am I doing wrong?

 

[rlitman]

If you're not missing a bushing, hit it with a wheel dresser and true it up.

 

[ken w.]

You may want to rotate the wheel 180 and see if this helps. I usually have this same thing when I put on a wire wheel.8" is a big wheel. It doesn't take much to make it unbalanced.

 

[buening]

My guess is the plastic bushing in the grinder wheel hole fell out, and not it doesn't get centered on the arbor shaft.

 

[Dustin Echoes]

It's centered on the shaft, it's a 5/8" shaft, and a 5/8" hole. It's like I have it on crooked, but I've tried spinning it several times on the shaft, no luck. I'll try dressing the wheel, and see what that does.

 

[buening]

Dressing the wheel won't account for a tenth of an inch wobble. Find the reason why its wobbling, as like you said it didn't do that before. Remove the wheel and start from scratch again.

 

[Outlawmws]

Is the wobble side to side or a rotating bounce?