Grinding wheel runout

I’m just guessing, but have you tried truing up the circumference?

-- If we learn from our mistakes, I'm getting a fantastic education.

A machinist friend told me that every time you replace/remount a grinding wheel, you must redress the wheel. Apparently the tolerances used to cast the grinding stone are far from perfect.

I would think that the face should not be out of round. I’d take the stone back, and let them try it on their machine in the store.

-- Karson Southern Delaware karson_morrison@bigfoot.com

Also check the arbour for tight fit. In the wheels arbour hole any slackness will be magnified a thousand times at the cutting edge if this is fine then perhaps removing the wheel has not helped and as said regrinding the front edge and sometimes also the sides will help retrue the wheel.Also try pinging the wheel when removed in future with a piece of metal like a screwdriver holding it in the centre hole to see if you get an nice clear bell like sound when struck, if it is a dull like thud then the wheel is definitely damaged/cracked and must be replaced immediately hope this helps excuse my typing tonight a bit shakey.Alistair

-- excuse my typing as I have a form of parkinsons disease

Lew is right. Every time you mount or re-mount the wheel you are going to have to true it up with a dresser. I use a single point diamond dresser. They are not as costly as the name would suggest. Some online resources are . . .

http://www.woodturnerscatalog.com/store/Sharpening___Grinders___Wheels___Diamond_Wheel_Dresser___diamond_dresser?Args=

http://www.hartvilletool.com/product/11253

http://www.diamondtool.com/sngptdre.html

Just be careful to grind only at the point of the diamond. I once saw a fellow actually grind the diamond out of its setting because he didn’t understand how to use the tool.

Rufus

-- Always remember half of the people in this country are below average.

Thanks for the replies. The actual grinding edge seems reasonably true, it’s more that the stone appears to either not be flat (thought it appears to be so when placed on the TS) or more likely, the plastic center bushing is not installed true to the rest of the stone. I’ll try swapping it for another, main problem with that is the store’s about a 50 mile drive…

Dan

Lee Valley sells a grinding wheel trueing kit. But you may need to exchange for a new wheel. Good luck.

-- Pat, Colorado