Disc grinder tolorance

[Britt_Askew]

I got a 9" beveled disc and it had a wobble to it. The seller said there had been a bad batch that was not drilled straight and would replace it. Well the replacement is the same?? Here is a picture showing how much it is off.

Dial reads 0 on one side of the disc and .018 on the other. Am I being to picky ?

PS. I thought about the motor shaft being bent and removed the key and tried it on several spots around the shaft and the shaft was straight. Even tried a second motor to be sure it is the disc.

 

[javand]

Did you try a new key? That sorted mine out, but I have had a bent shaft and a bad disc before.

You're not being too picky, if you don't have it spinning true, you'll have a lot of vibration or drag.

Try a new key and clean the keyway.

 

[Britt_Askew]

I tried a new key and it still has the wobble. I will let the seller know

 

[Stacy E. Apelt - Bladesmith]

.018 is a lot out of true on a disc. You can easily true it up some by using a large mill file held flat against the rotating disc.