6 Inch Diamond Grinding Disc Grinding Wheels for Sharpening Metal Stone Grinding and Processing (320 Grit)

Very good quality grinding wheel. The runout is very good

I inspected the grinding wheel prior to mounting it on the grinder machine. I found that the concentricity was out .010/.015 and the side-to-side movement (wobble) was out .020/.025. After putting the grinding disc on the grinding machine and turning it on, it vibrated so badly that the entire machine and stand started walking across the floor. I have a concern about the ABS (plastic core) I have been in plastics R&D for more than 50 years and would never recommend ABS for this application, it's flex modulus is too high because it actually a rubber-based material. I do not plan to use this wheel.

Works as it should and great price.

Wheel is lopsided! Vibration level is so high the grinder bounces of the bench! It does not spin straight. Not useable. I was out of town when it was delivered and when I finally got it installed to find out it was a piece of crap it was too late to return so now I am stuck with a diamond paper weight!

The diamond wheel works great. Used it to dress a carbine lathe tool. The provided spacer was not as tight as I would like it, had to mess with it a bit.

It was what I expected..

For the price it’s a great value. The caveat is that you may need to spend a lot of time balancing the wheel. I found several videos on how to do that and was shocked at how far out of balance it was. I finally got it balanced and it works well but be prepared to have a LOT of vibration out of the box. After balancing it works GREAT

Dose t run true, poor quality, don't recommend.