AmaCupid Bench Grinding Wheel 6 inch, for Grinding Sharpening Quenched Steel, High Carbon Steel and Other Hard Tools. Aluminum Oxide Abrasive. 1/2 inch Arbor, 3/4 inch Thickness,80 Grit

I wanted to replace one of the gray wheels on my grinder with a finer grit for finish grinding of my more expensive tools and knives. This stone is perfect for the job. The price was good as well. I am satisfied with the purchase.

Came nicely packaged and in perfect shape, works well

Was a little difficult to center accurately, but much better than the Norton wheel that I bought at the same time.

After 15 minutes of use on mild steel this wheel lost a full 1/4” of diameter and developed a center groove. It is also nearly 1mm out of round, making for terrible vibration of my grinder. I would not recommend this product. Cheap price, but you get what you pay for. Crap, basically I give them points for good packaging, but that’s about all.

Absolutely beyond being saved by dressing either with a dressing stick or Diamond dresser. It has been returned today for a refund. Note this fault is not uncommon with cheap grinding wheels? They are produced in large quantities without high levels of quality control? I bought a green silicone carbide wheel from same manufacturer/supplier that’s absolutely fine just required a light dressing. If you read other reviews you will see customers have same issues!

After sharpening 2 bowl gouges the disk is so misshapen its useless to use for anything that requires precision.

This wheel fits the spindle perfect. Works very well.

The central arbor hole is not parallel to the sides of the stone. It shakes side to side in a big way. It cuts HSS tools OK, but is scary to use due to improperly bored hole.

Balanced friable stone, good for grinding high speed steel without burning or bluing. Perhaps a bit course than 80 grit as described.

I use this for sharpening metal-cutting, twist bits. These sharpen at a medium rate, not too fast/slow, providing a clean, fine finish. I will this one again.