• Easy and convenient to use, long service life.
  • Product Name : Diamond Grinding Wheel;Model : 11C9;Shape : Bowl Shape
  • Main Material : Diamond ;Grit : 120;Outside Diameter : 100mm / 3.9"
  • Mounting Hole Dia. : 20mm / 51/64";Rim Dimension : 10 x 5mm / 0.39" x 0.2" (W*T)
  • Overall Depth : 35mm / 1.4";Color : Gray

I managed to find a 20mm to 1/2" bench grinder arbor. Was able to attach next to existing grind stone. Now mounted on the right side of the grinder along with the existing stone. 20mm to 1/2" reduction was messy in two steps. If anyone can point us to a one piece reducer (20mm to 1/2") it will be appreciated. I bought this to grind TIG tungsten electrodes on the narrow outer band, not the larger side. Will use the larger side for other things to grind. My electrodes grind beautifully especially when rotated slowly with a variable speed drill motor. I am very pleased with this wheel and highly recommend it for all sorts of sharpening jobs. Right now I use it to grind my electrodes.

I bought this diamond cup so I could re-sharpen all the chipped and worn carbide-tipped tool bits I've accumulated. It works great, and a 20mm arbor for it is easy to make on a lathe. This cup does the work of diamond grinding wheels that cost over 3 times as much.

Made my own mandrel for this. Used to sharpen carbide cutters for my lathe. Does a fine job so far without any noticeable wear.

Worked quite well on carbide endmills and HSS bits. The grit is a bit too coarse for final finishing of these items but it does chew the metal pretty well. Edit: On my second one of these. They work well but have a somewhat limited life.

Will be used for tungstend electrode grinding.

Fast delivery, very good tool!

Perfect for sharpening carbide lathe tools.

LIKED THE STONE , WORKED FINE ON MY GRINDER, I USED MU DRILL TO HOLD THE ELECTRODE AND PLACED IT AGAINST THE GRINDING WHEEL WITH THE DRILL RUNNING THE ELECTRODE SHARPENED NICELY.

Good for sharpening