Microcrystalline grinding wheel was 150mm diameter x 40mm wide but worn down to approximately 140mm so there is 5mm of wear. There is still plenty of life in the wheel and it will outlast white wheels many times over. Sold at half the price of the 150mm original.
Recessed one side 80mm x 20mm leaving thickness of the wheel 20mm in the middle. Bore 1/2 inch or 12.7mm only available.
Fits the the Record RPBG and similar grinders

• Perfect for sharpening all steel and HSS tools especially woodturning tools
• Special grit cuts cool and fast
• Outlasts other wheels many times over
• Easy to get a superfine edge on HSS and carbon steel tools
• Self sharpening action - seldom needs dressing
• Equivalent to 80 grit