Hi everyone,
I was given these to grind down sprues after casting.
They work great! Only problem is I have no idea what they are called so I’m unsure of what to order.
Any help would be greatly appreciated!
Called “heatless wheels” Also sometimes called mizzy wheels. Come in a couple different diameters.
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Thank you 
Looks like a worn down mizzy wheel. They come in different sizes…Rob
These heatless wheels wear down fast because they bind the grit loose. Made to break down so the softer metals wont clog up the grit. I use them a lot in cleaning up castings. My usual casting cleanup procedure is: Clip or saw off sprues and supports. Rough grind smooth with heatless wheel. Rotary abrasive for inside. Magnetic pin tumbler. Then I split lap everything I can reach with a big wheel. Seldom use a file first. Finish the cleanup with smaller tools, files, burrs, brushes and felt wheels, trumming, laser polish small inside areas.
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