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A left hand taper adapter for a straight shaft grinder/buffer. Bought it from Rio Grande. It attaches to the straight shaft with the two setscrews.
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Buffs with pin holes are used and they screw on.
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A deburring/unitized/beartex wheel held on a grinder. The large washer transmits the rotational force to the wheel.
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The hole in the wheel is larger than the shaft and reduced by the bushing.
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I made the bushing myself on the lathe, but they are a common part that often come with grinding wheels when you order them.