For years I've been using the same setup for polishing my jewelry and metal items. I used a simple 6" bench grinder bought from a local hardware store for less than $60. It has two grinders on each side.
With it unplugged, remove the safety shields and grinding stone from the right side of the machine leaving only the machine's shaft sticking out from the motor. Then, attach a right handed, tapered steel spindle bought at a jewelry supply store. The spindle's cost is less than $14. Spindles come in different sizes according to the shaft size (1/4" 5/16", 3/8", 1/2" and 5/8"). The spindle slips onto (over) the shaft, you then tighten the hex nut down against the shaft's flat surface.
On a 6" machine 3" or 4" buffs can be used. When attached to a right hand spindle, the buffs twist onto the end of the shaft by rotating them away from you. As stated in my last blog, I label each buff, matching it to the polish, and store inside a plastic locking bag.
Placing the machine in front of an open window with a box fan helps to remove any dust caused from buffing. Make sure to attach the machine to a solid surface so it cannot move while in use.
Until next time, have fun claying around!
by Janet Alexander