Grinding - 8: Centerless
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.
Centerless grinding is OD grinding performed on parts without centers and without any place to hold on to it (as with a chuck). Picture the rollers in a roller bearing or a dowel pin. There is nothing to hold on to.

On the centerless grinding machine the part actually rotates between a grinding wheel and a regulation wheel. The regulating wheel governs the rotation of the work piece. On many machines these types of parts are being ground continuously by being fed in one end and ground out the other end. It is vey fast.

The regulating wheel does not grind. It is made of a tacky material that makes the work piece rotate and adds a "squeeze" to regulate material removal.

The work piece sits on a carbide rail and spins against it.

Note that the regulating wheel and grinding wheel rotate in the same direction.

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label: grinding, grinders, grinding whees, ID, OD, Universal, tool and cutter, surface grinder, feeding, coolant, centerless. lapping, polishing