For older model MARK V's with Poly-V-Belt Drive System

Earlier Model 500 MARK V's were produced with a single bearing Quill that could generate runout and wobble that will jeopardize the precision of your drilling, turning and other operations. This dual bearing quill will solve that problem and improve your results on virtually every project. Installs easily in less than an hour by following the detailed instructions.

Two-Bearing Quill Upgrade for ealier model MARK V's made before 1990
Not comatible with ER or M2