MACHINE WORKHEAD WITH MAGNETIC DRIVER

摘要

An electromagnet is disposed between a pair of bearings rotatably mounting a spindle in the housing of a machine workhead, such as the workhead of a grinding machine. The magnetic flux from the electromagnet is guided by the spindle extending therethrough to its workpart driving end located outside the housing. Bearing shoes engaging the workpart are connected to the housing so as to complete the magnetic flux path to the electromagnet through the housing. Non-magnetic shields are disposed between the bearings and the electromagnet and housing to prevent wear debris accumulation and etching of the bearing components from magnetic flux effects.