Apparatus for securing a workpiece to a rotatable machine member

An adapter system for securing a rotor to a lathe, comprising:

• a hub slidably engageable with a rotatable driven shaft of the lathe;
• a centering device positionable on the shaft;
• a spring having a distal end and a proximal end, the distal end insertable in the hub, the proximal end connectable to the centering device;
• a retaining ring attachable to the hub for retaining the centering device within the hub;
• and
• a housing freely movable axially on the shaft for locating the rotor substantially perpendicularly to the shaft.

A method for securing a rotor to a lathe, comprising the steps of:

• providing a hub slidably engageable with a rotatable shaft of the lathe;
• installing a centering device axially positionable on the shaft;
• including a spring demountably insertable in the hub and connectable to the centering device;
• placing a retaining ring in the hub for retaining the centering device in the hub;
• furnishing the system with a housing freely locatable on the shaft for securing the rotor in the system in a substantially vertical position;
• and
• equipping the lathe with a locking nut.