Precision arbor

Claim 1

A HIGH PRECISION ARBOR FOR WORKPIECES HAVING AN ARBOR ENGAGEABLE SURFACE COMPRISING BODY MEANS HAVING A LONGITUDINAL AXIS ADAPTED TO BE ALIGNED WITH THE LONGITUDINAL AXIS OF THE ARBOR ENGAGEABLE SURFACE OF THE WORKPIECE, A PLURALITY OF SPACED PARALLEL GROOVES FORMED IN SAID BODY PARALLEL WITH THE LONGITUDINAL AXIS OF SAID BODY MEANS, EACH OF SAID GROOVES HAVING SIDE WALLS SPACED APART A PREDETERMINED DISTANCE, A PLURALITY OF SPHERICAL WORK ENGAGEABLE MEMBERS EACH HAVING A DIAMETER GREATER THAN SAID PREDETERMINED DISTANCE HAVING AT LEAST PORTIONS THEREOF DISPOSED IN SAID GROOVES FOR MOVEMENT ONLY IN DIRECTION PARALLEL WITH THE AXIS OF SAID BODY MEANS AND SAID WORKPIECE, ANNULAR RETAINING COLLAR MEANS FORMED WITH A PLURALITY OF RADIAL APERTURES CORRESPONDING TO THE NUMBER OF SPHERICAL MEMBERS AND HAVING AN ANNULAR SIZE INTERMEDIATE THE ANNULAR SIZE OF SAID BODY MEANS AND THE ARBOR ENGAGEABLE SURFACE OF SAID WORKPIECE, SAID APERTURES IN SAID COLLAR HAVING A SIZE PERMITTING PORTIONS OF SAID SPHERICAL MEMBERS TO PROJECT THERETHROUGH FOR CONTACT WITH SAID WORKPIECE WHILE RETAINING SAME IN SAID GROOVES, SAID COLLAR MEANS BEING RESILIENTLY MOUNTED ON SAID BODY MEANS FOR LIMITED AXIAL MOVEMENT INDEPENDENT OF THE INTERFITTING MOVEMENT OF THE WORKPIECE AS IT IS PLACED ON THE ARBOR TO PERMIT EASE OF LOADING.