The Hardinge Collet is manufactured to exacting standards from special alloy steel. Threads are heat treated and the body is spring tempered to assure accuracy and durability at low cost. A wide range of standard sizes and shapes (and some not so standard) are available for off-the-shelf delivery. 5C decimal collets are available in .001 inch increments from .015 inch up to and including 1.0625. All collets are available in fractional sizes of round, hexagon and square to capacity. In addition, many round collets are stocked in metric, decimal, letter and number sizes. Most of the popular sizes of round serrated, taper hole and rectangular collets are available from stock. Many collets include precision internal threads for the Hardinge threaded positive stops.
Special-Accuracy 5C Precision Machined Collets when held in a Hardinge Super- Precision® spindle, are guaranteed to have a maximum TIR of .0002 inch for 5C round collets over 3⁄16 inch (4.76mm) to the collet's capacity measured 1 inch from the face of the collet.