C-Series Collets Used in Many Applications

Hardinge C-Series collets, in sizes ranging from 1C up to 25C, are used in manual and CNC lathes, mills, grinding machines, collet blocks and closers, indexers, rotary tables and tool holders.

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Hardinge C-Series collets, in sizes ranging from 1C up to 25C, are used in manual and CNC lathes, mills, grinding machines, collet blocks and closers, indexers, rotary tables and tool holders. The Hardinge collet is manufactured to exacting standards from special alloy steel. Threads are heat treated, and the body is spring tempered to ensure accuracy and durability. The C-series 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 regular collets are available from stock. Special accuracy 5C collets with a guaranteed maximum TIR of 0.0002” are available. Collet variations include emergency collets, step collets, extended-nose collets, step chucks (stepped out collets that hold larger diameters), and dead-length collet systems for controlling workpiece lengths.

The standard 5C-series collet, with an order hole of 0.9843” or less, includes precision internal threads to permit the use of Hardinge positive solid and ejector stops. The stops are threaded into and positively locked against the end of the collet and are adjustable and machineable for the desired part length to accommodate a variety of chucking work. Once locked in place, the stop cannot move even under heavy drilling or other end-working pressures. Universal stops are available for 5C collets and 16C spindles. A variety of Hardinge dead-length systems are also available for producing consistent workpieces, including through-hole style for bar work.