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WORKHOLDING

HQC® Quick-Change Collets - 17884 Features and Benefits

Greater Gripping Force & Faster Machining Times True Parallel Gripping

There is no collet shank. Therefore, the collet segments remain parallel to the stock even when there are variations in the stock size. Parallel clamping minimizes stock “push back" and requires less draw bar force to achieve the same gripping capability as conventional collets. Since solid collets and master collets are of a one-piece construction, considerable force is required to flex the leaves of a solid collet and bring the gripping surface in contact with the workpiece OD. Because there are no leaves in the HQC system, additional gripping pressure is directly applied to the workpiece. Higher feed rates and higher spindle speeds are possible. Because of the extra gripping force, tool life increases and parts come off the machine quicker.

Quick-Change • 20 Seconds or Less

Hardinge
® HQC Quick-Change collets can be changed from one size collet to another size in less than 20 seconds. This is accomplished by using a manual or hydraulic changing wrench. The wrench compresses the collet, allowing for quick and easy removal, and quick installation of a different size collet head. Power units are available for the hydraulic wrenches.

More Uptime on Multi-Spindle Automatics

The HQC System requires less draw bar force to adequately grip the bar, greatly reducing the breakage of closing fingers and pins common when the bar varies beyond the range of a standard solid collet or master collet with pads. See Page 8

Bar Stock Variation—No Problem

The HQC Quick-Change Collet System eliminates the need to change collets due to normal variations in bar stock, greatly reducing the downtime normally required to change collets.

Quick Seal Insert Replacement

Unlike other Quick-Change collet systems, the HQC patented operator-replaceable slot-seal system eliminates the need to return the collet to the manufacturer to have the seals changed or re-vulcanized. The inserts are easily replaced in your shop by the operator.

Eliminate Conventional Spindle Adapters

The HQC Quick-Change Collet System is shorter than standard collet adapters, gaining more working area. Machining closer to the spindle results in better total indicator reading (TIR) on finished parts.

The Hardinge Tradition

The Hardinge HQC Quick-Change Collet System is manufactured using the same exacting standards we use to produce our other lines of collets and workholding devices. Hardinge collets are the longest-wearing collets and maintain concentricities unequalled in the metalworking industry. 3