1" Acme HQC Head 5/16" Hex

The precision engineered Hardinge® HQC® Quick-Change Collet System is designed for use on automatic screw machines, Hardinge® collet-ready CNC lathes and all other chuck-style CNC lathes with A2-5, A2-6 and A2-8 spindles. The Collet Body, Spindle Mount and interchangeable Quick Change Collet Heads are produced to the same exacting standards employed by Hardinge® for over 100 years.

Unique Design

There is no need to sacrifice speed for accuracy. With its unique design, the HQC® Quick-Change Collet System exerts more gripping force and achieves greater concentricity control, ensuring the quality and performance that is synonymous with the Hardinge® name.

Increasing Productivity

Replace your 3-Jaw Power Chuck with the HQC® Quick-Change Collet System. The reduction in weight and the unique, efficient design of the HQC® System allow you to increase the spindle RPM without any concern for centrifugal forces. Hi-tech cutting tools, along with faster speeds and feeds, can now be used to boost your productvitiy beyond your previous experience. Chucking forces are higher than jaw chucks and even higher than solid standard and master collets. The interferences associated with jaw chucks are nonexistent with the clean contours of the HQC® Quick-Change Collet System.

Unique Collet Head Design with ±1⁄64" Collet Gripping Range

The HQC® Quick-Change Collet System has a working range of ±1⁄64" (.396 mm) for under a 2" diameter, and ±1⁄32" (.793mm) for a 2" diameter and over, when used on automatic screw machines and a range of -1⁄64" to +.008" on CNC lathes. This unique feature allows you to replace the solid and master collets currently used for bar work. The HQC® collet heads are designed with special replaceable inserts that form a seal while holding the collet segments together. This unique design protects the spindle, collet body and draw tube from chips and coolant, resulting in substantial direct cost-savings, as well as time-savings.