Hardinge has introduced a line of lever-operated, counter-centrifugal and dynamically balanced Sure-Grip power chucks.

In the lever-operated system, the drawtube is connected to the jaws through a pivoting lever that is mounted on pins inside the chuck body. The lever system has reduced friction and increased mechanical advantage compared to a wedge-operated chuck. In other words, a lever will always have greater actual gripping power at the jaws than a wedge-operated chuck, for any given draw bar pressure.

The lever system also has reduced internal bearing surface over the wedge-operated closure, making it less sensitive to lack of lubrication. The design results in reduced wear on the operating cylinder, increasing component life.

Hardinge machines all have collet spindles that do not require a collet chuck or adaptor, they just require removing the collet and mounting the 3-jaw Sure-Grip power chuck when needed.

The chuck’s drawtube threads directly into the machine’s draw bar, just as a collet would. This changeover can be accomplished in ten minutes or less.

Hardinge manufactures its chuck components to high accuracy and repeatability standards. The repeatability of a chuck is the measure of its ability to repeat the performance, either from job-to-job or from part-to-part. Most models of Hardinge Sure-Grip power chucks have an accuracy (T.I.R.) of .0005 inch and repeatability of .0005 inch.

For more information: www.shophardinge.com