5C Master Expanding Collet Assembly (5EC-70)

The Hardinge® Super-Precision® Master Expanding Collet is a valuable aid for close tolerance machining. There is no end movement of the master expanding collet or pads. The collet threads are separate from the collet body and pull back to operate the expander. The shoulder on the machineable pads locates the work for Dead-Length® control for facing repetitive parts to the same length. No spindle nose cap is required.

The master collet is hardened and precision-machined. The pads are soft for turning in the machine spindle for exacting concentricity. Depending on job application, pads may be machined for internal gripping from 1⁄4" to 3" ID. The limit ring is used to stabilize the pads while turning to the desired diameter. Pad segments and master collet are stamped "A", "B" and "C" for replacement positioning. The pads may be re-machined for smaller diameters. Can be used on all machines or attachments with a 5C or 16C spindle and operates with the standard draw spindle (bar). The collet body assembly and the limit rings are a one-time purchase. After that, you only have to order the low-cost pads.

5C Master Expanding Collet Assembly Parts List:

• Expanding Collet Body (5EC-70-1): 11410000000000
• Draw Thread (5EC-70-2): 11430000000000
• Draw Plug (5EC-70-3): 11450000000000
• Spring (5EC-70-6): 11510000000000
• Screw: 0100306
• Nut: U-4141-C