Setting Up Collet Blocks for Multiple-Part Machining

Collet blocks can be used horizontally or vertically on mill tables, jig grinders, flat or angled fixture plates, tombstones or rotary trunnions.

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Collet blocks can be used horizontally or vertically on mill tables, jig grinders, flat or angled fixture plates, tombstones or rotary trunnions. Group them together hydraulically or pneumatically for high-production multi-part machining. Part gripping sizes range from 0.008” (1C collet) up to 6” (step chuck) in diameter. Hex, square and custom-shaped collets are available to hold a variety of shapes. Hardinge offers several models of collet blocks that use standard collets — 1C, 3C, 5C, 16C, 3J, 22J, 35J, and FlexC 42 and 65 mm.

The part diameter or range of parts will dictate the collet size required. The part size and the machining process will determine the required gripping force. Higher gripping forces will be needed for heavy rotation, tapping, threading or off-center work. Hardinge will help determine what size collet block is needed, whether a high-force or low-force collet block is needed, and if a hydraulic or pneumatic operation is needed.