5C Collet Block Chuck Set

5C Collet Block Chuck Set. A 5C collet block chuck set is a precision workholding fixture designed for machining operations on lathes, mills, drill presses, and grinders, utilizing standard 5C collets to securely grip round, hexagonal, or square workpieces with capacities typically ranging from 1/16 inch to 1-1/16 inches. The set generally includes a square block for 90-degree indexing (ideal for 2- or 4-sided operations), a hexagonal block for 60- or 120-degree cross-hole drilling, quick-acting rings or a lever-operated closer for rapid collet tightening, and sometimes a spanner wrench for low-profile setups.

These hardened tool steel components enable economical, repeatable indexing without dedicated rotary tables, minimizing setup time for short-run jobs while maintaining parallelism within 0.0005 inches.

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