5C Internal Expanding Collet
1" Head Diameter × 1" Head Length


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  • Unlike chucks and most collets that grip the OD of a workpiece, 5C expanding collets are designed to grip on the ID of a part.
  • Accu-length design ensures precise workpiece positioning – no z-axis movement.
  • Collet head is easily machined to required size. Can be re-machined as necessary.
  • Concentricities of ±0.0002" can typically be achieved using Royal 5C expanding collets.
  • Made from 1144 steel that can be hardened after machining for wear resistance.
  • Additional head lengths and diameters available. Contact us for information.
Nominal Head Diameter 1″
Head Length 1″
Machinable Range 7⁄16″–15⁄16″