Value Collection 230-4438 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4438 is a 5C expanding collet machined from steel for use in lathes, collet chucks, and indexing fixtures that accept the 5C collet standard. Expanding collets grip the internal bore of a workpiece rather than the outside diameter, making them the right choice when the outer surface must remain unmarked or when a through-bore reference is required. The collet features a 3-inch head diameter and a 1.5-inch head length, with a stated concentricity (TIR) of 0.0020 inches. Internal and external threads allow proper seating and draw-tube actuation within a compliant 5C-style spindle or fixture.

This expanding collet is suited for precision turning, grinding, and secondary operations in machine shops running 5C-compatible equipment. It is used in both manual lathes and CNC turning centers equipped with 5C collet closers. The grip range spans from 0.75 inches minimum to 2.9375 inches maximum, covering a wide range of bore diameters in a single collet body. Installation is performed by qualified machinists or toolroom technicians during setup.

Key Features

• Expanding collet design grips internal workpiece bores without marking exterior surfaces
• Steel construction for durability under repeated clamping cycles
• Concentricity (TIR) of 0.0020 inches for consistent part-to-part repeatability
• Grip range of 0.75 inches to 2.9375 inches accommodates a broad range of bore sizes
• Internal thread size of 1.041 inches-24 and external thread size of 1.242 inches-20 for standard 5C draw-tube compatibility
• 3-inch head diameter with 1.5-inch head length fits standard 5C spindle noses and fixtures

Compatibility

Designed as an OEM-style replacement or direct-fit component for lathes, collet chucks, and indexing fixtures built to the 5C collet standard.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing any collet. Inspect collet threads and the spindle bore for debris or damage before seating the collet. Do not exceed the stated grip range, as improper sizing can reduce concentricity and damage the collet or workpiece.