Value Collection 230-4444 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4444 is a 5C expanding collet machined from steel for use in lathes, grinding machines, and other spindle-driven equipment that accepts the 5C collet standard. The collet expands outward to grip workpieces from their interior bore or outer diameter, making it suitable for secondary operations where external gripping is not practical. It features a head diameter of 4 inches, a head length of 1 inch, and a concentricity rating of 0.0020 inches TIR, providing repeatable, accurate workholding for precision turning and grinding applications. Installation and changeover are performed by machinists and toolroom technicians.

This expanding collet is intended for use in production and toolroom environments where 5C-compatible spindles are in service. Its grip range spans 0.7500 inches minimum to 3.9375 inches maximum, accommodating a wide variety of workpiece bore sizes in a single collet style. The internal thread size is 1.041 in-24 and the external thread size is 1.242 in-20, allowing proper engagement with standard 5C collet closers and fixtures. It is suited for both short-run job shop work and higher-volume production turning setups.

Key Features

• Expanding collet design grips workpieces from the interior bore for secondary-operation setups
• Steel construction for rigidity and durability in lathe and grinding applications
• Concentricity of 0.0020 inches TIR for accurate, repeatable workholding
• Wide grip range from 0.7500 inches to 3.9375 inches covers a broad range of bore sizes
• Internal thread 1.041 in-24 and external thread 1.242 in-20 for standard 5C collet closer compatibility
• Head diameter of 4 inches and head length of 1 inch suit common 5C spindle configurations

Compatibility

Designed as a direct-fit replacement or supplemental collet for machine tools equipped with standard 5C collet spindles and closers.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and de-energize the machine spindle completely before inserting or removing the collet. Ensure the collet closer threads engage fully and that mating surfaces are clean and free of chips before tightening. Do not overtighten the closer draw tube, as this can distort the collet and degrade concentricity.