Value Collection 230-4431 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4431 is a 5C expanding collet machined from steel for use in lathes, collet chucks, and other 5C-compatible workholding fixtures. Unlike standard closing collets, this expanding type grips the internal bore of a workpiece, making it the correct choice when the part must be held from the inside out. It features a head diameter of 2.5 inches, a head length of 1 inch, and a concentricity rating of 0.0020 inches TIR, providing the repeatable runout control that precision turning and grinding operations demand. Installation is handled by machinists and toolroom technicians working with 5C-standard spindle equipment.

This collet is suited for production and job-shop environments where inside-diameter workholding is required on 5C-equipped lathes, indexers, and collet fixtures. It accommodates a minimum grip of 0.75 inches and a maximum grip of 2.4375 inches, covering a wide range of bore diameters in a single tool. The internal thread is 1.041 inches-24 and the external thread is 1.242 inches-20, matching standard 5C closer and chuck configurations. Steel construction handles the clamping loads typical of turning, milling, and grinding applications.

Key Features

• Expanding collet design grips workpieces from the inside diameter
• 0.0020 inches TIR concentricity for repeatable, low-runout workholding
• Grip range from 0.75 inches to 2.4375 inches covers a broad workpiece bore span
• Head diameter of 2.5 inches and head length of 1 inch in standard 5C form factor
• Internal thread 1.041 inches-24 and external thread 1.242 inches-20 for 5C compatibility
• Steel construction for durability under production clamping loads

Compatibility

Designed as an OEM-style replacement and standard fit for 5C collet-compatible lathes, collet chucks, indexers, and rotary fixtures that accept the 5C collet standard.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the spindle drive before inserting or removing any collet. Ensure the collet bore, closer threads, and spindle nose are clean and free of chips before seating the collet. Do not exceed the collet grip range, as overloading an expanding collet can cause permanent distortion and loss of concentricity.