Value Collection 230-4435 5C Expanding Collet

Product Description

The VALUE COLLECTION 230-4435 is a 5C expanding collet machined from steel for use in lathes, collet closers, and rotary fixtures that accept the 5C collet standard. The expanding design grips workpieces from the inside, making it suited for second-operation and ID-holding applications. It carries a stated concentricity (TIR) of 0.0020 decimal inches, a head diameter of 2.5 inches, and a head length of 3 inches. The internal thread is 1.041 inches at 24 threads per inch and the external thread is 1.242 inches at 20 threads per inch. Machinists, toolroom technicians, and production setup personnel are the typical installers.

This expanding collet is used in production turning, cylindrical grinding, and fixture work where a bore or internal surface is the reference datum. It accommodates a grip range from 0.75 inches (minimum) to 2.4375 inches (maximum), covering a wide spread of workpiece bore sizes in a single tooling body. Typical environments include job shops and production cells running steel, aluminum, and similar materials on 5C-compatible spindles.

Key Features

• Expanding collet design grips workpieces by internal diameter for second-operation setups
• Concentricity (TIR): 0.0020 decimal inches for precise, repeatable workholding
• Wide grip range: 0.75 inches minimum to 2.4375 inches maximum
• Steel construction for rigidity and wear resistance under repeated clamping cycles
• Internal thread 1.041 in-24 and external thread 1.242 in-20 for standard 5C compatibility
• Head diameter 2.5 inches, head length 3 inches

Compatibility

Designed for use with lathes, collet closers, and rotary fixtures built to the 5C collet standard.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before inserting or removing the collet, ensure the spindle is fully stopped and the machine is powered down or in a safe lockout state. Threads should be inspected for damage or contamination before seating; clean threads with an appropriate solvent and lint-free cloth. Do not exceed the stated grip range, as over-ranging an expanding collet can damage the collet body or the workpiece bore.