Value Collection 230-4451 5C Expanding Collet 0.25-0.468 in

Product Description

The VALUE COLLECTION 230-4451 is a 5C expanding collet designed for precision lathe and spindle workholding applications. It grips workpieces from the inside, expanding outward to secure parts within a range of 0.25 to 0.468 inches. Manufactured from steel, this collet delivers a concentricity of 0.0020 inches TIR, making it suitable for operations where runout control is critical. The 230-4451 is installed by machinists and toolroom technicians working with 5C-compatible spindle equipment. Its internal thread size of 1.041 inches-24 and external thread size of 1.242 inches-20 match standard 5C collet closer hardware.

This expanding collet is used in manual lathes, CNC lathes, indexers, and rotary fixtures that accept the 5C collet system. It is well suited for secondary operations where a finished bore or outer diameter must be gripped without marring the surface. Typical applications include light turning, facing, grinding, and inspection fixturing in job shops, production machine shops, and toolrooms. The grip range of 1/4 inch to 15/32 inch covers a broad selection of small-diameter workpieces common in precision machining environments.

Key Features

• Expanding collet design grips workpieces internally from 0.25 to 0.468 inches
• Steel construction for durability under repeated clamping cycles
• 0.0020 inches TIR concentricity for tight runout control
• Internal thread size 1.041 inches-24 compatible with standard 5C closers
• External thread size 1.242 inches-20 for secure spindle engagement
• Head diameter of 1 inch and head length of 1 inch for standard 5C envelope

Compatibility

Designed as an OEM-style replacement or direct-use collet for machine tools equipped with a standard 5C spindle collet system.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lockout the machine spindle before inserting or removing any collet. Ensure the collet closer and spindle threads are clean and free of chips before threading in the collet. Inspect the collet for wear or damage before each use, as a cracked or worn collet can compromise TIR and create a safety hazard.