Value Collection 230-4449 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4449 is a 5C expanding collet machined from steel for use in lathes, collet closers, and rotary fixtures that accept the 5C collet standard. Expanding collets grip from the inside of a bore rather than the outside of a workpiece, making them the correct choice when securing parts that must be held by an internal diameter. This collet features a 5-inch head diameter, a 2-inch head length, and a concentricity rating of 0.0020 inches TIR, providing repeatable, accurate workholding for turned parts and second-operation machining.

This expanding collet is suited for manual and CNC lathe setups in production and job-shop environments where internal-diameter workholding is required. It handles a grip range from 0.75 inches minimum to 3.9375 inches maximum, covering a wide span of bore sizes in a single tool. The steel construction resists deformation under clamping load and holds up in high-cycle production use. Machinists and toolroom technicians performing second-operation turning or fixture work are the primary installers of this collet.

Key Features

• Expanding collet design grips workpieces at an internal diameter for second-operation and bore-referencing setups
• Concentricity of 0.0020 inches TIR for repeatable, accurate workholding
• Grip range: 0.75 inches minimum to 3.9375 inches maximum
• 5-inch head diameter and 2-inch head length for standard 5C-compatible spindles and fixtures
• Internal thread size 1.041 in-24 and external thread size 1.242 in-20
• Steel construction for durability under repeated clamping cycles

Compatibility

Designed as an OEM-style replacement or direct-fit expanding collet for lathes, collet closers, and rotary fixtures built to the 5C collet standard.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians familiar with 5C collet systems. Before inserting or removing the collet, power down the lathe or machine spindle completely and confirm the chuck or collet closer is fully released. Inspect the collet seat and closer nose for chips or debris before seating the collet, as contamination directly affects runout. Thread engagement should be checked against the internal and external thread specifications to ensure proper fit before applying clamping force.