Value Collection 230-4427 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4427 is a 5C expanding collet machined from steel for use in lathes and collet fixtures that accept the 5C spindle standard. Expanding collets grip workpieces from the inside, making them the right choice when the bore or inner diameter of a part needs to be held for turning, grinding, or inspection operations. The 230-4427 has a head diameter of 2 inches, a head length of 2 inches, and a concentricity (TIR) of 0.0020 inches, which supports repeatable, accurate workholding across production runs. Machinists and toolroom technicians are the primary installers and users of this type of collet.

This expanding collet is suited for metalworking applications in machine shops, toolrooms, and production environments running 5C-compatible lathes, rotary tables, or collet fixtures. It grips workpieces with internal diameters from 0.7500 inches (3/4 inch) up to 1.9375 inches (1-15/16 inch), covering a practical range of bore sizes common in turned and bored components. The internal thread size is 1.041 inches at 24 threads per inch, and the external thread size is 1.242 inches at 20 threads per inch. Steel construction provides the durability needed for repeated clamping cycles in shop-floor conditions.

Key Features

• Expanding collet design grips workpieces from the inside bore for ID workholding
• Steel construction for durability and resistance to deformation under clamping load
• 0.0020 inch TIR concentricity for consistent, repeatable part positioning
• Grip range from 0.7500 inches to 1.9375 inches covers a wide range of bore sizes
• 2 inch head diameter and 2 inch head length in standard 5C form factor
• Internal thread 1.041 inches at 24 TPI and external thread 1.242 inches at 20 TPI for proper collet closer engagement

Compatibility

Designed as an OEM-style replacement or direct-use expanding collet for machine tools and fixtures built to accept the 5C collet standard.

Installation Notes

Installation of a 5C expanding collet is performed by a machinist or toolroom technician. Power down and lock out the spindle drive before seating or removing the collet from the fixture or lathe. Inspect collet threads and the mating collet closer threads for wear or damage before installation. Do not force the collet into the spindle; proper thread engagement should be smooth and free of resistance.