Value Collection 530-4224 5C Square Collet 3/8 Inch

Product Description

The VALUE COLLECTION 530-4224 is a 5C-style square steel collet designed for use in 5C-compatible collet chucks, indexers, and spin fixtures on manual and CNC lathes and milling setups. It accepts 3/8-inch square stock and holds a Total Indicator Runout (TIR) of 0.0005 inches, which is suitable for precision turning and secondary operations on square workpieces. The internal thread measures 1.041 inches at 24 threads per inch and the external thread measures 1.242 inches at 20 threads per inch. Machined from steel, this collet provides the rigidity and wear resistance required for repeated production use in a machine shop environment.

This collet is intended for use in 5C collet chucks, collet closers, indexing heads, and rotary fixtures where square-bore workholding is required. Typical applications include holding square bar stock for turning, threading, or chamfering operations. It is used primarily in manual lathe, turret lathe, and CNC lathe setups equipped with a 5C spindle. Machinists and toolroom technicians working with square stock in the 3/8-inch range will find this a direct-fit replacement or new installation option for standard 5C tooling systems.

Key Features

• 3/8-inch square bore for positive grip on square bar stock
• TIR of 0.0005 inches for precision workholding accuracy
• Internal thread: 1.041 inches at 24 threads per inch for standard 5C closer compatibility
• External thread: 1.242 inches at 20 threads per inch
• Steel construction for durability and resistance to deformation under clamping loads

Compatibility

Designed as a standard 5C-style replacement or new-installation collet for use with 5C collet chucks, closers, indexing fixtures, and rotary tables that accept the 1.242 inch-20 external thread standard.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. The spindle or collet chuck must be fully de-energized and brought to a complete stop before installing or removing collets. Inspect the collet closer, chuck bore, and threads for wear or contamination before seating the collet. Do not force a collet into a chuck bore; misalignment or debris can damage threads and degrade runout performance.