Value Collection 230-4374 5C Step Collet Steel

Product Description

The VALUE COLLECTION 230-4374 is a 5C step collet machined from steel, designed for use in lathes and collet-closer systems that accept the standard 5C collet format. Step collets are used when workpieces exceed the bore capacity of a standard 5C collet, allowing the collet to grip on a step or shoulder rather than along a full bore. The head measures 4 inches in diameter with a 1-1/8 inch head thickness. The pilot hole accepts stock up to 0.3125 inches (5/16 inch). 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. This collet is suited for machinists and toolroom technicians working in production or job-shop environments.

This collet is intended for use in manual and CNC lathes, indexers, spin fixtures, and other workholding equipment configured for the 5C collet standard. Step collets are a common solution in production machining when round, hex, or square bar stock or pre-turned workpieces must be held by a shoulder or step rather than along the full shank length. Installation is performed by qualified machinists or toolroom personnel on equipment already set up for 5C collet tooling.

Key Features

• Step collet design accommodates workpieces gripped by shoulder rather than full-bore contact
• Steel construction for durability in production machining environments
• 4 inch head diameter fits standard 5C collet-closer equipment
• Pilot hole size of 0.3125 inches (5/16 inch) for workpiece alignment
• Internal thread: 1.041 inches at 24 TPI; external thread: 1.242 inches at 20 TPI
• Head thickness of 1-1/8 inch for proper seating in compatible closers

Compatibility

Designed as an OEM-style replacement or production tooling component for lathes and workholding systems configured for the standard 5C collet format.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. The spindle or collet-closer must be fully powered down and brought to a complete stop before inserting or removing a collet. Inspect the collet bore, threads, and seating surface for damage or debris before installation. Do not exceed the rated pilot hole capacity, as overloading a step collet can cause workpiece slip or collet damage.