Value Collection 230-4373 5C Step Collet Steel

Product Description

The VALUE COLLECTION 230-4373 is a 5C step collet machined from steel, designed for use in lathes, collet chucks, and indexing fixtures that accept the 5C collet standard. Step collets grip workpieces with non-standard or stepped diameters that a conventional 5C collet cannot hold directly. This collet features a 3 inch head diameter and a 5/16 inch (0.3125 inch) pilot hole, making it suitable for holding smaller-diameter round stock or pre-drilled workpieces. It is installed and serviced by machinists, toolroom technicians, and CNC setup personnel working with 5C-compatible spindles and fixtures.

Step collets in the 5C form factor are widely used in production and toolroom environments on manual lathes, CNC turning centers with 5C-style closers, rotary indexers, and collet blocks. This steel construction provides the rigidity and dimensional stability needed for repetitive workholding applications. The 1-1/8 inch head thickness and precise internal and external thread sizing ensure proper seating in standard 5C spindle noses and collet closers without modification.

Key Features

• 5C step collet profile accepts workpieces that standard 5C collets cannot grip directly
• Steel construction for rigidity and long service life in production environments
• 3 inch head diameter fits standard 5C collet chuck and closer bores
• 5/16 inch (0.3125 inch) pilot hole for small-diameter round or pre-machined stock
• Internal thread size 1.041 inches at 24 TPI for proper collet closer engagement
• External thread size 1.242 inches at 20 TPI for spindle nose compatibility

Compatibility

Designed as an OEM-style replacement and standard fitment for lathes, rotary indexers, and collet fixtures that accept the 5C collet form factor.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the spindle drive before inserting or removing any collet. Inspect the collet taper, threads, and seating bore for chips or debris before installation, and clean all mating surfaces. Do not exceed the workpiece diameter range stamped or listed for this collet, as overloading a step collet can damage the spindle nose threads or cause workpiece ejection.