Value Collection 230-4448 5C Expanding Collet Steel

Product Description

The VALUE COLLECTION 230-4448 is a 5C expanding collet machined from steel, designed for use in lathes, collet chucks, and indexing fixtures that accept the 5C collet standard. Expanding collets grip workpieces from the inside bore rather than the outside diameter, making them the correct choice when a part must be held by an internal surface for secondary operations. The collet has a head diameter of 4 inches and a head length of 2.5 inches, with a concentricity (TIR) rating of 0.0020 inches. Internal and external threads are precision-cut to maintain repeatable runout across setups.

This expanding collet is suited for machine shops, tool rooms, and production environments where workholding from an internal bore is required. Typical applications include holding rings, bushings, sleeves, and other hollow or bored workpieces for turning, grinding, or inspection operations. The steel construction provides the rigidity and wear resistance expected in production machining environments. A licensed machinist or toolroom technician is the typical end user.

Key Features

• Expanding collet design grips internal bores for secondary-operation workholding
• Head diameter: 4 inches; head length: 2.5 inches
• Grip range: 0.7500 inches minimum to 3.9375 inches maximum
• Concentricity (TIR): 0.0020 inches for repeatable runout
• Internal thread: 1.041 inches-24; external thread: 1.242 inches-20
• Steel construction for rigidity and wear resistance

Compatibility

Designed for use in workholding systems that accept the standard 5C collet form factor, including lathes, collet chucks, and rotary indexing fixtures configured for 5C expanding collets.

Installation Notes

Installation should be performed by a qualified machinist familiar with 5C collet workholding systems. Power down and lock out the machine spindle before installing or removing the collet. Inspect the collet seat and mating chuck surfaces for burrs or contamination before seating the collet, as debris at the interface directly affects runout. Do not exceed the stated grip range, as overextension can damage the collet body or reduce concentricity.