Value Collection 230-4221 5C Round Collet 21mm

Product Description

The VALUE COLLECTION 230-4221 is a 5C round collet machined from steel for use in 5C-compatible spindles and collet chucks on lathes, milling machines, and grinding fixtures. The collet measures 21.00 mm in nominal collet size and holds a total indicated runout (TIR) of 0.015 mm, making it suitable for precision turning and workholding applications where concentricity matters. The 1.041-24 internal thread and 1.242-20 external thread conform to standard 5C geometry. At 0.51 pounds, the part ships as a single collet. Licensed machinists and toolroom technicians are the primary installers.

This collet is designed for standard 5C collet-style spindles commonly found on bench lathes, bar-feed lathes, indexing fixtures, and rotary tables in light to medium production environments. It is appropriate for both manual and CNC turning setups where a 5C nose style is specified. The UNSPSC code 27112800 classifies it within cutting and holding tools. No special adapters are required beyond a standard 5C-compatible spindle or chuck body.

Key Features

• 5C round collet style for broad compatibility with standard 5C spindle tooling
• 21.00 mm nominal collet size for consistent workholding
• TIR of 0.015 mm for precision concentricity in turning and grinding operations
• Steel construction for durability under repetitive clamping loads
• 1.041-24 internal thread and 1.242-20 external thread per standard 5C geometry

Compatibility

Designed as a standard-geometry 5C round collet replacement for use in any 5C-compatible spindle, collet chuck, or indexing fixture that accepts the 1.242-20 external thread specification.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before inserting or removing the collet, ensure the spindle is fully de-energized and at a complete stop. Thread the collet into the spindle nose by hand first to confirm clean thread engagement before applying a collet wrench. Inspect collet bore and threads for chips or burrs prior to each use, as contamination directly affects TIR.