Value Collection 230-4212 5C Round Collet 12mm Steel

Product Description

The VALUE COLLECTION 230-4212 is a 5C round collet machined from steel for use in standard 5C collet chucks, closers, and fixtures found on lathes, grinders, and milling machines. With a collet size of 12.00 mm and a Total Indicator Runout (TIR) of 0.015 mm, this collet delivers the concentricity required for precision turning and grinding operations. The internal thread measures 1.041 inches-24 and the external thread measures 1.242 inches-20, conforming to standard 5C dimensional specifications. It is installed by machinists and toolroom technicians in production and job-shop environments where consistent workholding accuracy is essential.

This 5C round collet is suited for holding round-bar stock in close-tolerance turning, second-operation work, and light grinding applications. It fits standard 5C collet chucks and collet closers commonly found on manual engine lathes, CNC turning centers equipped with 5C spindles, and surface grinder workholding fixtures. The round form makes it appropriate for cylindrical workpieces requiring firm, repeatable clamping without jaw marks.

Key Features

• 5C round collet profile fits standard 5C spindle tooling and closers
• 12.00 mm collet size for precision round-bar workholding
• TIR of 0.015 mm for close-tolerance turning and grinding
• Steel construction for durability under repeated clamping cycles
• Standard internal thread of 1.041 inches-24 and external thread of 1.242 inches-20

Compatibility

Designed as a standard 5C-style round collet replacement for use with any 5C-compatible collet chuck, collet closer, or indexing fixture accepting the standard 5C external thread specification.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the collet from the closer or chuck. Inspect the collet bore, taper, and threads for chips or burrs before seating, as contamination directly affects runout. Do not exceed the rated collet capacity, as over-loading the collet bore will damage the collet and reduce clamping accuracy.