Value Collection 230-4156 5C Round Steel Collet 7/8 Inch

Product Description

The VALUE COLLECTION 230-4156 is a 5C round steel collet sized for 7/8 inch stock, designed for use in 5C-compatible spindles on lathes, rotary indexers, and collet chucks. It holds round workpieces with a total indicator runout (TIR) of 0.0005 inches, delivering the concentricity that precision turning and grinding operations demand. The internal thread measures 1.041 inches at 24 threads per inch, and the external thread measures 1.242 inches at 20 threads per inch. Machined from steel for rigidity and wear resistance, this collet is a standard replacement or additional-capacity piece for machine shops and tool rooms running 5C tooling systems.

This collet fits production and job-shop environments where 5C collet systems are the standard workholding method. Typical applications include CNC and manual lathes, spin fixtures, and indexing heads that accept 5C collets. It is suited for holding round bar stock, pins, and turned parts up to 7/8 inch in diameter. Machinists, tool room operators, and production setup technicians are the primary installers and users of this component.

Key Features

• 7/8 inch capacity for round workpieces in 5C spindle systems
• 0.0005 inch TIR for high-concentricity workholding
• 1.041 inch-24 internal thread matches standard 5C collet closer specifications
• 1.242 inch-20 external thread for positive engagement in the spindle nose
• Steel construction provides durability and resistance to deformation under clamping load

Compatibility

Designed as an OEM-style replacement or supplemental collet for machine tool spindles and fixtures built to the standard 5C collet specification.

Installation Notes

Installation should be performed by a qualified machinist or tool room technician familiar with 5C collet systems. Ensure the spindle, collet closer, and chuck are fully de-energized and the machine is locked out before inserting or removing the collet. Inspect the collet bore and spindle taper for chips or burrs before seating; debris will compromise runout. Thread engagement should be smooth and free of binding — do not force the collet into a mismatched or damaged spindle nose.