Value Collection 231-4805 R8 Round Collet 5mm Steel

Product Description

The VALUE COLLECTION 231-4805 is a 5mm R8 round collet machined from steel for use in milling machine spindles with the standard R8 taper. The collet accepts a 5mm tool shank and features a 7/16-20 drawbar thread for positive retention during cutting operations. Total indicator runout (TIR) is rated at 0.0007 inches, providing the concentricity needed for accurate milling, drilling, and light boring work. This collet is installed and serviced by machinists and tool room technicians in job shop and production environments.

R8 collets are designed for Bridgeport-style vertical knee mills and compatible machines that use the R8 spindle taper. This 5mm size is particularly useful when holding metric end mills, drills, and other small-diameter cutting tools. The steel construction provides durability under repeated tightening and release cycles in standard shop conditions.

Key Features

• 5mm collet bore accepts metric shank tooling
• R8 taper profile fits standard vertical knee mill spindles
• 7/16-20 drawbar thread for secure spindle retention
• 0.0007 inch TIR for accurate tool concentricity
• Steel construction for durability and repeated use

Compatibility

Designed as an OEM-style replacement or supplemental collet for vertical milling machines equipped with an R8 spindle taper and a 7/16-20 drawbar thread.

Installation Notes

R8 collets are installed by machinists and tool room personnel. Power down and lock out the machine spindle before inserting or removing the collet. Ensure the spindle bore and collet taper are clean and free of chips before seating. Tighten the drawbar to the machine manufacturer's specification using the appropriate drawbar wrench.