Value Collection 231-2127 R8 Collet Set 27 Piece

Product Description

The VALUE COLLECTION 231-2127 is a 27-piece R8 collet set designed for use with Bridgeport-style vertical knee mills and other milling machines that accept the R8 spindle taper. The set covers a capacity range from 1/16 inch (0.0625 inch) to 7/8 inch (0.8750 inch) in 1/32-inch increments, giving machinists and toolroom technicians full coverage for common end mill, drill, and toolholder shank sizes. Total indicated runout (TIR) is rated at 0.0007 inch, supporting accurate material removal and repeatable tool positioning across the full range.

This collet set is suited for job shops, maintenance machine shops, and production toolrooms running R8-spindle knee mills. The 27-piece range eliminates the need to source individual collet sizes separately, making it practical for shops that run varied tooling on a single machine. Two 14-piece storage racks are included, keeping collets organized and protected when not in use.

Key Features

• 27-piece set covering 1/16 inch to 7/8 inch in 1/32-inch increments
• R8 collet system for compatibility with R8-spindle milling machines
• TIR of 0.0007 inch for consistent tool concentricity
• Includes two 14-piece storage racks for organized bench storage
• Full fractional inch size range eliminates gap coverage in common tooling diameters

Compatibility

Designed as a direct-fit replacement or supplemental set for milling machines equipped with an R8 spindle taper.

Installation Notes

R8 collets are installed and removed by a qualified machinist or toolroom technician. Power down and lock out the mill spindle drive before changing collets. Use the appropriate drawbar wrench to seat and secure the collet fully in the spindle taper — an improperly seated collet can cause tool pullout under load. Inspect collet bore and taper surfaces for chips or burrs before each installation.