Value Collection 231-0025 R8 Collet Set 25 Pc

Product Description

The VALUE COLLECTION 231-0025 is a 25-piece R8 collet set covering a capacity range of 1/8 inch (0.1250 inch) to 7/8 inch (0.8750 inch) in 1/32-inch increments. Designed for R8-spindle milling machines, this set gives machinists and toolroom technicians a full spread of collet sizes in a single purchase. Total indicated runout (TIR) is held to 0.0007 inch, supporting accurate milling, drilling, and light boring operations. The set is suited for job shops, maintenance facilities, and vocational training environments where a broad collet selection is needed without sourcing individual sizes.

This collet set is intended for use with R8-spindle Bridgeport-style vertical knee mills and compatible manual milling machines commonly found in machine shops, maintenance departments, and fabrication facilities. All 25 collet sizes are included in one package, covering the full 1/32-inch step progression from 1/8 inch through 7/8 inch. This makes the set practical for shops running a variety of end mill shank sizes, drill shanks, and boring bar shanks without needing to stock individual collets separately.

Key Features

• R8 collet system — compatible with R8-spindle milling machines
• 25 pieces covering 1/8 inch to 7/8 inch in 1/32-inch increments
• TIR of 0.0007 inch for consistent tool runout control
• Full size progression: 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, 1/2, 17/32, 9/16, 19/32, 5/8, 21/32, 11/16, 23/32, 3/4, 25/32, 13/16, 27/32, 7/8 inch
• Single-purchase solution eliminates the need to source collets individually

Compatibility

Designed for use with R8-spindle milling machines. Verify that the host machine spindle accepts the R8 taper before installation.

Installation Notes

R8 collets are installed and removed by a licensed machinist or qualified shop technician. Power down and lock out the milling machine spindle before changing collets. Use the correct drawbar wrench for the machine spindle — never overtighten the drawbar, as this can damage the collet or spindle taper. Inspect each collet bore and taper for chips or burrs before seating a tool.