Value Collection 231-4750 R8 Collet 25/32 Inch Steel

Product Description

The VALUE COLLECTION 231-4750 is a steel R8 collet designed for use in milling machines equipped with an R8 spindle taper. This collet holds 25/32 inch round workholding tooling or cutting tools, securing them concentrically within the spindle for accurate material removal. It features a 7/16-20 drawbar thread for proper engagement with the machine drawbar and carries a TIR (Total Indicator Runout) of 0.0007 inches, supporting consistent cutting accuracy. Machinists and tool room technicians install this collet as a standard component in manual and CNC-style knee mills or Bridgeport-type machines where R8 toolholding is required.

This collet is suited for machine shop environments including general fabrication, toolroom work, and production milling where R8 spindle compatibility is standard. It accepts 25/32 inch shanks and is installed by machinists performing tool changes or setting up milling operations. The all-steel construction provides durability under typical milling loads and repeated tightening cycles. This is an individual collet sold as a single unit, appropriate for shops building out or replacing components in an R8 collet set.

Key Features

• 25/32 inch bore diameter for direct shank fitment
• R8 taper profile compatible with standard R8 spindle machines
• 7/16-20 drawbar thread for secure drawbar engagement
• 0.0007 inch TIR for consistent tool concentricity
• All-steel construction for durability under milling loads

Compatibility

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

Installation Notes

Installation and removal of R8 collets is performed by qualified machinists. Always power down and lock out the machine spindle before inserting or removing a collet. Thread the drawbar fully into the collet before tightening, and do not overtighten the drawbar as this can damage the collet taper or spindle bore. Inspect the collet bore and spindle taper for chips or debris before each installation to maintain TIR performance.