Lyndex-nikken 820-003 R8 Collet 3mm Steel

Product Description

The LYNDEX-NIKKEN 820-003 is a 3mm R8 collet machined from steel for use in vertical milling machines equipped with an R8 spindle taper. It accepts a 3mm tool shank and features a 7/16-20 drawbar thread for secure spindle engagement. The collet holds a total indicated runout (TIR) of 0.0007 inches, supporting accurate tool positioning in precision milling operations. At 0.4 pounds, it is a compact, single-piece toolholding component installed by machinists and toolroom technicians in job shop and production environments.

This collet is suited for use in knee mills, bed mills, and similar vertical machining centers that use the R8 spindle interface - a standard found widely in Bridgeport-style and compatible machines. It is appropriate for holding 3mm end mills, drills, reamers, and other round-shank cutting tools in light to medium milling and drilling operations. The 7/16-20 drawbar thread matches the standard R8 drawbar used in most R8-spindle machines.

Key Features

• 3mm collet bore for precise clamping of 3mm round-shank tooling
• R8 taper profile for direct spindle mounting without an additional adapter
• 0.0007-inch TIR for tight runout control in precision milling applications
• 7/16-20 drawbar thread matches standard R8 drawbar specification
• Steel construction for durability and resistance to clamping-load deformation

Compatibility

Designed as an OEM-style replacement or direct-fit collet for R8-spindle vertical milling machines requiring a 3mm bore and a 7/16-20 drawbar thread.

Installation Notes

R8 collets are installed and removed by a machinist or toolroom technician. Power down and lock out the machine spindle before changing collets. Clean the spindle bore and collet taper thoroughly before insertion to prevent runout caused by chips or debris. Engage the drawbar fully and tighten to the machine manufacturer's specified feel - do not overtighten, as this can damage the collet or spindle bore.