Lyndex-nikken 300-056 Round Collet 7/8 Inch

Product Description

The LYNDEX-NIKKEN 300-056 is a round collet designed for precision workholding in CNC machining and manual milling applications. It accepts a 7/8 inch round workpiece and features a 1.988-20 external thread for secure mounting in compatible collet chucks. The overall length is 3.75 inches, and the collet holds a total indicator runout (TIR) of 0.0011 inches, providing the concentricity accuracy that production machining and toolroom work demand. Licensed machinists and CNC setup technicians are the primary installers of this component.

This collet is suited for use in machine shops running CNC turning centers, milling machines, or manual lathes that accept the 1.988-20 external thread standard. It is appropriate for both production environments and toolroom applications where consistent grip and minimal runout are required when holding round bar stock, drill blanks, or round-shank tooling.

Key Features

• 7/8 inch capacity for round workpieces and round-shank tooling
• 1.988-20 external thread provides positive engagement with compatible collet chucks
• 0.0011 inch TIR supports tight-tolerance workholding requirements
• 3.75 inch overall length suits standard collet chuck depth requirements
• Round collet geometry for consistent 360-degree clamping contact

Compatibility

Designed as an OEM-style replacement or direct-fit collet for collet chuck systems accepting a 1.988-20 external thread and 7/8 inch bore capacity.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician with the spindle or chuck fully stopped and machine power locked out per shop lockout/tagout procedures. Clean the collet bore and chuck threads before seating to prevent contamination that degrades runout performance. Do not exceed the chuck manufacturer's recommended torque range when tightening, and inspect the collet for wear or damage before each use.