Lyndex-nikken 300-028 Round Collet 7/16 Inch

Product Description

The LYNDEX-NIKKEN 300-028 is a round collet designed for precision workholding in CNC machining and manual machine tool applications. It accepts a 7/16 inch round shank and features a 1.988-20 external thread for secure mounting in compatible collet chucks and holders. Overall length measures 3-3/4 inches. The collet holds a Total Indicator Runout (TIR) of 0.0011 inches, making it suitable for applications where concentricity and repeatability are critical. Installation and removal are handled by qualified machinists and toolroom technicians working with precision spindle and workholding equipment.

This collet is used in machine shop environments for holding round-shank tooling or workpieces in lathes, mills, and similar machine tools that accept the 1.988-20 threaded collet interface. It is appropriate for both production and job-shop settings where consistent grip and low runout are required for turning, milling, or grinding operations on round stock or cylindrical tool shanks.

Key Features

• 7/16 inch capacity for round shanks
• 1.988-20 external thread for secure chuck interface
• 3-3/4 inch overall length for standard toolholding reach
• 0.0011 inch TIR for high concentricity and repeatability
• Round collet design for cylindrical workpiece and tooling retention

Compatibility

Designed for use in collet chucks and holders that accept the 1.988-20 external thread interface and are compatible with 7/16 inch round collets.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the collet from the chuck body. Use the appropriate collet wrench or chuck key specified for the collet chuck being used. Inspect the collet bore and seating surfaces for chips or debris before installation to maintain specified TIR.