Lyndex-nikken 300-045 Round Collet 45/64 Inch

Product Description

The LYNDEX-NIKKEN 300-045 is a round collet designed for precision workholding in CNC machining and toolholding applications. It accepts a 45/64-inch bore size and features a 1.988-20 external thread for secure mounting in compatible collet chucks and holders. With an overall length (OAL) of 3-3/4 inches and a total indicator runout (TIR) of 0.0011 inches, this collet delivers the concentricity and repeatability that production machining environments demand. It is suited for shops running close-tolerance turning, milling, or grinding operations where workpiece runout directly affects part quality and tool life.

This collet is used in machine shops handling precision turning and milling operations, both in job-shop and production-floor environments. It fits into collet chucks that accept the 1.988-20 external thread specification. The 45/64-inch bore accommodates round stock or tooling shanks of that diameter. Machinists and CNC setup technicians are the primary installers, typically in operations where tight runout control is critical to maintaining dimensional tolerances.

Key Features

• 45/64-inch bore size for precise round stock or shank clamping
• 1.988-20 external thread for positive chuck engagement
• 3-3/4-inch overall length for standard reach in compatible holders
• 0.0011-inch TIR for high concentricity and reduced runout
• Round collet design for symmetric clamping force distribution

Compatibility

Designed as an OEM-style replacement or standard-fit collet for collet chucks and holders accepting a 1.988-20 external thread and a 45/64-inch bore size.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle and collet chuck are fully de-energized and at rest before inserting or removing the collet. Clean the chuck bore and collet surfaces thoroughly before installation to prevent contamination that can increase runout beyond the rated TIR. Do not exceed the chuck manufacturer's specified clamping torque for this thread size.