Lyndex-nikken 164-056 Square Collet 7/8 Inch

Product Description

The LYNDEX-NIKKEN 164-056 is a square collet designed for precision workholding in CNC machining and toolholding applications. It accepts 7/8-inch square stock and seats with a 1-11/16-20 internal thread and an M47.5 x 1.75 external thread, making it compatible with collet chucks that use this threading standard. With a total indicator runout (TIR) of 0.0011 inches and an overall length (OAL) of 4.31 inches, this collet delivers the tight tolerances required for production machining environments. Machinists and tool crib personnel working with square-profile workpieces rely on this collet to maintain concentricity and repeatability at the spindle.

This square collet is suited for use in machining centers, lathes, and collet chuck systems configured for square stock gripping. It is a direct-mount component installed into compatible collet chucks that accept the M47.5 x 1.75 external thread. Typical use cases include milling and turning of square bar stock in job shops, production cells, and toolroom environments. The 7/8-inch bore size makes it appropriate for gripping standard square stock at that dimension without adapter sleeves or additional tooling.

Key Features

• 7/8-inch square bore for direct gripping of square stock
• TIR of 0.0011 inches for high-precision concentricity
• 4.31-inch overall length for standard collet chuck reach
• 1-11/16-20 internal thread for secure chuck engagement
• M47.5 x 1.75 external thread for compatibility with matching chuck bodies

Compatibility

Designed for use with collet chuck systems that accept the M47.5 x 1.75 external thread and 1-11/16-20 internal thread standard. Consult your chuck manufacturer specifications to confirm fitment before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. The spindle and machine must be fully powered down and locked out before collet installation or removal. Use the appropriate collet wrench and chuck key for your specific chuck body - do not use improvised tools that could damage thread engagement surfaces. Verify TIR with a dial indicator after seating to confirm proper collet seating and runout compliance.