Accupro 785056 ER40 Collet 0.719 Inch

Product Description

The ACCUPRO 785056 is an ER40 series collet designed to hold cutting tools and workpieces in CNC machining centers, milling machines, and lathes equipped with ER40 collet chucks. It accepts a nominal tool shank diameter of 0.719 inches, with a minimum collet capacity of 0.688 inches, giving machinists a reliable clamping range for standard tooling in that size class. The collet provides concentric, rigid tool holding to support accurate material removal across a range of cutting operations. Machinists and tool room technicians install this collet as part of routine tooling setups.

This collet is suited for production and job shop environments running ER40-compatible spindles. It fits standard ER40 collet chucks used in vertical machining centers, horizontal mills, and turning applications where ER-style clamping is specified. The 0.719-inch size accommodates tooling at that shank diameter and is a common fit in shops running inch-dimensioned cutting tools.

Key Features

• ER40 collet series for use with ER40-standard collet chucks
• Nominal capacity of 0.719 inches with a minimum collet capacity of 0.688 inches
• Compact geometry: 2 inches in height, 1.75 inches in width, 1.75 inches in length
• Single-piece collet construction for concentric tool clamping
• Packaged individually for straightforward single-unit replacement or tooling builds

Compatibility

Designed for use with ER40-standard collet chucks on CNC machining centers, manual mills, and lathes that accept the ER40 collet system.

Installation Notes

Installation is performed by machinists or tool room technicians during tooling setup. Before changing collets, ensure the spindle is fully stopped and the machine is in a safe, powered-down state per shop lockout/tagout procedures. Insert the collet into the ER40 chuck before threading on the nut, then tighten with an appropriate collet nut wrench to the chuck manufacturer's specification. Inspect the collet for wear, nicks, or out-of-round bore before each use to maintain runout accuracy.