Accupro 587342 ER25 Collet 0.314 Inch 8.00mm

Product Description

The ACCUPRO 587342 is an ER25 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER25 toolholders. The collet grips cutting tools and workholding shanks with a nominal collet size of 8.00mm (0.314 inches) and a minimum collet capacity of 0.275 inches (7.0mm), giving it a clamping range suited to a variety of tool shank diameters. Total Indicator Runout (TIR) is rated at 0.01mm, supporting accurate, repeatable tool positioning. Machinists and CNC operators install this collet as part of a standard ER25 collet chuck assembly.

This collet is appropriate for production and job-shop machining environments where ER25 tooling is the specified standard. It fits residential machine shops, commercial production floors, and maintenance departments running milling, drilling, or tapping operations. The ER25 series is widely used across light-to-medium-duty CNC and manual spindle applications. This collet ships individually and is suited for single-tool setups or as a replacement for a worn or damaged collet in an existing ER25 chuck system.

Key Features

• ER25 collet series for use with ER25-compatible collet chucks
• Nominal collet size of 8.00mm (0.314 inches)
• Minimum collet capacity of 0.275 inches (7.0mm) for a usable clamping range
• 0.01mm TIR for accurate, low-runout tool positioning
• Single-piece packaging for individual replacement or setup

Compatibility

Designed as a standard ER25-series collet replacement for use in any ER25-compatible collet chuck or toolholder accepting an 8.00mm nominal collet size.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Always de-energize and lock out the spindle drive before changing collets. Inspect the collet chuck bore and collet seating surface for chips or damage before seating the collet. Follow the machine manufacturer torque guidelines for the collet nut, and confirm TIR with an indicator after assembly before beginning a production run.