Accupro 587344 ER25 Collet 0.354 Inch 9.00mm

Product Description

The ACCUPRO 587344 is an ER25 series collet designed for use in CNC machining centers, milling machines, lathes, and other machine tool spindles that accept the ER25 collet system. It holds workpieces or cutting tools with a nominal collet size of 0.354 inches (9.00mm) and delivers a total indicator runout (TIR) of 0.01mm, making it suitable for precision toolholding applications where concentricity is critical. The minimum collet capacity is 0.314 inches (8.0mm), allowing it to grip a range of shank diameters within that span. Machinists and CNC operators install this collet as part of an ER collet chuck assembly.

This collet is intended for use in machine shops, job shops, and production environments running CNC or manual equipment equipped with ER25-compatible collet chucks. It is suited for gripping end mills, drills, reamers, boring bars, and other round-shank tooling or workpiece stock. The ER25 series is widely adopted in both light-duty and medium-duty cutting applications across metalworking, woodworking, and composite machining setups.

Key Features

• ER25 collet series for use with standard ER25 collet chucks
• Nominal collet size of 0.354 inches (9.00mm)
• Minimum collet capacity of 0.314 inches (8.0mm) for gripping smaller shanks
• 0.01mm TIR for precision concentricity in toolholding applications
• Single-piece collet construction for direct spindle chuck installation

Compatibility

Designed for use with ER25-compatible collet chucks and toolholding systems. Refer to your machine tool documentation to confirm ER25 chuck compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the machine spindle before inserting or removing collets. Seat the collet fully into the ER collet nut before threading onto the chuck body, and use an appropriate collet nut wrench to achieve proper clamping torque per the chuck manufacturer specifications. Inspect the collet bore and chuck taper for chips or burrs before assembly to maintain TIR performance.