Accupro ER-40-LTF Spanner Wrench Er Collet Chuck

Product Description

The ACCUPRO ER-40-LTF is a spanner wrench designed for tightening and loosening ER-style collet chucks in CNC machining and toolholding applications. Built to work across multiple ER collet series, this wrench provides the grip and leverage needed to properly seat and release collets without damaging the chuck nut. It is a standard shop tool for machinists and toolroom technicians working with milling machines, machining centers, and other spindle-driven equipment. At 1.6 pounds and compact enough for a toolbox drawer, it is a practical addition to any CNC setup station.

This wrench is used in production machining shops, job shops, and toolrooms where ER collet systems are common. It is appropriate for both setup technicians and machine operators who regularly change tooling. The ER-40-LTF is compatible with ER11, ER20, ER25, and ER40 collet chucks as well as pull studs and retention knobs, making it a versatile single wrench for multiple chuck sizes on the same floor.

Key Features

• Compatible with ER11, ER20, ER25, and ER40 collet series
• Spanner-style design for positive engagement on collet chuck nuts
• Also fits pull studs and retention knobs
• Compact profile at 0.25 inches thick for easy storage
• Single-piece packaging suitable for individual tool crib issuance

Compatibility

Designed for use with ER11, ER20, ER25, and ER40 collet chucks, pull studs, and retention knobs.

Installation Notes

Collet chuck service is performed by qualified machinists or CNC setup technicians. Before changing tooling, ensure the machine spindle is fully stopped and the control is in an e-stop or tool-change state. Use the spanner wrench only on the designated flats of the chuck nut and avoid applying side-load force that could damage the nut or collet taper. Follow the machine tool manufacturer guidelines for proper collet seating and torque procedure.