Accupro 776924 ER20 Collet Chuck Wrench Hex

Product Description

The ACCUPRO 776924 is a hex-style collet chuck wrench designed for use with ER20 collet systems. It provides the mechanical leverage needed to properly seat and release ER20 collets in compatible chuck bodies. Collet chuck wrenches are a standard service tool in CNC machining, milling, and precision toolholding applications. This wrench weighs 1 pound and is sold individually. Machinists, toolroom technicians, and CNC operators rely on a correctly sized wrench to achieve consistent clamping force without damaging collet nut threads.

This wrench is intended for bench and machine-side use wherever ER20 collet chucks are in service. The ER20 collet series is widely used in milling machines, machining centers, and CNC routers for workholding and tool retention. The hex drive style engages the collet nut flats directly, making it suitable for environments where quick collet changes and controlled torque application are routine.

Key Features

• Wrench type: Hex, matched to ER20 collet nut geometry
• Collet series: ER20 — correct fit for ER20 chuck bodies and nuts
• Sold as a single unit, no multi-pack required
• Weight: 1 pound for stable, hand-controlled use

Compatibility

Designed for use with ER20 series collet chuck bodies and their corresponding collet nuts.

Installation Notes

Collet chuck wrenches should be used by qualified machinists or toolroom personnel familiar with ER20 toolholding systems. Before changing collets, ensure the machine spindle is fully stopped and any power feed or CNC program is disabled. Use the wrench to engage the collet nut flats squarely to avoid rounding the nut. Do not use extension bars or hammers to increase leverage beyond hand torque.