Rego-fix 7111.20000 ER20 Collet Chuck Spanner Wrench

Product Description

The REGO-FIX 7111.20000 is an ER20 collet chuck spanner wrench designed specifically for use with ER spanner nuts. This tool provides the controlled torque needed to properly seat and release ER20 collets in compatible chuck bodies. Correct collet seating is critical to maintaining runout tolerances and tool-holding accuracy on CNC machining centers, milling machines, and similar spindle equipment. The spanner wrench is a dedicated service tool kept at the machine for tooling changes and is a standard item in any shop running ER collet tooling systems. Weighing 0.377 pounds, it is a lightweight, purpose-built hand tool.

This wrench is suited for use in shops and production environments where ER20-size collet chucks are in regular service. ER20 collet systems are widely used in CNC milling, drilling, and light turning applications. The spanner wrench engages directly with the spanner nut slots on ER20 nuts, allowing machinists and toolroom technicians to tighten and loosen collet assemblies without damaging the nut face or collet seating surfaces. It is appropriate for both initial setup and routine tooling changeovers.

Key Features

• Spanner-type wrench designed specifically for ER20 collet chuck spanner nuts
• Provides positive engagement with ER spanner nut slots to prevent slippage during tightening
• Lightweight at 0.377 pounds for easy handling during frequent tooling changes
• Purpose-built fitment reduces risk of damage to collet and nut seating surfaces
• Sold individually as a single-piece service tool

Compatibility

Designed for use with ER20 spanner nuts on ER20 collet chuck assemblies. Consult your collet chuck documentation to confirm spanner nut slot configuration before use.

Installation Notes

This tool is used by machinists and toolroom technicians during collet and toolholder service. Before changing tooling, ensure the machine spindle is powered down and any automatic tool changer is disabled. Use the spanner wrench in conjunction with a collet chuck holding fixture or torque wrench as recommended by the chuck manufacturer to achieve proper clamping force without over-tightening. Do not use the wrench on spanner nut sizes other than ER20, as mismatched engagement can damage the nut slots.