Rego-fix 7112.20010 ER20 Spanner Wrench Er Hex Nuts

Product Description

The REGO-FIX 7112.20010 is a spanner-style collet chuck wrench designed specifically for use with ER20 hex nuts. This wrench provides the mechanical advantage needed to properly tighten and release ER20 collet nuts during toolholder setup and changeover on CNC machining centers, mills, and other rotating spindle equipment. Weighing 0.389 pounds, it is a compact, dedicated tool that helps maintain consistent clamping force on ER20 collets. Machinists and tool crib technicians rely on a proper-fit spanner wrench to avoid damaging nut flats and to achieve repeatable runout performance in production environments.

This wrench is suited for use in machine shops, tool rooms, and production facilities where ER20 collet systems are in regular use. It is the correct tool for assembling and disassembling ER20 collet chucks when hex-style collet nuts are installed. Using a properly matched spanner wrench reduces the risk of nut deformation and ensures the collet seats correctly in the chuck body for accurate, safe cutting operations.

Key Features

• Spanner-style design matched to ER20 hex nut geometry
• Dedicated fit prevents slippage and flat damage during tightening
• Lightweight at 0.389 pounds for easy handling at the machine
• Sold individually - one wrench per package

Compatibility

Designed for use with ER20 hex-style collet nuts. Intended for ER20 collet chuck systems requiring a spanner wrench for nut engagement.

Installation Notes

This wrench is used by machinists and toolroom technicians during collet and toolholder setup. Always ensure the spindle is fully stopped and the machine is in a safe, locked-out state before performing any toolholder change. Use only the correctly sized wrench for the nut being tightened - using an ill-fitting tool can deform the hex flats and compromise clamping accuracy. Follow the toolholder manufacturer torque guidelines when tightening ER collet nuts.