Value Collection SC84904747 ER20 Collet Locknut

Product Description

The VALUE COLLECTION SC84904747 is an ER20 collet locknut designed to secure ER20 series collets in place during machining operations. The locknut threads onto the spindle nose or tool holder and applies clamping force to the collet, holding cutting tools at a consistent, repeatable grip. It measures 1.38 inches in diameter and 0.79 inches in height, making it a compact, direct-fit component for standard ER20 tooling systems. Machinists and toolroom technicians install this locknut as part of routine tool changes or when replacing worn clamping hardware on CNC and manual machining equipment.

This locknut is suited for use in machine shops, manufacturing facilities, and job shops running ER20 collet chuck systems. It fits standard ER20 tool holders used on milling machines, machining centers, and similar spindle-driven equipment. The locknut is sold individually and is appropriate for both new tooling builds and replacement of existing hardware showing wear or thread damage.

Key Features

• Compatible with ER20 collet series for secure tool clamping
• Compact profile: 1.38 inches wide by 0.79 inches tall
• Lightweight at 0.242 pounds for easy handling during tool changes
• Direct-replacement locknut for worn or damaged ER20 hardware
• Sold individually with a minimum order quantity of 1

Compatibility

Designed as a direct-fit replacement locknut for ER20 series collet chuck systems used on standard CNC and manual milling equipment.

Installation Notes

Installation is performed by toolroom technicians or machinists during tool changes or spindle maintenance. Power down and lock out the machine before removing or installing any tooling components. Thread the locknut onto the tool holder by hand first to confirm proper thread engagement, then tighten using the appropriate ER20 spanner wrench. Do not use impact tools or improvised wrenches, as over-torquing can damage collet seats and locknut threads.