Techniks 11120 ER20 Hex Collet Locknut

Product Description

The TECHNIKS 11120 is an ER20 hex collet locknut designed to secure ER20 series collets in compatible tool holders during machining operations. The hex-style nut allows for proper torque application using a standard spanner or hex wrench, ensuring consistent collet clamping force and accurate tool runout. At 0.1 pounds, it is a lightweight but precision-critical component in any CNC or manual spindle setup. This locknut does not support coolant-through configurations. It is installed by machinists and toolroom technicians as a replacement or spare for standard ER20 tooling assemblies.

The TECHNIKS 11120 is suited for use in residential shop, production, and industrial machining environments wherever ER20 collet chucks are employed. Common applications include CNC machining centers, milling machines, and lathes equipped with ER20-standard toolholders. This part is a direct replacement locknut, making it practical to stock as a spare to minimize downtime when a nut shows wear or damage.

Key Features

• Hex-style design allows precise torque application with a spanner or hex wrench
• Compatible with the ER20 collet series standard
• No coolant-through passages, suitable for dry or external coolant setups
• Lightweight at 0.1 pounds, minimizing added mass in the spindle assembly
• Sold individually, suitable for single-unit replacement needs

Compatibility

Designed as an OEM-style replacement locknut for ER20 series collet chuck toolholders. Fits standard ER20 collet chuck bodies that accept a hex locknut interface.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Always power down and lock out the machine spindle before removing or installing collet locknuts. Use the appropriate ER20 spanner wrench to achieve proper clamping torque; do not use pliers or improvised tools, as these can damage the nut seating surface or affect collet runout. Inspect the mating collet and chuck threads for wear or debris before reinstalling.