Value Collection SC84904762 ER25 Collet Locknut

Product Description

The VALUE COLLECTION SC84904762 is an ER25 collet locknut used to secure ER25 series collets in compatible tool holders and CNC spindles. The locknut threads onto the tool holder nose and clamps the collet under axial load, maintaining accurate tool runout during milling, drilling, and turning operations. Measuring 1.69 inches in diameter and 0.87 inches in height, it is a compact, precision-threaded component. Machinists and CNC setup technicians install this part as a routine replacement when existing locknuts show thread wear, deformation, or inability to maintain consistent clamping torque.

This locknut is suited for shop floor and production environments running ER25 collet systems. Common applications include vertical machining centers, CNC lathes, drill presses, and manual milling machines equipped with ER25-compatible spindles or tool holders. It is appropriate for both high-volume production setups and general maintenance replacement in job shops where ER25 tooling is standard.

Key Features

• Designed for ER25 collet series tool holders
• 1.69 inch outer diameter fits standard ER25 spanner wrench flats
• 0.87 inch height provides a low-profile clamping interface
• Sold individually, suitable for single-unit replacement or inventory restocking

Compatibility

Designed as a direct-replacement locknut for ER25 collet series tool holders used in standard CNC and manual machining applications.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Before replacing the locknut, power down the spindle and confirm the machine is in a safe, locked-out state per applicable OSHA lockout/tagout procedures. Thread the locknut onto the tool holder nose by hand before applying a spanner wrench to reach proper seating. Do not use impact tools or exceed the tool holder manufacturer's recommended clamping torque, as over-tightening can damage collet seats and threads.