Accupro 588478 ER20 Collet 6 Mm

Product Description

The ACCUPRO 588478 is an ER20 series collet sized at 6 mm, designed to hold round-shank cutting tools in ER20-compatible collet chucks. Collets in this series function by compressing radially when drawn into a matching chuck nut, providing concentric clamping force on the tool shank. The ER20 standard is widely used in CNC machining centers, manual milling machines, and drill presses where consistent runout control and repeatable tool holding are required. Machinists and tool room technicians select ER collets for general-purpose milling, drilling, reaming, and tapping operations. This collet weighs 0.5 pounds and ships as a single unit.

This collet is suited for light to medium machining operations in job shops, production facilities, and tool rooms. The 6 mm bore accepts round-shank end mills, drills, reamers, and taps of the corresponding diameter. ER20 collets are commonly found on CNC router spindles and benchtop milling setups where a compact collet system is preferred over larger ER series standards.

Key Features

• ER20 collet series — fits all standard ER20 collet chucks and nuts
• 6 mm bore diameter for precise shank clamping
• Radial compression design provides uniform clamping force around the tool shank
• Single-piece construction supports consistent runout performance
• Compact ER20 form factor suits benchtop and CNC router spindle applications

Compatibility

Designed as a direct-fit replacement or spare for any standard ER20 collet chuck system accepting 6 mm collets.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with collet chuck systems. Before inserting or removing the collet, confirm the spindle is fully stopped and locked out per facility lockout/tagout procedures. Seat the collet into the collet nut before threading the nut onto the chuck body — never thread the nut onto the chuck without the collet seated. Tighten the collet nut with the appropriate ER20 spanner wrench to the chuck manufacturer specifications.