Accupro 587480 ER20 Collet 0.354 Inch 9mm

Product Description

The ACCUPRO 587480 is an ER20 series collet designed for precision CNC machining, milling, and drilling applications. It accepts tool shanks up to 0.354 inches (9.00 mm) in diameter, with a minimum collet capacity of 0.314 inches (8.0 mm). The collet holds a total indicator runout (TIR) of 0.01 mm, making it suitable for close-tolerance work where concentricity matters. Machinists and toolroom technicians install this collet into compatible ER20 collet chucks and tool holders as part of standard workholding setups on CNC mills, lathes, and routers.

This collet is used in production and job-shop environments where ER20 toolholding systems are already in place. It fits residential shop setups as well as commercial machine tool applications. The ER20 series is one of the most widely adopted collet standards in CNC and manual machining, and this size covers a common range of end mill and drill shank diameters used in everyday cutting operations.

Key Features

• ER20 series collet accepting shanks from 0.314 inches (8.0 mm) to 0.354 inches (9.00 mm)
• 0.01 mm TIR for consistent concentricity in close-tolerance machining
• Compatible with standard ER20 collet chucks and tool holders
• Compact collet form factor suited for both CNC and manual machine tool use
• Ships in single-unit packaging with a minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement and standard-fit collet for ER20 collet chuck systems. No specific chuck or machine model compatibility was stated in the product data.

Installation Notes

Installation is performed by machinists or toolroom technicians. Before inserting or removing a collet, ensure the machine spindle is fully stopped and locked out per applicable safety procedures. Seat the collet fully into the collet nut before threading onto the chuck body, and tighten the nut with the appropriate ER collet wrench to manufacturer specifications for the chuck being used. Do not use an impact driver or oversized wrench on collet nuts.