Accupro 587518 ER40 Collet 0.669 Inch 17mm

Product Description

The ACCUPRO 587518 is an ER40 series collet designed for precision CNC machining and manual milling applications. It accepts shank tooling up to 0.669 inches (17.00 mm) in diameter, with a minimum collet capacity of 0.629 inches (16.00 mm), giving it a 0.040-inch clamping range. The collet holds a total indicator runout (TIR) of 0.01 mm, making it suitable for applications where concentricity and tool positioning accuracy are critical. Machinists and toolroom technicians install this collet into ER40-compatible chucks and toolholders to secure end mills, drills, reamers, and other round-shank cutting tools during metalworking operations.

This collet is used in ER40 collet chucks mounted on CNC machining centers, manual knee mills, and lathe live tooling heads in both job shop and production environments. The ER40 series is a widely adopted industry standard, and this size covers common 17 mm shank tooling. It is appropriate for light to moderate material removal across ferrous and non-ferrous workpieces where runout control directly affects surface finish and tool life.

Key Features

• ER40 collet series — compatible with standard ER40 chuck bodies and toolholders
• 17.00 mm (0.669 inch) nominal collet size with a 0.629 inch (16.00 mm) minimum capacity
• 0.01 mm TIR for high concentricity and reduced tool runout
• Suited for end mills, drills, reamers, and other round-shank cutting tools
• Single-piece packaging for individual replacement or toolholding system builds

Compatibility

Designed as a direct-fit replacement or addition for any ER40-standard collet chuck or toolholder accepting a 17.00 mm collet.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before inserting or removing the collet, ensure the machine spindle is fully stopped and locked out per facility lockout/tagout procedures. Seat the collet into the chuck nut before threading onto the toolholder body — never torque the nut onto the chuck without the collet pre-seated, as this can damage the retaining groove. Inspect the collet bore and chuck taper for chips or debris before each use to maintain the rated TIR.