Accupro 587484 ER20 Collet 0.511 Inch 13.00mm

Product Description

The ACCUPRO 587484 is an ER20 series collet designed for precision CNC machining and milling applications. It accepts tooling up to 0.511 inches (13.00mm) in diameter and holds a minimum collet capacity of 0.472 inches (12.0mm), giving it a usable clamping range suited to a variety of end mills, drills, and reamers. The collet delivers 0.01mm Total Indicator Runout (TIR), making it appropriate for operations where concentricity and tool life are critical. Overall length is 31.0mm. Machinists, CNC operators, and toolroom technicians install this collet into compatible ER20 collet chucks as part of standard spindle tooling setups.

This collet is used in vertical and horizontal machining centers, CNC milling machines, and drilling applications that employ the ER20 collet system. The ER20 standard is widely used in light to medium-duty machining environments across job shops, production facilities, and toolroom settings. The 0.511-inch clamping size is commonly specified for solid carbide and high-speed steel cutting tools in that diameter range. Installation requires no special tooling beyond a standard ER20 collet nut and a calibrated torque wrench.

Key Features

• ER20 collet series for use with standard ER20 collet chucks and collet nuts
• 0.511-inch (13.00mm) collet size with a minimum capacity of 0.472 inches (12.0mm)
• 0.01mm TIR for high concentricity and reduced tool runout
• 31.0mm overall length fits standard ER20 chuck depths
• Single-piece quantity packaging for individual replacement or tooling builds

Compatibility

Designed for use with ER20-series collet chucks accepting a 0.511-inch collet size. Verify chuck series and collet nut thread specification before installation.

Installation Notes

Installation is performed by machinists or CNC toolroom technicians. Ensure the spindle is fully stopped and the machine is in a locked-out, de-energized state before changing collets. Seat the collet fully into the collet nut before threading onto the chuck body, and tighten with a calibrated ER collet wrench to the chuck manufacturer's specified torque. Inspect the collet bore and chuck taper for chips or debris prior to assembly to maintain TIR performance.