Accupro ER20HP 03.97 ER20 Collet 5/32 Inch

Product Description

The ACCUPRO ER20HP 03.97 is an ER20 series precision collet designed to hold 5/32-inch shank tooling in CNC machining centers, milling machines, and other spindle-driven equipment. With a total indicator runout (TIR) of 0.0002 inches (0.0050 mm), this collet delivers the concentricity required for accurate cutting, drilling, and reaming operations. The overall length is 31.5 mm. Machinists, toolroom technicians, and CNC operators use ER20 collets as standard workholding components when precise tool alignment and repeatability are critical to part quality.

This collet is suited for light-duty to medium-duty machining applications in both production shops and job shops. The ER20 collet system is widely used in high-speed spindles and collet chuck holders where compact workholding is needed. It accepts 5/32-inch round shank cutting tools including end mills, drills, and reamers. Typical installations are found in CNC vertical machining centers, manual knee mills with ER collet chucks, and router spindles requiring close-tolerance tool holding.

Key Features

• ER20 collet series for compatibility with standard ER20 collet chuck holders
• 5/32-inch bore accepts standard round shank tooling
• TIR of 0.0002 inches (0.0050 mm) for high-precision concentricity
• Overall length of 31.5 mm suits compact spindle assemblies
• Single-piece package quantity for individual replacement or fleet expansion

Compatibility

Designed as an OEM-style replacement collet for use in standard ER20 collet chuck holders requiring a 5/32-inch bore size.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Clean the collet chuck bore and collet seating surfaces before installation to remove chips, oil, and debris that can affect runout. Insert the collet into the chuck nut before threading onto the chuck body, following the tool holder manufacturer's torque procedure. Never run a collet outside its rated clamping range, as this reduces grip force and increases runout.