Accupro 784916 ER20 Er Collet 0.156 Inch

Product Description

The ACCUPRO 784916 is an ER20 series ER collet designed for precision workholding in CNC machining and milling operations. This collet accepts a 0.156 inch (5/32 inch) shank diameter and provides the clamping force and concentricity required for accurate, repeatable toolholding. At 0.05 pounds, it is a compact component measuring 1.9 inches in height and 1.2 inches in diameter. ER collets are a standard interface between spindle and cutting tool, and this unit follows the widely used ER20 collet series specification. Installation and removal are performed by machinists and CNC operators using a standard ER collet wrench and compatible ER20 collet chuck nut.

This collet is suited for use in vertical and horizontal machining centers, CNC mills, lathes with live tooling, and manual milling machines equipped with an ER20 collet chuck. It is appropriate for light to medium cutting operations in production and job shop environments where consistent tool runout and secure clamping are required. The 5/32 inch bore size makes it a direct fit for tooling with that specific shank diameter.

Key Features

• ER20 collet series — widely compatible with standard ER20 collet chucks and nuts
• 0.156 inch (5/32 inch) bore diameter for precise shank engagement
• Compact profile: 1.9 inches height, 1.2 inches diameter
• Lightweight at 0.05 pounds for minimal spindle mass addition
• Single-piece collet construction for consistent clamping performance

Compatibility

Designed for use with ER20 collet chucks and compatible collet chuck nuts. Accepts cutting tools and round-shank tooling with a 0.156 inch (5/32 inch) shank diameter.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Before installing or removing the collet, ensure the machine spindle is fully stopped and locked out per facility lockout/tagout procedures. Use the correct ER20 collet wrench and nut to seat and torque the collet properly — do not use pipe wrenches or improvised tools that can damage the collet taper. Inspect the collet bore and chuck taper for chips or debris before each installation to maintain concentricity.