Accupro 784912 ER20 Collet 0.469 Inch

Product Description

The ACCUPRO 784912 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other spindle toolholding applications. It accepts a decimal inch size of 0.469 inches with a minimum collet capacity of 0.438 inches, giving the operator a defined clamping range suitable for standard end mills, drills, and other round-shank tooling. At 0.05 pounds, the collet is lightweight and precision-ground to the ER20 standard. Machinists and tool room technicians install this collet into a compatible ER20 collet chuck or toolholder to secure cutting tools during operation.

This collet is intended for use in production machining, tool and die, and general metalworking environments where ER20 toolholding systems are in service. It fits horizontal and vertical machining centers, drill-tap machines, and manual mills equipped with ER20 collet chucks. The 0.469-inch nominal size accommodates common round-shank tooling in that diameter range. It is sold individually and is a direct replacement when a worn or damaged ER20 collet of this size needs to be swapped out.

Key Features

• ER20 collet series for compatibility with standard ER20 collet chucks and toolholders
• 0.469-inch decimal inch collet size with a minimum clamping capacity of 0.438 inches
• Lightweight at 0.05 pounds for minimal spindle imbalance contribution
• Compact profile: 1.9 inches in height, 1.2 inches in width, 1.2 inches in length
• Sold as a single unit for targeted replacement without over-ordering

Compatibility

Designed as an OEM-style replacement collet for use in any toolholding system built to the ER20 collet standard.

Installation Notes

ER20 collets are installed and removed by a qualified machinist or toolroom technician using the appropriate ER20 collet nut and spanner wrench. Always power down and lock out the machine spindle before changing collets. Inspect the collet bore, outer taper, and chuck taper seat for chips or damage before assembly, as contamination will affect runout and tool retention. Do not exceed the clamping range of the collet when selecting tooling shank diameters.