Accupro 784963 ER25 Er Collet 0.281 Inch

Product Description

The ACCUPRO 784963 is an ER25 series collet designed for use in ER-style collet chucks on CNC machining centers, milling machines, and drill presses. It accepts a 0.281 inch (9/32 inch) shank diameter tool and provides secure clamping force through the standard ER25 taper interface. The collet measures 1.9 inches in height and 1.2 inches in diameter, weighing 0.1 pounds. Machinists and CNC technicians rely on ER collets for quick tool changes and repeatable runout accuracy across a wide range of cutting tools including end mills, drills, and reamers.

This collet is suited for production and job-shop environments running ER25-compatible toolholders. It is appropriate for both light and moderate-duty cutting operations in ferrous and non-ferrous materials. The ER25 series is one of the most widely used collet standards in CNC and manual machining, making this collet a practical replacement or spare for shops maintaining an inventory of common bore sizes. Installation requires a standard ER25 collet nut and compatible chuck body.

Key Features

• ER25 collet series — compatible with all ER25-standard collet chucks and nuts
• 0.281 inch (9/32 inch) bore for direct shank tool clamping
• Compact profile: 1.9 inches height, 1.2 inches width and length
• Lightweight at 0.1 pounds for minimal spindle mass contribution
• Single-piece package quantity suitable for individual replacement or inventory stocking

Compatibility

Designed as an OEM-style replacement collet for use with ER25-standard collet chucks and collet nuts in CNC milling, drilling, and turning applications.

Installation Notes

ER collets are installed by a machinist or CNC technician. Power down and lock out the machine spindle before changing tooling. Seat the collet fully into the collet nut before inserting the tool shank, then thread the nut onto the chuck body and torque with the appropriate ER25 spanners. Inspect the collet bore and taper for chips or wear before each use to maintain runout accuracy.