Accupro 785045 ER40 Collet 0.25 Inch

Product Description

The ACCUPRO 785045 is an ER40 series collet designed for use in CNC machining centers, milling machines, lathes, and other spindle-driven equipment that accept the ER40 collet standard. It holds a 0.25 inch (1/4 inch) nominal shank diameter with a minimum collet capacity of 0.234 inches, giving operators a reliable clamping range for standard tooling. The collet measures 1.75 inches in width and length and 2 inches in height, with a total weight of 0.6 pounds. Machinists and CNC operators install this collet when setting up tool holders for end mills, drills, reamers, and similar round-shank cutting tools requiring consistent runout and grip force.

This collet is suited for production and job-shop environments where ER40 collet chucks are standard tooling. It fits any tool holder or collet chuck manufactured to the ER40 specification, making it a common choice across vertical machining centers, horizontal mills, and multi-axis lathes. The 1/4 inch capacity covers a wide range of small-diameter cutting tools used in ferrous and non-ferrous material work. It is sold individually and is appropriate for shops stocking collets by size to support flexible tooling setups.

Key Features

• ER40 collet series for use with standard ER40-compatible tool holders and chucks
• 0.25 inch (1/4 inch) nominal collet size with a minimum capacity of 0.234 inches
• Compact form factor: 1.75 inches wide by 1.75 inches long by 2 inches tall
• Lightweight at 0.6 pounds for easy handling during tool changes
• Sold as a single unit for individual size stocking

Compatibility

Designed for use with any ER40-specification collet chuck or tool holder accepting the ER40 collet standard. Verify chuck bore and collet series match before installation.

Installation Notes

Installation is performed by machinists or CNC tooling technicians. Power down and lock out the machine spindle before inserting or removing collets. Use the appropriate ER40 collet nut and torque wrench rated for collet assemblies — consult the tool holder manufacturer's guidelines for proper seating procedure. Inspect the collet bore and mating surfaces for debris or damage before each use to maintain runout accuracy.