Accupro 588342 ER25 Collet 8 Mm

Product Description

The ACCUPRO 588342 is an ER25 series collet sized at 8 mm, designed to secure cutting tools and workholding tooling in ER25-compatible collet chucks. Collets of this type create a precision clamping force around the tool shank when the chuck nut is tightened, ensuring concentricity and minimizing runout during milling, drilling, and tapping operations. With a clamping pressure rating of 1000 and a package weight of 0.7 pounds, this collet is suited for production and maintenance machining environments. Machinists, tool-and-die tradespeople, and CNC operators are the primary installers.

This collet fits standard ER25 collet chucks used in vertical machining centers, CNC mills, drill presses, and manual milling machines where an ER25 nose configuration is specified. The 8 mm bore accommodates tool shanks turned to that diameter. It is appropriate for both production shop and maintenance machining applications requiring repeatable tool clamping in an ER25 system.

Key Features

• ER25 collet series — fits all ER25-compatible collet chucks
• 8 mm collet bore for standard 8 mm shank tooling
• Clamping pressure rating of 1000 for secure tool retention
• Sold individually — one collet per package
• Lightweight at 0.7 pounds for easy handling and tool changes

Compatibility

Designed as a direct-fit replacement or spare for ER25-series collet chucks requiring an 8 mm bore collet. Compatible with any machine tool or chuck body built to the ER25 collet standard.

Installation Notes

Installation is performed by machinists or CNC operators. Before inserting or removing a collet, confirm the spindle is fully stopped and the machine is in a safe, locked-out state per applicable lockout/tagout procedures. Seat the collet into the chuck nut before threading the assembly onto the chuck body — do not tighten the nut onto the chuck without the collet seated first. Inspect the collet bore and chuck taper for chips or debris before each installation to maintain concentricity.