Accupro ER25HP 11.11 ER25 Collet 7/16 Inch

Product Description

The ACCUPRO ER25HP 11.11 is an ER25 series collet designed for use in ER25 collet chucks on CNC machining centers, manual mills, and other rotating spindle equipment. It accepts a 7/16 inch shank diameter and delivers a total indicator runout (TIR) of 0.0002 inch (0.0050 mm), supporting accurate tool holding for drilling, reaming, and end milling operations. Machinists and CNC operators rely on this collet to maintain consistent concentricity across production runs. The collet is sold individually.

This ER25 collet fits standard ER25 collet chucks used in light to medium-duty machining applications. Typical installations include CNC vertical machining centers, horizontal machining centers, manual knee mills, and Swiss-style turning centers equipped with ER25 tooling systems. It is suited for holding round-shank cutting tools at 7/16 inch diameter in both ferrous and non-ferrous material removal operations.

Key Features

• ER25 collet series — fits any standard ER25 collet chuck
• 7/16 inch tool holding diameter
• TIR of 0.0002 inch (0.0050 mm) for precise concentricity
• Sold as a single unit (package quantity of 1)

Compatibility

Designed for use with standard ER25 collet chucks across CNC and manual spindle tooling systems that accept the ER25 collet series.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the spindle is powered down and the machine is in a safe lockout state before changing collets. Clean the collet chuck bore and collet taper surfaces before seating the collet to avoid runout caused by chips or debris. Torque the collet nut using a proper ER spanner wrench to the chuck manufacturer's specification — do not use improvised tools that can damage the nut or collet seating surfaces.