Accupro 587354 ER25 Collet 0.551 Inch 14mm

Product Description

The ACCUPRO 587354 is an ER25 series collet designed for precision CNC machining applications. It accepts workpieces and cutting tools up to 0.551 inches (14.00 mm) in diameter, with a minimum collet capacity of 0.511 inches (13.0 mm), giving it a usable clamping range suited to standard end mills, drills, and reamers in that size bracket. The collet holds a total indicated runout (TIR) of 0.01 mm, making it appropriate for finishing passes and operations where tool concentricity directly affects surface finish and dimensional accuracy. Machinists and CNC operators install this collet into compatible ER25 collet chucks mounted on machining centers, lathes, or routers.

This collet is used in production and job-shop environments where ER25 toolholding is the specified standard. The ER25 system is widely adopted across vertical and horizontal machining centers, CNC routers, and manual mills equipped with ER25 chucks. It is suited for light to medium-duty cutting operations in steel, aluminum, plastics, and composites. The 0.551-inch bore size addresses tooling at the upper range of the ER25 collet series, and the 0.01 mm TIR rating supports repeatable, accurate results across production runs.

Key Features

• ER25 collet series with 0.551 inch (14.00 mm) nominal bore diameter
• Minimum collet capacity of 0.511 inches (13.0 mm) for a usable clamping range
• 0.01 mm TIR rating for precision tool concentricity
• Compatible with standard ER25 collet chuck systems
• Single-piece packaging, minimum order quantity of 1

Compatibility

Designed as a direct-fit replacement or addition for any ER25-standard collet chuck system. Specific machine or chuck model compatibility was not provided in the product data; verify that the receiving chuck is rated for the ER25 collet series before installation.

Installation Notes

Installation is performed by machinists or CNC setup technicians. Before installing or removing a collet, power down the spindle and confirm it has come to a complete stop. Use the appropriate ER25 collet nut and a calibrated torque wrench rated for collet nut applications; do not over-tighten by hand or with impact tools. Inspect the collet bore and chuck taper for chips or debris before seating the collet, as contamination directly affects runout and clamping force.