Accupro 587668 ER11 Collet 0.216 Inch 5.50mm

Product Description

The ACCUPRO 587668 is an ER11 series collet designed for precision CNC machining and high-speed spindle applications. With a collet size of 0.216 inches (5.50mm) and a minimum collet capacity of 0.196 inches (5.0mm), it provides a reliable clamping range for small-diameter tooling. The total indicator runout (TIR) is rated at 0.02mm, supporting tight-tolerance work on milling machines, engravers, and Swiss-style turning centers. Machinists and toolroom technicians install this collet as part of a standard ER11 collet chuck system.

This collet is suited for light-duty precision machining operations where accurate tool holding is critical. It fits any ER11-compatible collet chuck and is commonly used in CNC routers, micro-milling spindles, and benchtop machining centers found in both production and job-shop environments. The 5.50mm size accommodates a range of small end mills, drills, and reamers within its capacity range.

Key Features

• ER11 collet series for broad chuck compatibility
• Collet size of 0.216 inches (5.50mm) with minimum capacity of 0.196 inches (5.0mm)
• 0.02mm TIR for precision runout control in tight-tolerance applications
• Sold individually — quantity of one per package
• Lightweight at 1 pound, suitable for compact spindle assemblies

Compatibility

Designed as a direct-fit replacement for any standard ER11 collet chuck system accepting a 5.50mm collet size.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the spindle fully stopped and the machine powered down. Use the appropriate ER11 collet nut and spanner wrench to seat and torque the collet properly within the chuck body. Inspect the collet bore and chuck taper for chips or contamination before installation, as debris will affect runout. Never exceed the rated clamping range of the collet when inserting tooling.