Accupro 587664 ER11 Collet 0.177 Inch 4.50mm

Product Description

The ACCUPRO 587664 is an ER11 series collet designed for use in CNC machining centers, milling machines, and high-speed spindle toolholding systems. It accepts a maximum tool shank diameter of 0.177 inches (4.50mm) and provides a minimum collet capacity of 0.157 inches (4.0mm), giving the operator a usable clamping range for close-tolerance work. The collet holds a total indicated runout (TIR) of 0.02mm, supporting accurate, repeatable cuts in precision machining applications. Machinists and toolroom technicians working with small-diameter end mills, drills, and reamers in ER11-compatible spindles are the primary users of this collet.

This collet is suited for light-duty CNC routing, engraving, and high-speed milling operations where a compact ER11 toolholder is specified. The ER11 series is common in benchtop CNC mills, PCB routers, and small vertical machining centers where spindle envelope size limits the use of larger collet systems. It is sold individually and is appropriate for both production shop and toolroom use where consistent grip and low runout are required.

Key Features

• ER11 collet series for compatibility with standard ER11 toolholders and nuts
• Maximum clamping diameter of 0.177 inches (4.50mm)
• Minimum collet capacity of 0.157 inches (4.0mm) for a usable clamping range
• 0.02mm TIR for precise, repeatable tool positioning
• Sold as a single unit, no minimum order beyond one piece

Compatibility

Designed as a direct-fit collet for ER11-series toolholders and spindle nuts. Specific compatible toolholder models were not identified in the available product data.

Installation Notes

Installation is performed by a machinist or toolroom technician. Before inserting or removing the collet, ensure the spindle is fully stopped and the machine is in a safe, locked-out state per shop safety procedures. Seat the collet fully into the ER11 nut before threading the nut onto the spindle nose. Tighten the collet nut with the appropriate ER11 spanner wrench to secure the tool shank; do not use pipe wrenches or improvised tools, as this can damage the collet taper and degrade runout performance.