Accupro 784854 ER11 Collet 0.188 Inch Capacity

Product Description

The ACCUPRO 784854 is an ER11 series collet designed for precision CNC machining and toolholding applications. It accepts tool shanks up to 0.188 inches in diameter, with a minimum collet capacity of 0.172 inches, giving it a clamping range suitable for small-diameter end mills, drills, reamers, and similar cutting tools. The collet is rated at 0.02mm Total Indicator Runout (TIR), making it appropriate for operations where concentricity and repeatability are critical. Machinists and CNC setup technicians working with ER11-compatible spindles and toolholding chucks rely on this collet for consistent, secure tool clamping during high-speed machining operations.

This collet is intended for use in ER11 collet chucks mounted to CNC machining centers, CNC routers, high-speed spindles, and similar precision machine tool setups. It is suited for light-duty machining tasks involving small-diameter tooling in both production and prototype environments. The compact ER11 form factor makes it a common choice in benchtop CNC routers and engraving machines where spindle nose size is limited.

Key Features

• ER11 collet series — fits standard ER11 collet chucks and spindles
• 0.188 inch maximum tool shank capacity
• 0.172 inch minimum collet capacity for a defined clamping range
• 0.02mm TIR rating supports concentricity-sensitive machining operations
• Compact form factor suited for small-spindle CNC equipment

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER11 collet chuck systems. Compatible with any ER11-standard collet chuck accepting the ER11 form factor. No specific machine model compatibility was stated in the product data.

Installation Notes

Installation is performed by a machinist or CNC technician. Ensure the spindle is fully stopped and de-energized before changing collets. Seat the collet fully into the collet nut before inserting it into the chuck body, and torque the nut with an appropriate ER collet wrench — do not use pipe wrenches or improvised tools. Inspect the collet bore and chuck taper for chips or contamination before assembly to maintain TIR performance.