Accupro 784863 ER16 Collet 0.1249 Inch 9/64

Product Description

The ACCUPRO 784863 is an ER16 collet designed for use in CNC machining centers, milling machines, and high-speed spindles that accept the ER16 collet system. It holds workpiece tooling at a nominal collet size of 0.1249 inches (9/64 inch, or 3.57 mm) with a minimum collet capacity of 0.1046 inches (3.17 mm), allowing a range of tool shank diameters to be secured. The collet delivers a total indicator runout (TIR) of 0.01 mm, supporting precision cutting applications where concentricity is critical. At 27 mm overall length and 17 mm overall diameter, it is sized to the standard ER16 form factor. Machinists, toolroom technicians, and CNC operators install this collet as part of standard toolholding setups.

This collet is suited for light-duty to medium-duty machining operations in production shops, toolrooms, and job shops. It is appropriate for end mills, drills, reamers, and other round-shank cutting tools within its capacity range. The ER16 collet series is widely used in compact spindle assemblies and benchtop CNC equipment where a smaller collet nose diameter is preferred over larger ER series options.

Key Features

• ER16 collet series — fits standard ER16 collet chucks and toolholders
• Nominal collet size of 0.1249 inches (9/64 inch) with a minimum capacity of 0.1046 inches
• 0.01 mm TIR for consistent tool concentricity during cutting operations
• 27 mm overall length fits within standard ER16 chuck depth requirements
• 17 mm overall diameter conforms to ER16 series dimensional standards

Compatibility

Designed as a standard ER16 series collet compatible with any toolholder or collet chuck manufactured to the ER16 collet system specification.

Installation Notes

ER collets are installed by a qualified machinist or toolroom technician. Before changing collets, ensure the spindle is fully powered down and at a complete stop. The collet should be seated into the collet nut before threading the nut onto the chuck body — do not insert the collet into the chuck body first without the nut engaged. Inspect the collet bore and chuck taper for chips or debris before installation, as contamination directly affects runout and tool life.