Accupro 587672 ER11 Collet 0.255 Inches 6.50mm

Product Description

The ACCUPRO 587672 is an ER11 series collet designed for precision CNC machining, milling, and drilling applications. It holds tooling at a nominal bore size of 0.255 inches (6.50mm) with a minimum collet capacity of 0.236 inches (6.0mm), giving it a usable clamping range suited to small-diameter end mills, drills, and router bits. Total Indicated Runout (TIR) is rated at 0.02mm, making this collet appropriate for applications where tool concentricity directly affects surface finish and dimensional accuracy. Machinists and CNC operators install this collet into compatible ER11 collet chucks or tool holders as part of standard workholding setup.

This collet is used in benchtop CNC routers, small vertical machining centers, engraving machines, and PCB drilling setups where the compact ER11 system is the standard workholding format. It suits shops and field service technicians working with small-shank tooling in the 6.0mm to 6.5mm range. The single-piece package quantity makes it a practical add-on or direct replacement for a worn or damaged collet in an existing ER11 chuck assembly.

Key Features

• ER11 collet series for use in standard ER11 chucks and tool holders
• Nominal bore size of 0.255 inches (6.50mm) with a clamping range down to 0.236 inches (6.0mm)
• 0.02mm TIR for consistent tool concentricity and repeatable cutting performance
• Compact ER11 form factor suits small CNC routers, engravers, and PCB drilling machines
• Single-piece packaging for individual replacement or inventory replenishment

Compatibility

Designed as a direct-fit replacement collet for any standard ER11 collet chuck or tool holder accepting the ER11 collet series with a 6.50mm bore size.

Installation Notes

ER collets are installed and removed by a machinist or CNC technician using the appropriate ER11 collet nut and spanner wrench. Always ensure the spindle or chuck is fully stopped and the machine is powered down before changing collets. Inspect the collet seating surfaces and collet nut threads for wear or debris before installation, as contamination will degrade TIR performance. Do not exceed the collet's stated clamping range, as oversized or undersized tooling can cause slippage or collet damage.