Micro 100 ER16-125 ER16 Collet 1/8 Inch

Product Description

The MICRO 100 ER16-125 is an ER16 series collet designed to hold cutting tools and workpieces with a 0.125-inch (1/8-inch) shank diameter. It fits standard ER16 collet chucks used on CNC machining centers, manual mills, lathes, and high-speed spindles. The collet delivers a total indicator runout (TIR) of 0.0004 inches, providing the concentricity required for precision milling, drilling, and reaming operations. This collet does not include through-coolant capability. It is installed by machinists and toolroom technicians in production and job-shop environments where consistent tool grip and minimal runout are critical to finished-part accuracy.

The ER16-125 is suited for use in light-duty to medium-duty machining operations where a 1/8-inch tool shank is required. Typical applications include end milling with small-diameter end mills, drilling with jobber-length drill bits, and holding reamers or engraving bits. The ER16 form factor is widely used in compact spindle noses and collet chucks across a broad range of CNC and manual machine tool platforms.

Key Features

• ER16 collet series for use with standard ER16 collet chucks
• Accepts 0.125-inch (1/8-inch) shank diameter tooling
• TIR of 0.0004 inches for high-concentricity tool holding
• No through-coolant passage - suited for dry or flood-coolant setups
• Compact form factor compatible with small spindle nose designs

Compatibility

Designed as an OEM-style replacement or standard tooling collet for use with ER16 collet chucks on CNC machining centers, manual knee mills, and high-speed spindle units accepting the ER16 collet standard.

Installation Notes

Installation and removal should be performed by a qualified machinist or toolroom technician. Always power down and lock out the spindle before seating or removing a collet. Insert the collet into the nut before threading onto the chuck body - never press the collet directly onto the chuck taper without the nut engaged. Verify TIR with a dial test indicator after clamping to confirm acceptable runout before beginning a cut.