Seco 75069965 ER16 Collet Chuck Spanner Wrench

Product Description

The SECO 75069965 is a spanner-style wrench designed for tightening and loosening ER16 collet chucks on CNC machining centers, milling machines, and similar spindle toolholding systems. The wrench engages the flats or pins of the ER16 nut, allowing the operator to seat or release collets securely without damaging the nut face. Weighing 1 pound, it is a straightforward hand tool kept at the machine for routine tool changes. Machinists, toolroom technicians, and CNC setup personnel are the primary users of this wrench.

This wrench is intended for use with ER16 series collet chucks across a range of toolholding applications in production and job-shop environments. The ER16 collet system is common in light to medium milling, drilling, and tapping operations where compact toolholding is required. This spanner wrench is the correct pairing for ER16 nuts and should not be used on other collet series sizes, as nut geometry varies between ER series designations.

Key Features

• Spanner-type design engineered specifically for ER16 collet chuck nuts
• Allows proper seating and release of ER16 collets without nut damage
• Compact and lightweight at 1 pound for convenient bench or toolbox storage
• Single-piece tool with no moving parts for long service life

Compatibility

Designed for use with ER16 series collet chucks and their corresponding collet nuts. Not compatible with other ER series collet systems such as ER11, ER20, ER25, or ER32, which require their own series-specific wrenches.

Installation Notes

This wrench is used by machinists and toolroom personnel during routine collet and toolholder changes. Ensure the machine spindle is fully stopped and the control is in a safe state before performing any toolholding changes. Apply steady, controlled force when tightening the collet nut to achieve proper collet seating without overtorquing. Refer to the machine tool and toolholder manufacturer guidelines for recommended clamping procedures.