Techniks 17817 Retention Knob BT30 M12 Thread

Product Description

The TECHNIKS 17817 is a BT30 retention knob designed to secure tool holders in BT30 spindle tapers on CNC machining centers and milling machines. It threads into the drawbar with an M12 thread and pulls the tool holder firmly into the spindle, maintaining accurate tool positioning during cutting operations. The knob features a 45-degree angle radius and measures 11 mm in knob diameter with an overall length of 1.6929 inches. Through-coolant capability is supported, making it compatible with coolant-through spindle configurations. This component is installed by CNC machinists and toolroom technicians as part of routine tool holder changeouts.

The TECHNIKS 17817 is suited for BT30 taper spindle applications in light-duty to mid-range CNC vertical and horizontal machining centers. It is a direct replacement retention knob for shops standardized on the BT30 taper system and is appropriate for use with standard BT30 tool holders requiring an M12 threaded retention knob with through-coolant compatibility.

Key Features

• BT30 taper size for compatibility with BT30 spindle systems
• M12 thread engages drawbar securely for consistent clamping force
• 45-degree angle radius for proper seating and pull-stud geometry
• 11 mm knob diameter for standard BT30 drawbar fit
• Through-coolant capable to support coolant-through spindle setups
• Compact overall length of 1.6929 inches for correct spindle stack-up

Compatibility

Designed as an OEM-style replacement retention knob for BT30 taper tool holders requiring an M12 thread pull stud with a 45-degree angle radius.

Installation Notes

Retention knobs are installed and removed by CNC machinists and toolroom technicians using a retention knob wrench or spanner. Always power down and lock out the spindle before servicing tool holders or changing retention knobs. Torque the retention knob into the tool holder per the tool holder manufacturer's specifications before placing the assembly into the spindle. Inspect the knob threads and seating surface for wear or damage before each installation.