Techniks 17801 Retention Knob BT30 M12 Thread 11mm

Product Description

The TECHNIKS 17801 is a BT30 retention knob designed to secure toolholders in BT30 spindle tapers on CNC machining centers and milling machines. The knob threads into the drawbar with an M12 thread and features a 45-degree angle radius that ensures consistent clamping force and proper seating during tool changes. With an 11 mm knob diameter and an overall length of 1.6929 inches, it is sized to fit standard BT30 toolholder pull studs. This part is installed by CNC machinists and toolroom technicians as part of routine toolholder setup or replacement.

The TECHNIKS 17801 is suited for use in BT30 spindle applications on vertical and horizontal machining centers where reliable tool retention is required. It is a direct-fit pull stud for BT30 toolholders and is appropriate for shops running standard toolholder assemblies in production or job-shop environments. No through-coolant passage is present, making it compatible with dry or flood-coolant setups where coolant delivery is not routed through the spindle drawbar.

Key Features

• BT30 taper size for use with BT30 spindle toolholders
• M12 thread size for drawbar engagement
• 45-degree angle radius for consistent clamping and seating
• 11 mm knob diameter for standard BT30 pull stud fitment
• 1.6929 inch overall length
• No through-coolant passage

Compatibility

Designed as an OEM-style replacement retention knob for BT30 taper toolholders using an M12 thread drawbar connection.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Before installing or replacing a retention knob, the machine spindle must be fully powered down and the drawbar disengaged. The knob should be threaded in by hand first and then torqued using the appropriate pull-stud wrench to the toolholder manufacturer's specification. Inspect the knob and toolholder threads for wear or damage before each assembly.