Accupro 88.600.30.AP Retention Knob BT30 M12x1.75

Product Description

The ACCUPRO 88.600.30.AP is a BT30 taper retention knob designed for securing toolholders in BT30 spindles on CNC machining centers and milling machines. With a 45-degree angle radius, M12x1.75 thread, and a 1.693-inch overall length, this knob delivers a secure drawbar connection between the spindle and toolholder. The high-torque design and through-coolant capability make it suitable for demanding cutting applications where coolant delivery through the spindle is required. Machining professionals and CNC maintenance technicians install this component during toolholder setup or replacement.

This retention knob fits BT30 toolholders used in vertical and horizontal CNC machining centers equipped with BT30 spindle interfaces. The Style C configuration, 0.4331-inch knob diameter, and 0.4921-inch pilot diameter are sized to match BT30 toolholder specifications. Through-coolant capability is supported via a 0.0394-inch coolant hole diameter, making this knob compatible with spindle systems that supply coolant through the drawbar. Typical applications include production machining environments where consistent toolholder retention and coolant-through performance are priorities.

Key Features

• BT30 taper size for direct fitment in BT30 spindle toolholders
• M12x1.75 thread for positive drawbar engagement
• 45-degree angle radius for reliable seating under high-torque conditions
• Through-coolant design with 0.0394-inch coolant hole diameter
• High-torque rated construction for demanding cutting applications
• Style C configuration with 0.4921-inch pilot diameter for precise toolholder alignment

Compatibility

Designed as an OEM-style replacement retention knob for BT30 taper toolholders with M12x1.75 drawbar thread.

Installation Notes

Installation is performed by qualified CNC machine operators or maintenance technicians. Always power down and lock out the machine spindle before removing or installing retention knobs. Use the appropriate spanner or retention knob wrench sized for the knob diameter to avoid damaging the toolholder or knob. Verify thread engagement and seating before returning the spindle to service.