Parlec 5002TRK Retention Knob BT50 M24 X 3.00 Thread

Product Description

The PARLEC 5002TRK is a Style B retention knob designed for BT50 taper toolholders used in CNC machining centers. It threads into the drawbar mechanism and secures the toolholder in the spindle during operation. The knob features an M24 x 3.00 thread size, a 0.904 inch knob diameter, and a 90-degree angle radius, delivering a precise and repeatable connection between the toolholder and the machine spindle. With an overall length of 3.34 inches and a pilot diameter of 0.983 inches, this retention knob is built to maintain proper alignment and pull force in demanding production environments. Installation is performed by qualified CNC machine operators or tooling technicians.

This retention knob is suited for use in machining centers that accept BT50 taper toolholders. It is typically found in heavy-duty milling, boring, and drilling applications where large-diameter toolholders require secure spindle retention. The 1.77 inch knob-to-flange length and 0.39 inch flange thickness are dimensioned to meet standard BT50 interface requirements. It is a direct replacement or spare for existing BT50 retention knob installations in industrial CNC environments.

Key Features

• BT50 taper size for compatibility with standard BT50 toolholders
• M24 x 3.00 thread size for secure drawbar engagement
• 90-degree angle radius for proper seating and pull force distribution
• 0.904 inch knob diameter with 0.983 inch pilot diameter for precise spindle alignment
• Style B design with 3.34 inch overall length
• 0.39 inch flange thickness and 1.77 inch knob-to-flange length meet BT50 interface dimensions

Compatibility

Designed as an OEM-style retention knob for BT50 taper toolholders used in CNC machining center spindles requiring an M24 x 3.00 thread drawbar connection.

Installation Notes

Installation and replacement of retention knobs should be performed by a qualified CNC tooling technician or machinist. Always power down and lock out the machining center before servicing the spindle or toolholder assembly. Use the correct torque specification supplied by the machine manufacturer when seating the retention knob into the drawbar. Inspect threads on both the knob and drawbar for wear or damage before installation.