Accupro 775314 End Mill Holder NMTB50 5/8 Inch Through Coolant

Product Description

The ACCUPRO 775314 is an end mill holder designed for CNC machining centers and milling machines that use the NMTB50 taper shank interface. It accepts a 5/8 inch bore and provides 2.34 inches of projection from the spindle face, giving the tool sufficient clearance for a wide range of milling operations. The holder features through-coolant capability, allowing coolant to flow directly through the spindle and holder body to the cutting tool. Total indicator runout (TIR) is rated at 0.0002 inches, supporting accurate, repeatable cuts. The 1-11/16 inch nose diameter and 1-8 drawbar thread size are consistent with standard NMTB50 tooling conventions. Installation and use are typical for machining centers in production and job-shop environments.

This end mill holder is suited for vertical and horizontal machining centers equipped with NMTB50 spindles. The through-coolant design makes it well matched for deep-pocket milling, high-speed finishing passes, and applications where chip evacuation and tool cooling are critical. It is installed and used by CNC machinists and tool-room technicians in job shops, production facilities, and maintenance machining environments. The 1-piece package quantity and minimum order quantity of 1 make it practical for single-tool procurement.

Key Features

• NMTB50 taper shank for direct spindle mounting on compatible machining centers
• 5/8 inch bore accepts standard end mill shanks of that diameter
• Through-coolant design with through-spindle coolant type for direct coolant delivery to the cutting edge
• TIR of 0.0002 inches for precise, low-runout tool holding
• 2.34 inch projection provides clearance for workpiece features and fixturing
• 1-8 drawbar thread size for secure spindle retention

Compatibility

Designed as an OEM-style replacement and standard tooling option for machining centers equipped with NMTB50 taper spindles and through-spindle coolant systems.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Ensure the machine spindle is fully powered down and the drawbar is released before inserting or removing the holder. Verify the taper shank and spindle bore are clean and free of chips or debris before seating the holder. Confirm drawbar engagement to the 1-8 thread before initiating any spindle rotation.