Accupro 779016 End Mill Holder NMTB30 5/8 Inch Through Coolant

Product Description

The ACCUPRO 779016 is an end mill holder designed for CNC machining centers and vertical milling machines using an NMTB30 taper shank interface. It accepts a 5/8 inch bore and delivers a 1.3 inch projection with a 1-7/16 inch nose diameter. The holder features through-spindle coolant capability, routing coolant directly through the tool for improved chip evacuation and extended cutter life. Total Indicated Runout (TIR) is rated at 0.0002 inch, supporting consistent surface finish and dimensional accuracy. This holder is installed by CNC machinists and toolroom technicians in production and job-shop environments.

The 779016 is suited for milling operations on vertical machining centers equipped with NMTB30 spindle tapers. The 5/8 inch bore accommodates standard end mill shank sizes at that diameter. Through-coolant delivery makes it appropriate for deep-pocket milling, high-feed roughing, and applications where chip control is critical. The drawbar thread size is 1/2-13, which is standard for NMTB30 retention systems. It is packaged as a single unit and sold individually.

Key Features

• NMTB30 taper shank for direct spindle mounting on compatible machining centers
• 5/8 inch bore diameter for standard end mill shanks
• 1.3 inch projection and 1-7/16 inch nose diameter for clearance in typical setups
• Through-spindle coolant compatible, routed directly to the cutting zone
• TIR of 0.0002 inch for high-accuracy toolholding
• 1/2-13 drawbar thread for secure retention

Compatibility

Designed as an OEM-style replacement and standard tooling option for NMTB30 spindle taper machining centers using a 1/2-13 drawbar thread and through-spindle coolant systems.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Always power down and lock out the machining center spindle before seating or removing the holder. Verify drawbar engagement and torque per machine manufacturer specifications before operation. Ensure through-coolant ports are clear and sealed properly before enabling coolant flow to prevent pressure loss or contamination.