Accupro 778966 NMTB40 to 2MT Taper Adapter Through Coolant

Product Description

The ACCUPRO 778966 is an NMTB to Morse Taper adapter designed for use in CNC machining centers and manual milling machines that require a transition between an NMTB40 outside taper and a 2MT inside taper. The adapter features a 1-3/4 inch projection and a 1-1/4 inch nose diameter, allowing toolholders with a Number 2 Morse Taper shank to be run in spindles or tool pockets configured for NMTB40 tooling. Through-coolant capability passes coolant directly through the adapter body to the cutting tool, supporting higher-speed and deeper cutting operations. Machinists and tool crib technicians install this adapter to expand tooling compatibility without retooling the spindle.

This adapter is suited for job shops, production floors, and maintenance machining environments where NMTB40-equipped machines must accept 2MT-shank tooling such as drill chucks, end mill holders, and reamer holders. The through-coolant design makes it appropriate for applications involving deep-hole drilling, boring, or any operation where flood coolant delivered at the tool tip improves chip evacuation and tool life. Installation is performed by qualified machinists or tool room personnel familiar with machine tool spindle interfaces.

Key Features

• NMTB40 outside taper fits standard NMTB40 spindle pockets
• 2MT inside taper accepts Number 2 Morse Taper shank toolholders
• Through-coolant design delivers coolant directly to the cutting zone
• 1-3/4 inch projection provides clearance between spindle face and toolholder nose
• 1-1/4 inch nose diameter for consistent toolholder seating

Compatibility

Designed for use in milling machines and machining centers equipped with NMTB40 spindle interfaces that require acceptance of 2MT-shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or tool room technician. Power down and lock out the machine spindle before installing or removing any toolholder or adapter. Ensure all mating taper surfaces are clean and free of chips, oil film, or burrs before seating the adapter. Verify draw bar engagement and retention force are within the machine manufacturer specifications before returning the spindle to service.