Accupro 778974 NMTB50 to 3MT Taper Adapter Through Coolant

Product Description

The ACCUPRO 778974 is an NMTB to Morse Taper adapter designed for use in CNC machining centers and milling machines equipped with NMTB50 spindle tapers. It accepts a 3MT inside taper, allowing technicians to mount Morse taper tooling directly into an NMTB50 spindle without additional adapters. The unit features a 2.38-inch projection and a 1.57-inch hole diameter, with through-coolant capability to support flood or high-pressure coolant delivery directly to the cutting tool. Machinist technicians and tool-room professionals install this adapter to expand tooling compatibility on existing machine spindles.

This adapter is suited for metalworking and machining environments where an NMTB50 spindle must interface with 3MT shank tooling such as drill chucks, end mill holders, or boring bars. It is applicable in both production and job-shop settings running vertical or horizontal milling machines with NMTB50 tapered spindles. The through-coolant feature makes it appropriate for high-speed drilling and deep-hole operations where chip evacuation and tool cooling are critical.

Key Features

• NMTB50 outside taper for direct mounting in NMTB50 spindles
• 3MT inside taper accepts standard Morse taper tooling
• 2.38-inch projection for proper tool clearance
• 1.57-inch hole diameter supports a range of 3MT shank tools
• Through-coolant design routes coolant directly to the cutting zone

Compatibility

Designed as a direct-fit adapter for machining centers and milling machines with NMTB50 spindle tapers requiring 3MT inside taper tooling.

Installation Notes

Installation should be performed by a qualified machinist or tool-room technician. Power down and lock out the machine spindle before inserting or removing any taper adapter. Ensure mating taper surfaces are clean and free of chips, burrs, or coolant residue before seating the adapter. Verify through-coolant ports are aligned and unobstructed before resuming machining operations.