Accupro 778970 NMTB40 to 4MT Morse Taper Adapter

Product Description

The ACCUPRO 778970 is an NMTB to Morse Taper adapter designed for use in CNC machining centers and milling machines that require a transition between NMTB40 tooling and 4MT shanked tooling. The outside taper is NMTB40, and the inside taper accepts a 4MT connection. The adapter features a 3-inch projection and a 1.97-inch hole diameter. Through-coolant capability allows coolant delivery directly through the tool path, supporting better chip evacuation and tool life in production environments. This adapter is installed by machinists and tool setup technicians working with vertical or horizontal machining centers.

This adapter is used in machine shop environments where existing NMTB40 spindle tooling must accept 4MT shank tools without replacing the spindle or toolholder. Common applications include drill, reamer, and boring tool setups where through-coolant delivery is required. The 3-inch projection length accommodates clearance needs in typical production setups. Suitable for both job shop and production floor use where mixed taper tooling systems are in service.

Key Features

• NMTB40 outside taper for direct spindle mounting in NMTB40-compatible machines
• 4MT inside taper accepts standard Morse Taper 4 shank tooling
• 3-inch projection length for clearance in production setups
• 1.97-inch hole diameter accommodates through-coolant delivery
• Through-coolant design supports chip evacuation and extended tool life

Compatibility

Designed for use with NMTB40 spindle tooling systems requiring a 4MT inside taper connection. Compatible with machines equipped with NMTB40 spindle interfaces accepting Morse Taper 4 shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or tool setup technician familiar with taper tooling systems. Ensure the machine spindle is fully powered down and all motion is stopped before installing or removing the adapter. Taper surfaces should be clean and free of chips, oil, or debris before seating to ensure proper fit and runout. Verify through-coolant port alignment with the machine spindle coolant delivery system before operation.