Value Collection 210-4066 End Mill Holder NMTB40

Product Description

The VALUE COLLECTION 210-4066 is an end mill holder designed for CNC machining centers and milling machines that use the NMTB40 taper shank interface. It accepts end mills and cutting tools with a 1-1/4 inch bore diameter and delivers a projection of 3.75 inches from the spindle face to the tool tip. The nose diameter measures 2-1/2 inches. With a total runout (TIR) of 0.0004 inch, this holder maintains the concentricity required for accurate milling operations. Weighing 3.44 pounds, it is suited for general-purpose production environments. Installation and tool changes are handled by machinists and CNC setup technicians.

This end mill holder is used in vertical and horizontal machining centers equipped with NMTB40 spindle tapers. The 3.75-inch projection provides clearance for workpiece fixturing in typical milling setups. The 5/8-11 drawbar thread size is standard for NMTB40 tooling systems. Through-coolant is not supported by this holder. It is appropriate for shops running production milling, tool-and-die work, and general metalworking applications where consistent tool holding and repeatable runout are required.

Key Features

• NMTB40 taper shank for direct spindle mounting on compatible machining centers
• 1-1/4 inch bore diameter accommodates standard end mill shank sizes
• 3.75 inch projection for clearance in typical fixturing setups
• TIR of 0.0004 inch for consistent concentricity and surface finish accuracy
• 5/8-11 drawbar thread — standard for NMTB40 tooling
• 2-1/2 inch nose diameter for rigid clamping support

Compatibility

Designed for use with machining centers equipped with NMTB40 taper spindles and a 5/8-11 drawbar thread. Through-coolant configurations are not compatible with this holder.

Installation Notes

Installation is performed by a machinist or CNC setup technician. Power down and lock out the machining center before mounting or removing the holder from the spindle. Ensure the taper bore and shank are clean and free of chips or burrs before seating to avoid false seating and elevated runout. Torque the drawbar according to the machine tool manufacturer specifications for NMTB40 tooling.