Value Collection 210-4073 End Mill Holder NMTB40

Product Description

The VALUE COLLECTION 210-4073 is an end mill holder designed for milling machines and machining centers that use the NMTB40 taper shank interface. It accepts end mills with a 1/2 inch bore and provides a 2 inch projection from the spindle face, giving the cutter the clearance needed for most standard milling applications. The nose diameter measures 1-1/4 inches. A 5/8-11 drawbar thread secures the holder in the spindle. Total indicator runout (TIR) is rated at 0.0004 inch, supporting accurate, repeatable cutter positioning. Installed by machinists and toolroom technicians in production and job-shop environments.

This holder is suited for vertical and horizontal milling machines equipped with an NMTB40 spindle taper. The 2 inch projection accommodates standard end mill lengths without excessive overhang. The 1/2 inch bore fits a wide range of two-flute and four-flute end mills commonly used in steel, aluminum, and general-purpose machining. Through-coolant is not supported on this holder, so coolant must be directed externally at the cutting zone. This is a single-piece holder sold individually.

Key Features

• NMTB40 taper shank fits standard 40-taper milling machine spindles
• 1/2 inch bore accommodates common end mill shank sizes
• 2 inch projection provides clearance for standard milling cuts
• TIR of 0.0004 inch supports precise, repeatable cutter runout
• 5/8-11 drawbar thread for secure spindle retention
• No through-coolant — external coolant application required

Compatibility

Designed for milling machines and machining centers with an NMTB40 taper spindle accepting a 5/8-11 drawbar thread and end mills with a 1/2 inch shank diameter.

Installation Notes

End mill holders are installed and removed by qualified machinists. Power down and lock out the machine spindle before changing tooling. Ensure the taper surfaces of both the holder and the spindle are clean and free of chips or oil film before seating. Torque the drawbar according to the machine manufacturer's specifications — do not use the holder shank or nose to apply leverage.