Value Collection 210-4074 End Mill Holder NMTB40

Product Description

The VALUE COLLECTION 210-4074 is an end mill holder designed for CNC milling machines and machining centers equipped with an NMTB40 taper spindle. It accepts end mills with a 5/8-inch shank diameter and delivers a projection of 2.31 inches from the nose face, providing adequate clearance for most standard milling operations. The nose diameter measures 1-1/2 inches. With a TIR of 0.0004 inches, this holder maintains tight concentricity tolerances critical for accurate material removal. The drawbar thread is 5/8-11, compatible with standard NMTB40 drawbar hardware. Installation and tool changes are handled by machinists and CNC setup technicians in machine shop environments.

This end mill holder is suited for use in vertical and horizontal machining centers running NMTB40 tooling. It is appropriate for general-purpose milling applications in job shops, production environments, and toolrooms where consistent runout control and secure end mill retention are required. The holder does not feature through-coolant capability, making it best suited for dry cutting or flood coolant setups where coolant is delivered externally.

Key Features

• NMTB40 taper shank for direct spindle mounting on compatible machining centers
• 5/8-inch bore accepts standard end mill shank diameters
• 2.31-inch projection provides clearance for common milling depths
• TIR of 0.0004 inches supports tight concentricity for precision cuts
• 5/8-11 drawbar thread matches standard NMTB40 retention hardware
• No through-coolant port — suited for external coolant delivery setups

Compatibility

Designed as a standard replacement and production-use end mill holder for machining centers with NMTB40 taper spindles accepting 5/8-inch shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician with the machine powered down and the spindle fully de-energized before tooling changes. Secure the holder using the machine drawbar torqued according to the machine tool manufacturer specifications. Inspect the taper shank and spindle bore for chips or contamination before seating the holder, as debris will compromise runout. Always verify TIR with a dial indicator after installation before beginning a cut.