Value Collection 210-5082 End Mill Holder NMTB50 1/2 Inch

Product Description

The VALUE COLLECTION 210-5082 is an end mill holder designed for CNC machining centers and milling machines equipped with an NMTB50 taper spindle. It accepts end mills with a 1/2 inch shank diameter and provides a 2.75 inch projection from the spindle face to the tool cutting edge. The nose diameter measures 1-1/4 inches. With a total indicator runout (TIR) of 0.0004 inches, this holder delivers the concentricity required for accurate milling operations. The drawbar thread size is 1-8. Machinists and CNC operators install this holder when setting up peripheral or face milling operations on NMTB50-equipped machines.

This end mill holder is suited for use in job shops, production machining environments, and tool rooms running NMTB50 taper spindles. The 2.75 inch projection accommodates standard-length end mills while keeping the tool assembly rigid. It is not through-coolant capable, making it appropriate for dry or flood-coolant setups where coolant is delivered externally rather than through the tool. Machine tool technicians and CNC setup personnel are the typical installers for this type of toolholder.

Key Features

• NMTB50 taper shank for direct mounting in compatible milling machine spindles
• 1/2 inch bore diameter accepts standard end mill shanks
• 2.75 inch projection for clearance and tool reach
• TIR of 0.0004 inches for precise concentricity during cutting operations
• 1-1/4 inch nose diameter with 1-8 drawbar thread
• No through-coolant passage — suited for external flood or dry machining

Compatibility

Designed for use with NMTB50 taper spindle milling machines accepting a 1/2 inch shank end mill and a 1-8 drawbar thread.

Installation Notes

Installation is performed by qualified machine tool operators or CNC setup technicians. The spindle must be fully powered down and the machine control placed in an estop or lockout-tagout state before changing toolholders. The drawbar must be properly torqued to the machine manufacturer specifications before running the spindle. Inspect the taper bore and the holder taper for nicks, chips, or contamination before seating to ensure full contact and accurate runout.