Value Collection 210-4056 End Mill Holder NMTB40

Product Description

The VALUE COLLECTION 210-4056 is an end mill holder designed for milling machines equipped with an NMTB40 taper spindle. It accepts end mills with a 7/8 inch bore and provides 2.81 inches of projection from the spindle face, giving the tool a 1-7/8 inch nose diameter. The holder achieves a Total Indicator Runout (TIR) of 0.0004 inch, supporting precise, repeatable cutting performance. A 5/8-11 drawbar thread secures the holder in the spindle. This type of toolholder is a standard component in machining setups and is installed and serviced by machinists and CNC machine operators.

This end mill holder is suited for vertical milling machines, knee mills, and machining centers fitted with NMTB40 taper spindles. It is used in production and job-shop environments where accurate end mill positioning is required. The 2.81 inch projection accommodates workpiece clearance needs common in standard face milling and contouring operations. Through-coolant is not supported by this holder.

Key Features

• NMTB40 taper shank for direct spindle mount on compatible machines
• 7/8 inch bore accepts standard end mill shanks of that size
• 2.81 inch projection from spindle face for workpiece clearance
• 1-7/8 inch nose diameter for rigid tool support
• 0.0004 inch TIR for accurate, low-runout tool holding
• 5/8-11 drawbar thread for secure spindle retention

Compatibility

Designed for use with milling machines equipped with an NMTB40 taper spindle and a 5/8-11 drawbar thread. Accepts end mills with a 7/8 inch straight shank.

Installation Notes

Installation is performed by a machinist or CNC operator. Power down and lock out the machine before mounting or removing any toolholder. Ensure the spindle bore and taper shank are clean and free of chips or burrs before seating the holder. Torque the drawbar according to the machine manufacturer specifications and verify tool runout with a dial indicator before beginning a cut.