Value Collection 210-3071 End Mill Holder NMTB30

Product Description

The VALUE COLLECTION 210-3071 is an end mill holder designed for CNC machining centers and manual milling machines using an NMTB30 taper shank interface. It accepts a 3/4-inch bore for end mill shanks and provides a 2.756-inch projection from the spindle nose face. The 1-3/4-inch nose diameter supports stable clamping under cutting loads. Total Indicated Runout (TIR) is held to 0.0004 inch, supporting accurate, repeatable cuts. This holder is installed and serviced by machinists and CNC setup technicians in job shops, production machining, and toolroom environments.

This end mill holder is suited for light to medium milling operations on vertical machining centers and knee mills equipped with an NMTB30 spindle taper. The 2.756-inch projection makes it appropriate for applications requiring clearance from the spindle nose to the workpiece. The drawbar thread is 1/2-13 UNC, which is the standard thread for NMTB30 tooling. No through-coolant capability is present, so flood or mist coolant delivery must be handled externally.

Key Features

• NMTB30 taper shank for direct spindle mounting on compatible machines
• 3/4-inch bore accommodates standard end mill shank diameter
• 2.756-inch projection provides clearance from spindle nose to cutting tool
• TIR of 0.0004 inch supports accurate, repeatable milling operations
• 1/2-13 UNC drawbar thread matches NMTB30 spindle standard
• No through-coolant, keeping the design straightforward and cost-effective for general use

Compatibility

Designed as an OEM-style replacement or direct tooling option for milling machines and machining centers equipped with an NMTB30 spindle taper and a 1/2-13 UNC drawbar thread.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Before mounting or removing this holder, the machine spindle must be fully stopped and the control placed in an appropriate safe state per the machine tool manufacturer's procedures. The drawbar must be torqued using the machine's drawbar wrench or retention knob system to the specification provided by the machine manufacturer. Inspect the taper bore and holder shank for nicks, chips, or contamination before seating to avoid damage to the spindle or elevated runout.