Value Collection 210-3068 End Mill Holder NMTB30

Product Description

The VALUE COLLECTION 210-3068 is an end mill holder designed for milling machine spindles using the NMTB30 taper shank interface. It accepts a 3/8 inch bore for end mill shanks and features a 1 inch nose diameter with a 1.75 inch projection from the spindle face. The drawbar thread size is 1/2-13, and the holder carries a TIR (total indicator runout) of 0.0004 inch, providing the concentricity required for accurate milling operations. Through-coolant is not supported. Machinists and tool crib personnel working with NMTB30-equipped vertical mills and knee mills will find this a direct-fit holder for standard 3/8 inch shank end mills.

This end mill holder is suited for use in manual and CNC-converted knee mills, vertical machining centers, and turret mills equipped with an NMTB30 spindle taper. The 1.75 inch projection gives adequate clearance for most standard length end mills while keeping tool overhang minimal to reduce vibration. It is sold individually and is appropriate for production, maintenance, and tool room environments where repeatable tool holding in the NMTB30 format is required.

Key Features

• NMTB30 taper shank interfaces directly with matching spindle receivers
• 3/8 inch bore accommodates standard 3/8 inch shank end mills
• 1.75 inch projection from spindle face suits most standard length end mills
• TIR of 0.0004 inch supports accurate, low-vibration milling cuts
• 1/2-13 drawbar thread for secure retention in the spindle
• 1 inch nose diameter provides a sturdy clamping body

Compatibility

Designed as an OEM-style replacement end mill holder for milling machines equipped with an NMTB30 taper spindle interface accepting a 1/2-13 drawbar thread.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and de-energize the machine spindle before changing tooling, and engage any spindle lock per the machine manufacturer's procedure. Seat the NMTB30 taper fully into the spindle and torque the drawbar to the machine builder's specified value before operation. Inspect the taper shank and spindle bore for chips or damage prior to seating the holder to protect TIR performance.