Value Collection 210-3070 End Mill Holder NMTB30

Product Description

The VALUE COLLECTION 210-3070 is an end mill holder designed for CNC machining centers and manual milling machines that accept an NMTB30 taper shank interface. It accepts a 5/8-inch bore and delivers a 2.756-inch projection from the spindle face, keeping the cutting tool at a consistent, repeatable distance from the workpiece. The nose diameter measures 1-1/2 inches. With a total indicator runout (TIR) of 0.0004 inch, this holder maintains tight concentricity for accurate material removal. Machinists and tool room technicians install this holder when setting up end mills in NMTB30-compatible spindles.

This holder is suited for vertical and horizontal milling operations in job shops, production environments, and tool rooms. It is a standard choice for setups requiring a secure, rigid connection between an NMTB30 spindle and a 5/8-inch shank end mill. The drawbar thread size is 1/2-13, which is the standard thread used to retain NMTB taper tooling in the spindle. Through-coolant is not supported by this holder.

Key Features

• NMTB30 taper shank for direct mounting in compatible milling spindles
• 5/8-inch bore accommodates standard end mill shank diameter
• 2.756-inch projection provides consistent tool-to-spindle-face distance
• TIR of 0.0004 inch for precise concentricity and reduced runout
• 1/2-13 drawbar thread matches standard NMTB30 retention hardware
• No through-coolant passage — suited for external or flood coolant setups

Compatibility

Designed for milling machines and CNC machining centers equipped with an NMTB30 taper spindle and a 1/2-13 drawbar thread.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine before installing or removing any tooling. Secure the holder using the machine drawbar to the specified drawbar torque listed in the machine manufacturer documentation — do not estimate drawbar torque. Inspect the taper bore and holder shank for chips or damage before seating; contamination between the taper surfaces will affect runout and retention force.