Value Collection 219-9538 Milling Machine Arbor NMTB50

Product Description

The VALUE COLLECTION 219-9538 is a Style B milling machine arbor with a taper shank designed for use with NMTB50 spindles. It accepts a 1-inch arbor diameter and delivers an overall length of approximately 30.88 inches, making it suited for extended reach milling setups. The 2.125-inch shank diameter seats firmly in the machine spindle, while a 24-inch shoulder-to-nut length provides substantial working projection. The arbor ships with two spacers and a running bushing, giving the installer the components needed to configure the setup without additional hardware. Licensed machinists and tool-and-die professionals are the primary installers of this type of tooling.

This arbor is intended for horizontal milling machines equipped with an NMTB50 (National Machine Tool Builders) taper spindle. It is commonly used in production and job-shop environments where shell mills, side-and-face cutters, or gang milling setups require a rigid, accurately ground arbor. The 1-inch bore diameter accommodates standard inch-series milling cutters. A drawbar thread size of 1-8 is used to secure the arbor within the spindle. Both light-duty profiling and heavier material removal applications are appropriate for this class of tooling when properly supported.

Key Features

• Style B taper shank arbor with NMTB50 interface for positive spindle registration
• 1-inch arbor diameter fits standard inch-series horizontal milling cutters
• Overall length of 30.88 inches with a 24-inch shoulder-to-nut working length
• 2.125-inch shank diameter provides robust connection at the spindle nose
• Drawbar thread size of 1-8 for secure spindle retention
• Includes two arbor spacers and a running bushing for complete setup

Compatibility

Designed for horizontal milling machines equipped with an NMTB50 taper spindle and a 1-8 drawbar thread. Accepts standard inch-series shell mills and side-and-face cutters with a 1-inch bore.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's procedures. Ensure the machine is fully powered down and the spindle is locked before inserting or removing the arbor. Confirm the spindle taper and drawbar thread match the arbor specifications before attempting installation. The arbor and spindle taper surfaces should be clean and free of nicks or chips to ensure proper seating and runout tolerance.