Value Collection 210-0404 Shell Mill Holder R8 Taper Shank

Product Description

The VALUE COLLECTION 210-0404 is an R8 taper shank shell mill holder designed for milling machine spindles that accept the R8 taper interface. It accepts shell mills with a pilot diameter of 1-1/4 inches and is rated for shell mill cutting diameters ranging from 3-1/2 to 4 inches. With an overall length of approximately 6.14 inches (156 mm), this holder provides the rigidity and concentricity needed for face milling operations on knee mills and similar vertical milling machines. No through-coolant provision is included. Machinists and tool-and-die shops rely on this style of holder for accurate, repeatable shell mill indexing during production and maintenance work.

This shell mill holder is suited for use on vertical knee mills and Bridgeport-style machines equipped with R8 spindle tapers. It is appropriate for light to medium face milling, surface milling, and shoulder milling applications in job shops, maintenance facilities, and manufacturing environments. The 1-1/4 inch pilot accommodates standard shell mill arbor bores in the 3-1/2 to 4 inch cutting diameter class, making it a practical general-purpose holder for common production milling setups.

Key Features

• R8 taper shank for direct spindle mounting on compatible vertical knee mills
• 1-1/4 inch pilot diameter fits standard shell mill arbor bores
• Supports shell mill cutting diameters from 3-1/2 to 4 inches
• Overall length of 156 mm (approximately 6.14 inches) for extended reach in milling setups
• No through-coolant port — suitable for dry or flood coolant applied externally

Compatibility

Designed as an OEM-style replacement or standard tooling addition for vertical milling machines with R8 spindle tapers accepting a 1-1/4 inch pilot shell mill holder.

Installation Notes

Installation is performed by a machinist or tooling technician. Before mounting or removing any tooling, disengage the spindle drive and allow all rotating components to come to a full stop. The R8 shank is secured in the spindle with a drawbar; ensure the drawbar is properly torqued per the machine manufacturer specification before operating. Inspect the taper shank and spindle bore for nicks or burrs before seating the holder, as surface damage will compromise concentricity and tool life.