Collis 67842 CAT50 V-Flange End Mill Holder, 5/8" Bore, H5 Tolerance, Rc 52-56, ±0.0002"

The Collis 67842 is a CAT50 V-flange end mill holder designed for high-precision machining applications. It features a 5/8 inch bore diameter with an H5 tolerance to improve concentricity and tool life. The holder has a 3-3/4 inch (3.75 inch) projection and a 1-5/8 inch nose diameter. Constructed from material hardened to RC 52-56, the shank is ground to AT3 taper accuracy or better to ensure maximum spindle contact and exceed ANSI standards. The unit is equipped with through-spindle coolant capability and includes a set screw for tool retention. Technical specifications include a 1 inch-8 or 9/16-18 drawbar thread size and a concentricity of ±0.0002 inches. This tool holder is engineered to provide maximum rigidity and a generous working envelope for various milling operations. Year of manufacture is not available.