Stud Boss Cutter w/Arbor & Pilot

The Stud Boss Cutter w/Arbor & Pilot by COMP CAMS is a precision machining tool engineered for engine builders, mechanics, and armorsmiths who require controlled valve train geometry. This specialized cutter removes rocker arm stud bosses on cylinder heads with exact tolerances, enabling proper valve clearance and preventing component interference during high-performance or tactical firearm builds. The tool's compact footprint and modular design make it essential for any shop performing detailed mechanical work.

Manufactured from hardened steel, the Stud Boss Cutter features a 0.365 inch pilot diameter, 1.150 inch outer diameter, and 0.330 inch inner diameter that work together to establish precise cutting geometry and bore concentricity. The integrated arbor and pilot assembly eliminate setup time and reduce runout errors common with improvised tooling, while the steel construction ensures durability through repeated use. The pilot guides the cutter perpendicular to the work surface, critical for maintaining the correct angle and depth during material removal on cast iron or aluminum cylinder heads.

This tool is indispensable for gunsmiths and engine builders working on vintage small-block and big-block applications where stud bosses must be precisely trimmed to specification. The lightweight design—0.41 pounds—allows for one-handed operation in confined engine bay spaces, while the 2.8 x 2.05 x 4.1 inch profile ensures storage in standard toolboxes. Installation requires a standard milling machine or drill press with the appropriate spindle speed and cutting compound; compatibility with both wet and dry drilling operations makes this cutter versatile across different shop environments and production volumes.