CYLINDER HEAD PORTING TIP
When doing port work and rolling the short turn radius, sometimes it’s difficult to get in there and get a good angle with the burr or sanding roll. I use a tapered cone type cartridge roll, but I flip it backwards on the mandrel. This will let you get to impossible angles that you wouldn’t normally be able to reach with the anything other than an inverted tree carbide bit. Even then, polishing is often impossible. I use the rougher grits to do the profile work as they’ll remove quite a bit of material on aluminum heads. Keep your speed down and the cartridge roll will rarely come unglued.

Ron Flood
Cedar Machine
North Branch, MN
August, 2021