Honing Machines - Nagel USA

Honing Matters — Getting the Bore Right When honing an engine block, there are a lot of factors to consider — and plenty of pitfalls to avoid. Establishing a bore with no runout or taper is critical to ensuring proper piston wear and ring seal. But that’s not all — waviness and what’s known as a “rainbow” shape in the bore can also cause major issues. The problem with a rainbow-shaped bore is that a conventional bore gauge can’t measure it accurately. An Incometer-style gauge can map the bore an