What is the best marking compound to use when setting up a ring & pinion?
The best compound we have found for checking a pattern is a tan, “peanut butter” colored type. There have been other colors over the years, including a dark blue compound, however the dark color of the blue makes it difficult to get a clear view of the pattern against the dark color of the ring & pinion set. The tan color provides a good contrast of colors and is much easier to see.
