Use multiple bearings on a big router bit
When I was making a 2-in.-thick oval lamp base and routing a profile on the edge with a big bearing-guided bit, I needed to make multiple shallow passes for a clean cut, free of burn marks and splintering. The easiest way to control those passes turned out to be a small collection of extra bearings. These are often sold as bearing conversion kits, with bearings in a range of sizes. I worked through the bearings from large to small, using the bit’s original bearing for the final pass.
—WARREN JONES, Birmingham, Ala.