Edge finder

[threesixesinarow]

Someone posted these irresistible old Belgian toolmaker apprentice prints for an edge finder to the “Machinist Museum” group on Facebook. They also showed a boring head, a hand drill, vernier calipers and depth gauge, and a surface gauge.

Based on those, mine’s only lightly modified and it’s 60% the size. I don’t know how that would affect my grade, but it seems to work alright and it’s a good size for my Unimat and other small machines.





Parts



Some operations



In a Unimat drill chuck, and next to a 3/8” shank Brown & Sharpe edge finder for scale