Down to the nitty gritty details. I need to make sure that the thickness of the cover is spot on, because there is only 0.020" (0.5mm) under the screws, and the main part of the cap is 0.035" (0.9mm) thick. I plan to put a bunch of engraving on this cover, both inside and outside (August).
Here’s how I ensure accuracy from the outside surface to the inside surfaces. The stock measures 0.375" (9.5mm) so I use this as a base and then use a drop indicator.
Then I made a map of where I need to be on two key dimensions:
And then I machine (and check) to those dimensions: Here I am at 0.158 verses the 0.0180/0.0185 target. (0.022/0.027 more to go.)