JWinAZ
Active Member
Apertures of 0.050” are no longer useable for me. On a bright day I can use 0.075”. I have several that can be opened up. This required a multiple step plan to do. First, I needed a way to hold and drive the tap. The .216-40 tap has a very short male taper that would not work with my tap followers. I started with a small tap chuck with ¼” drive, then made a holder for the chuck. This will be something I can use in the bench mill too.
Next, I made a fixture to hold the aperture by drilling and tapping a short piece of 12L14.
Very easy to thread the aperture in and drill to the desired size, in this case a number 49 (0.073”) drill. Now to the range.
Next, I made a fixture to hold the aperture by drilling and tapping a short piece of 12L14.
Very easy to thread the aperture in and drill to the desired size, in this case a number 49 (0.073”) drill. Now to the range.