Yes, they are through all. They are for quick connect with a hairpin cotter pin.
Timeline: when ever.....month or less maybe.
Surface finish: Not sure. The factory finish looks finely machined and only has a very slight movement. It is plated. The inside hole surface coating needed to be factory sanded to get it to fit. Surface finish of 8 would probably do it.
After getting the mic out, there needed to be some dimensional changes. See attached.
After speaking with my engineer, I will need to do some redesign. The changes will require two more additional parts. Surface finish of 64, and a material that will be less expensive. New prints will soon follow.
After consulting my engineer....again.... I have revised the prints to eliminate most of the tight tolerances with the exception of a press fit between the shaft and collars. I will need 2 of each. Hopefully this will reduce cost. Thanks.
Kerry, the collars are missing a dimension for the step turned on the left end of the section view. This is on both collars, looks like you just need clearance? Please clarify.