We have been working on the rear sight for the FG-42 first model. The first picture that is a solid model of the entire sight assembly.
The next picture is a picture of the component parts.
The part we are currently working on is the base of the sight.
So now that you have seen the solid model it is now time to show you what the actual machined parts look like and the process that it takes to do it. The first step is to run it on the lathe.
After that there is 5 ops to complete the part.
so now back to step one on the lathe.
Not only is it turned but also drilled the the proper size on the inside.
The next step(op 2) is to cut the flats on the side of the base.
Then op 3 cuts the notches on the other end.
another picture from a slightly different angle.
With op 4 we cut the grove that allows the sight to slide up and down.
Another view.Then the pivot hole is drilled and a slight bevel is cut into one side.
A better shot of the bevel.
The last and final op is to cut the bevel on the opposite side.
This is the first set to be cut.
To give you an idea of the time and money necessary to complete this one small part. The time to solid model this part from the 3-D scans was a couple of hours,time to write the lathe and mill programs and set up the machines was approximately 8 hours. Material cost was 60.00. Run time on the lathe is 5 minutes per piece and run time on the mill is 10 minutes for a total run time on this part at 100 hours. Tooling costs is 200.00. This makes a cost to make this one small part approximately 25.00 each.
I will have a video on making this part in the next week. Thanks for staying tuned in.