Working on the Gatling Gun again... started 17 years ago! Maybe 2020 is the year to finally finish.
I have the box cam completed and the complete breech casing, frame, etc and using Cutter's (Jerry's) one piece bolts. I am at the point of cracking and seeing everything mover around. I am getting some drag on the "square patch" around the cam pin on the bolt with the inside diameter of the box cam. This square patch is a left over amount of material left after the pin is machined, then the bolt stood on end to remove the rest of the hub that was used for the pin. The diameter of the bolt head under the end cap is .490 and this patch stands proud of the surface about .020", which would be about .015 over a .50 diameter. The bolt head/caps measure .50. With a .50 diameter, there is only .010" clearance between the inside of the cam (2.520"). I guess I could have made the cam with a larger ID, the solid piece would be easy enough to bore out, but the rear piece is another story. I filed the "square patch" down on one bolt and it slides freely in the cam with the carrier block and barrels all assembled and cranks very easy. No cocking section yet, just moving bolts in and out.
Anybody else ran into this interference issue with the way the one piece bolts are machined leaving this little "square patch"? The bolts diameters that go in the carrier block are measuring .416-.417". My carrier block bores are measuring .4195-.420". Enough clearance to be able to crank with the interference, but definitely need to be address the drag on the rest of the bolts. I had bought some extra, so had one to play with. Just wanted to know if there is another way other than filing down the extra material on the bolts. They look great as received and filing will have some cosmetic issues. Won't see it inside the gun, but I will know it is there.
RUGER STYLE EXTRACTORS
I also had bought ruger style extractors from Cutter with the bolts. I made a jig to hold them for the machining like what was posted on one of these pages. Does anybody break the edge of the square piece of the extractor that will be sticking in the hole that is at a 5 degree angle? a sharp edge seems not so good. Breaking the edge will allow the extractor to move forward and more clearance on the rim of the cartridge. Anybody done anything with this? I do have a .dxf file from Cutter for the machining.