With the SAR show coming up we have a group of people staying at the house. So the Wednesday prior to the show a couple of us put on a small machine gun shoot, just to have some fun. Some of these shoots have ended up being a couple of hundred people in attendance. This […]
Not that we have finished running the parts on the machining centers it is time to do the final fit up. Using the 1018 trunions that we made a hole was drilled in it to allow alignment with the button pressed into the receiver. Then the blocks were tested to see if the fit up […]
With these last three operations we will have completed the work on the cnc machining center.
You can see the process of rough machining the bottom of the curve for the trunion. This op also machined the complete magazine well out.
A good side view of the rough machining of the curve.
All the […]
It has been a while for a MP-44 trunion update. The next couple of posts will get us back up to date with the trunion project.
The new op 5 was to cut a slot and rough magazine opening to allow coolant flow and chip removal and still allow us to high speed machine.
In this post we are going to look at how the badly cut up and rusted lower portion of the MP-44 receiver was repaired. You can see in the first photo the condition of the under side of the lower front portion of the receiver.
The first set was to cut out the bad section.
With this post I am going over a few of the problems that have occurred during the machining of op5 on the 4140 hardened trunions. We ran into a snag while doing this op. A problem that did not occur on the 1018 steel parts.
A quick video discussing the problem and solution.
We have started on Pete’s, a friend of gun lab, new 4140 MP-44 trunions. This series of videos and posts is the process we used to make them.
First the video.
Here are the pictures going over the changes and the steps we took.
We needed to change the depth of cut for […]