We have finally finished machining the last part for the AR-180B safety. This is the master cam video showing the steps that were performed to complete this task.
With this last installment we have now completed machining the safety for the AR-180B. This picture shows all the steps that we took to make the safety selector. The bottom on is an original.
A close up of our safety to the original AR version.
We installed the newly made parts on my AR-180B rifle to verify proper fit.
You can see that both the pivot pin and safety fit properly.
Our next step is waiting for the medium to come in to de-bur everything them off to heat treat on the shafts and start parkerizing the parts
Short post for today, to much work yesterday and to little sleep. We finally received in the laser cur blanks for the bolt hold open lever. It looks good. We will need to finish machining it and then make a press tool to bend it properly.
This post will conclude the machining part of the AR-180B pivot pin for the bolt hold open. We have finally completed the machining portion of this project for this part. Here are the pictures.
This is the process from start to finish.
Our copy compared to the original. I will start parkerizing this next week end.
They are all complete.
I generally do not write about political or government garbage but this one is important. It seems that this government has a thing against guns and free speech. It seems to bother them and they are trying everything to stop it.
This is from the NRA web site concerning the current move by this administration to ban site such as this. This is being done by presidential directive and not by law. I guess someone forgot to tell this administration about the Constitution and how this government works. No King has been elected here.
“Also regulated under ITAR are so-called “technical data” about defense articles. These include, among other things, “detailed design, development, production or manufacturing information” about firearms or ammunition. Specific examples of technical data are blueprints, drawings, photographs, plans, instructions or documentation.”
Please call your Representative.
Today after making parts for the Ar-180B was completed I started back trying to get the Japax wire edm to work. When 9pm came about I finally stopped. A great deal was accomplished today. Starting with getting the upper head to move to being able to write, post and run a basic program. This post is the start up of the machine and how to move the table and the upper head of the machine.
I started this series because there is not much written or on video out there about operating the Japax wire EDM. These EDM’s are not the most modern of machines, but there are becoming available to small shops at a price that allows use to purchase them.
My goal with this series of video’s is to allow someone that happens to come across one of these machine be able to learn how to operate it.
I once again have to thank the guys over at McWillams sales and service (http://www.mcwilliamsedm.com/index.html) for their help in getting my machine up and running.
In the next post we will write and down load a progrem and run it in dry run.
This post is about making the pivot button for the bolt hold open device for the AR-180B.
With no engineered drawings to work from the first item of business to take care of was making a drawing of the part with all the dimensions. To do this we used micrometers, feeler gauges and an optical comparator.
Using these measurement devices we were able to accurately measure the the complete button. We also used references from parts suppliers to verify correct dimensions for matching components.
Side-Mount External Retaining Ring (E-Style)
Black-Finish Steel, for 7/32″ Shaft Diameter
|For Shaft Diameter
Snap rings into the groove from the side of the shaft. Their three prongs make contact with the shaft and provide a wider shoulder than other external retaining rings for a larger retaining surface. They are magnetic.
Black-finish and zinc and yellow chromate-plated steel rings have a minimum Rockwell hardness of C47.
Next came a solid model of the part.
A program was written with master cam to run on the cnc lathe.
This is the video of machining the part on the lathe.
This is an picture of the part as it comes off the lathe when the first op is completed.
A comparison of the original part to the newly machined one.
What has been done so far with still more to be made.
The second op to come
Today is a shop day as I am trying to get the pivot buttons completed for the AR-180B and finish the third op on the selector knob. I will post a video later today on time in the shop. I also chatted with Todd at McWilliams company and he was a great help on the Japax wire edm. I hope to have another video on the Japax this weekend as well. Later for now.
This is the video of the actual machining of the AR-180B shaft. This is the first op in making this part. From here it will nest go to the mill to have the various flats, slots and holes drilled. Now on to the first op.
With the first op complete the next step is to write and set up for milling the part.
All the safety shafts turned.