Hi, I'm Mark Serbu, lifelong gun nut, degreed mechanical engineer, gun designer, founder and owner and president of Serbu Firearms, Inc. I'm also a pretty decent self-taught TIG welder, machinist, CNC programmer and assembly guy. I'm trying to teach the basic principles of firearm design and engineering (which apply to ALL product design and engineering), including mechanisms, materials, heat treat, stresses, math, etc. Thanks for stopping by!
Wouldn’t slight beveling have resulted in greater depth? I realize you would have then needed to add filler metal. Is that something you wanted to avoid?
As always, love watching you work. I love work, I could watch you work all day, lol. Seriously wishing you all the success possible. Love the grease gun. ROF and 45 ACP is a perfect combination!
Remember kids...the govt will.give or sell these to almost anyone in other countries but will chop slice or torch them up to keep you from getting something your taxes paid for in the first place.
Nothing like getting smacked with the yellow dollar sign while uploading! They can groom kids but don't you dare post informative , helpful info on guns.
Hey Mark, do you offer any type or brand or model of any gun for building any weapons comprising of an 80% parts kit, or any other complete parts kits for assembling any guns? Any kits whatsoever? I remember a video you posted a couple years back regarding your GB 22 80% parts kit, and your desire to develope and sell more parts kits of various other gun types to offer for sale. Did any of that ever come to bear fruit?
As a mechanical engineer, although not a gun designer, I can give you some insight if you want to learn how to design guns - it helps if you know how to calculate forces, pressures, impulses, etc. by hand. It helps if you have a good intuitive understanding of kinematics/how things move behave/interact with one another. You should have good materials knowledge of why to pick certain steels or aluminium alloys above others, and in what locations on the gun you need to use better performing materials. You should know how things are manufactured and how much certain operations cost if you want to go in to production. What parts can be cast, what parts need to be milled, where you can use bent sheet metal, aftertreatment, etc. These choices may depend on cost or the forces and pressures and criteria the parts will have to withstand. For an instance, you dont want to cast bolt locking lugs as cast steel is more porous and prone to cracks after many load cycles, than a milled bar of steel. You may also want to be aware of how radius choices affect stress concentrations and the risk of cracks in your designs. Other than that, a good CAD software such as Autodesk Inventor or Solidworks or even Fusion 360 will work for the modelling part, although you may as a first step just want to draw your concept on paper, as that will be way quicker if you are unsure of what you want to design. If you after having a CAD model want to get more advanced, and to be safe (more safe than with hand calculations), you should do some FEA (Finite Element Analysis) of your design to see that the stresses and so on in your parts to not overstress your materials. There are basic FEA modules in most CAD software, that are probably best to start with as most people cant afford professional FEA software licenses on their own, such as ANSYS, Abaqus, LS-DYNA, etc. But performing FEA calculations also require a lot of know-how and can easily be performed wrong or be interpreted badly by someone who is inexperienced. -In short, you need to have good general engineering knowledge if you want to design gun mechanisms as they are moving systems under very high pressures. //J
@jay_no3 i basically know materials and some about heat treatment .but the rounds i am most interested in designing as somewhat of a newbie would be lower pressure rounds . The reason for wanting a simulator is so tge designs that run through my head for guns and other machines dont keep me up at night wondering about clearances and angles .the pressure with quality materials and low pressure rounds will take care of itself , in addition to carefully looking at spent rounds for signs of overpressure. So safe to say that when i find my limits and im sure i will i wont be close enough to matter
@@stevebelcher1527 Im guessing you dont have an engineering background, since the "simulator" youre asking for actually is FEA software, like i just mentioned. I dont recommend you to design anything unless you know what youre doing. However, there is Simscale online which is a cloud FEA solution. There are also free multi body simulation motion softwares such as FreeDyn and Solvespace which I found by Googling.
Interesting piece of history, never seen one in person only in movies. Also that they were stamped out of metal is crazy. Seems as if those would have lots of recoil also. 👍🏼
Did you put your threaded hole in the wrong end of the mandrel? Great video, and an even better project. I'd give my eye teeth and a molar for a grease gun. It's my favorite sub.
This looks a lot like the subs that were made & looked like sewing machine parts - to be assembled by the resistance. saw a book once by Gerade Metral.....
