Making Copper Bullet Jackets: Machining Punching & Drawing Dies! Part 4
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- Опубликовано: 19 сен 2013
- This Video:
We finish machining the threaded holes and dowel pin holes in the bottom half of the die, discuss a calculation error that a sharp-eyed viewer caught (thanks!), discuss some more tweaks to the overall design, then put the combined halves of the die body in the Emco lathe's 4 jaw check to test the runout with the dial indicator!
This Series:
Having been a long time shooter and reloader, I am undertaking my next project for my new Emco V13 lathe: Making Copper Bullet Jackets. The process steps are to blank a copper coin out of a strip of copper, cup it, then draw it in to progressively longer and thinner-walled shapes. The goal in this project is to end up with a 9MM jacket which will be about 0.6" long and 0.352" in diameter. That jacket can then be used in a swaging system (e.g. Corbin) and combined with a lead slug to make an actual bullet!
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I just want to say that including your mistakes and explaining them in detail really makes a big difference for people who are starting out with this kind of stuff. so, thank you for pushing through the embarrassing. it's really great!
yes, thank you!
it's important to see how people think and solve problems, and mistakes show that better than perfection, a lot of the time.
if we just see how to do something, that may not include anything about why that way is best-but little asides like "tool and die level precision" (which changed the way I was thinking about the topic of that video) or showing the content of mistakes help us to understand why.
Keep up the good work, John. A lot of us are learning along with you. I appreciate the step-by-step informative bloopers and also admitting any of your mistake or misconceptions. The process is helping us all!
Not to get too mushy, but I will. Love your videos, spent the last week going through them and I'm still not yet to where you have the new shop. Thank you. You and I are pretty close to the same age, and I'm just learning the trade, long over due. My grandfather was a machinist, I always looked up to him, and enjoyed his stories. I intend to be self taught, like you. All joking aside, you are what the American dream is supposed to be, thank you for taking the time with these videos, much appreciated.
I love the idea to let the cups keep stacking up inside the cutter/die. That will save a lot of time not having to pull it clear of the press each time.
Great stuff!! Keep it coming! :)
Not me, my dad is. I only picked a few things up from him with my hobbywork, but they are simple no BS rules that kept me grounded. He always says to me "It's not like your making a watch." That is kinda true with die-making. He is a T&D Maker, union guy, genuine hero of course. The no experience fellas are going to love these videos. Great detail and food for thought. Your welcome, Caleb.
Looks great John! Very cool :)
I'm glad you realize what 0.0003" is and isn't. You were right to think that you really can't trust what you are seeing on the indicator. If you would have farted a good DTI would deflect some. A B&S Bestest indicator would be your favorite tool if you were to get one. Get a half a tenth DTI, you are already so much farther along than most by realizing what 0.0001" is and you will gain so much with a good indicator. I will be blown away if you can produce an accurate firing jacket. Cool stuff!
Keep the great vids coming
I like this stuff very interesting
good job
I just sent you an idea for an adapter, but it sounds like it's after the fact. :)
When I get on a project like this, I'm always torn between wanting to get the vids up and staying on the project!!
Looking forward to Part 5!!
It has it's short comings, but I'm pretty pleased with it. For my first CNC project I wanted something that had a large online community behind it, or I would have gone with the larger ZX45. I'm in the process of converting my little G0602 now :)
I'll have to try your method of tightening all four jaws first, then adjusting for zero run out.
Yeah I used his plans because I was afraid to waste a bunch of money messing up my own design. On the G0602 I'm making it all myself. I'm excited to see how it turns out :)
This is probably a really dumb question from a non-machinist, but, in order to achieve perfect pin alignment, why did you not drill/ream the holes through the piece, then part it into two pieces? I love these videos and your honest approach to mistakes etc. Very informative and a pleasure to watch.
I'm not really sure. I actually hold on a specific part of my cross-hairs (where the thin line meets the thick line) and can drill them almost every time. If I ever change scopes I would have to learn a new hold.
you should ream it as an assembly
Hi John nice video, have you checked the run out with the parts turned 180deg? maybe a hash mark is needed for orientation, just a thought
Hi John,
First off, GREAT CHANNEL! I'm going through your library one video at a time and I have to tell you, I am very impressed by both your craftsmanship and your candor. It's not often someone of your skill level and talent admits to, or even shows their mistakes, especially on video. Normally what we see on other channels is how perfectly their project went and who know's what ended up on the cutting room floor, as they say. Great job!
Anyway, I'm very new at this (even a the age of 58 I'm taking up a new hobby such as this, lol's) and can you please tell me why you didn't drill the screw holes and dowel holes before you parted the work piece? I mean, if alignment of the two pieces is critical it just seems to me one would drill the holes in the whole piece of material and THEN part it off. That way the holes be in alignment from the start. Just something I would like to know for future reference and, as I said, I'm very new to this. Thanks!
BTW, I like your FB page...
It's definitely possible with no wind. I tried shooting Prairie Dogs with it, but couldn't go past about 150 due to wind.
Super interesting stuff you do there! I already subscribed on Facebook :D But I do have one question as a non machinist. Would'nt the leveling out be much easier with a 3 jar? I realy don't know ... but a table with 3 legs is never wobbly =)
alright clue me in here. what is a bestest indicator? is that the one with the little flippy lever instead of a plunging thing to do the measuring? you like these high tech terms dont you? b&s im assuming is brown and sharp.
You didn't add a FB link below
I know this sounds like a lie, but I regularly brake clay pigeons (stationary of course) at 300yrds with my .17HMR.
lol...no i swear im not crazy! well maybe. cause im pretty sure bestest is not a word! But when searching google i noticed one style of dial indicator is referred to as bestest {the ones with a little lever, not the "normal" style with a plunging stem}. Poor Chinglish conversion? Possibly! Do a search you will see what i mean :) Its hard to sort through whats slang, whats b.s. and what are tiny nuggets of knowledge glistening in the crap pile :)