Weekend project...Now finished!

NavyShooter said:
A friend of mine with a "LOT" of machining experience told me that for firearm applications, (especially anything with a bearing surface) I should avoid using leaded steel (11XX) and use 10XX.

NS
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That is good advice, the free machining steels have terrible toughness and that is the last thing you want in a weapon containing high pressures applied at extremely high strain rates.

As a side note, 4140 is generally considered very easy to machine. What are you guys comparing it to? 7075 is decent, too. At least it is hard enough to chip off properly. 6061 is terrible to machine, all gummy and hard on tools.

A small, fiddly part like that firing pin out of S/S using HSS tools requires a LOT of patience. Nice work, NS. You even got a decent surface finish on it!

Mark
 
It took a bit to find the perfect insert grade that balanced tool life and cut quality but once we found it, things go smoothly. It took some time to get used to putting a $50 or $100 bit in the machine and then throwing it out 2 days later.

Tooling is damn expensive!
 
NavyShooter said:
Here ya go.

Hope you don't mind, the only 1/4" stock I had handy appears to be stainless....which might explain why I was getting such small cuts using the HSS bit....

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Or at least, I couldn't blue it when I was done!

Drop me a note with your addy and I'll mail it out first of the week.

NS
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You are a god........

Well at least a true friend.
 
I'm spoiled. Its amazing what some of these new cutting tools can do. It boggles my mind to think what the future holds.
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I know my brother inlaw is one of the Sandvick reps for southern Alberta and when he tells me about some of the new stuff thats out there out its crazy
 
Hey NS,

I should have bought a bigger mill ;) Even those BB round-column machines like yours are much better for heavy cuts than the benchtop I use. I think you run a SB similiar to mine though... ;)

Drop me a PM - where are you in the Navy? I was at CFB Haifax most of this past week :)
 
As an aside, I found a nice Tapco SAW style (C-9 style for us Canucks) pistol grip to add to it. I put that on and found that it even had a little gap coverer built right in, almost like I planned it that way!

Now I need to stock up on some 35mm film cannisters and do some re-loading! Who wants to play?

NS
 
All that and it's not even a 'gun'*

(*for the purposes of legislation, as a safety note never irritate a person holding said 'non-gun' those buggers can hurt you, especially with live ammo)
 
"Thumper" lives!
NS....very nice..
I envy anyone who can use machine tools, weld, etc., to this level.
Makes me want to sign up for 'Shop 101' at my local community college!
 
Yeah,

I usually wander into a camera store and explain I need some of the black/grey ones for a school project for my kid. They dump 'em on me like there's no tomorrow!

NS
 
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