Search found 99 matches

by BinaryAndy
Fri Apr 17, 2015 7:15 am
Forum: Silencersmithing Forum
Topic: Chytac in final steps
Replies: 12
Views: 1644

Re: Chytac in final steps

That looks fantastic, nice work.

Out of curiosity, what kind of bar did you use to bore 8" deep? I'll bet that wasn't the most fun part of the process. What kind of lathe did you use?
by BinaryAndy
Mon Apr 13, 2015 11:30 am
Forum: Silencersmithing Forum
Topic: form 1 - Two cans to cover 5.56 to 375CT
Replies: 2
Views: 765

Re: form 1 - Two cans to cover 5.56 to 375CT

You'll need to decide how you're going to use each gun, and how much weight and size you can tolerate putting on the end of the barrel. You'll need to design one can to work on your biggest round, the 375. I don't have dimensions for you, but that's a huge round so it's going to be big and heavy. Th...
by BinaryAndy
Thu Apr 09, 2015 5:34 pm
Forum: Silencersmithing Forum
Topic: Need a blast sheild
Replies: 25
Views: 3912

Re: Need a blast sheild

I did love your Jedi reference Brilliant! -CL Well, I'd never heard the term "blast shield" in reference to muzzle devices before, so when I saw the thread title, that scene from Star Wars was literally the only thing I could think of. "But with the blast shield down, I can't even see! How am I sup...
by BinaryAndy
Thu Apr 09, 2015 4:16 pm
Forum: Silencersmithing Forum
Topic: 17-4ph stainless
Replies: 5
Views: 999

Re: 17-4ph stainless

17-4 is significantly better than 304 and 316 in an awful lot of ways. It has dramatically higher yield strength, tolerates high temperature better, and at least in the hardened state it's much more resistant to erosion and deformation from the muzzle blast. It's an excellent material for a suppress...
by BinaryAndy
Thu Apr 09, 2015 10:18 am
Forum: Silencersmithing Forum
Topic: Need a blast sheild
Replies: 25
Views: 3912

Re: Need a blast sheild

I don't see much of a difference in design or function between a sleeved muzzle brake and the first inch or two of a suppressor. Clearly it's not going to reduce sound enough to matter to anyone who's not a heck of a bureaucrat, but ATF officially takes the hard-line stance that anything that reduce...
by BinaryAndy
Mon Apr 06, 2015 4:21 pm
Forum: Silencersmithing Forum
Topic: Need a blast sheild
Replies: 25
Views: 3912

Re: Need a blast sheild

Image
by BinaryAndy
Mon Apr 06, 2015 11:37 am
Forum: Silencersmithing Forum
Topic: damage bolt face on barrel
Replies: 15
Views: 1396

Re: damage bolt face on barrel

It all depends where and how big the dent is. Most importantly, is the chamber itself deformed at all? If the chamber was effected, then you'll need to fix that, and it won't be simple. If the chamber is undamaged, then the problem, if there is one, would be the metal that's raised up around the den...
by BinaryAndy
Sun Mar 15, 2015 4:46 pm
Forum: Silencersmithing Forum
Topic: Savage MKII Integral
Replies: 19
Views: 3213

Re: Savage MKII Integral

If I remember right, the barrel on my FVSR is more like .80" in diameter. Don't practice on a barrel, that could get you in trouble. Just get a piece of 4140 prehard round stock, that should be very close to what Savage uses for barrels. I still don't see how you're going to enlarge the bore through...
by BinaryAndy
Sun Mar 15, 2015 12:04 am
Forum: Silencersmithing Forum
Topic: Savage MKII Integral
Replies: 19
Views: 3213

Re: Savage MKII Integral

On second thought, I would definitely avoid using your expensive carbide drills to do overlapping holes like that. It's a heavily interrupted cut which I don't think solid carbide is going to put up with. A cobalt end mill would be my choice for that cut, and there are very few drill presses that wi...
by BinaryAndy
Sat Mar 14, 2015 11:44 pm
Forum: Silencersmithing Forum
Topic: Savage MKII Integral
Replies: 19
Views: 3213

Re: Savage MKII Integral

Bender, I think this is more or less what he's talking about. (WinMag, correct me if I've misunderstood.) http://i375.photobucket.com/albums/oo193/BinaryAndy/WinMags%20MKII_zpstxhi4yng.jpg Remember you'll need to enlarge the bore hole for the part of the barrel that becomes baffles, so that there's ...
by BinaryAndy
Tue Feb 24, 2015 5:59 pm
Forum: Silencersmithing Forum
Topic: HELP turning titanium. Locking up.
Replies: 39
Views: 3067

Re: HELP turning titanium. Locking up.

That doesn't work so well on my old Atlas 12 x 36. I tried something like that with some stainless a long time ago. The work will wobble and on one occasion the work popped out of the jaws. IIRC the Atlas manual recommends a two point mount using the steady to better secure the work, and give more ...
by BinaryAndy
Fri Jan 16, 2015 12:02 pm
Forum: Silencersmithing Forum
Topic: Going to do a rimfire can
Replies: 49
Views: 8835

Re: Going to do a rimfire can

K baffles do their best work with relatively low pressure rounds, that's one of the reasons nobody uses them on centerfire rifle cans. They work very well for 9mm and 45, which both have a whole lot more pressure at the muzzle than any 22lr, HV or not. I don't see any reason why the projectile being...
by BinaryAndy
Mon Nov 10, 2014 9:28 am
Forum: Silencersmithing Forum
Topic: Tube and baffle materials?
Replies: 12
Views: 1412

Re: Tube and baffle materials?

Whether or not you should spin it as fast as you can always depends on how fast you can. For 316 or 304 SS you should be around 70 to 100 surface feet per minute with HSS tools, probably 150 to 180 with brazed carbide or cheap inserts, or up to 400 (check the manufacturer's recommendations) for good...
by BinaryAndy
Mon Nov 03, 2014 2:19 am
Forum: Silencersmithing Forum
Topic: short fat can for 300 Blackout
Replies: 6
Views: 1581

Re: short fat can for 300 Blackout

What do you have against 17-4 aside from its machining pains? No no, just that. 17-4 is among the best materials for the job in my opinion, I just wouldn't want to put that big of a hole in it or any SS alloy for that matter. In fact 17-4 is probably one of the easier alloys to make a tube out of, ...
by BinaryAndy
Sun Nov 02, 2014 1:55 am
Forum: Silencersmithing Forum
Topic: short fat can for 300 Blackout
Replies: 6
Views: 1581

Re: short fat can for 300 Blackout

Samson104 wrote: I plan use 17-4 round bar bored to tubing...
I plan to actively avoid ever using 17-4 round bar bored to tubing.

I'd bet you would be better off with more than three cones.
by BinaryAndy
Sat Nov 01, 2014 10:55 am
Forum: Silencersmithing Forum
Topic: Lathe tooling? HSS, Inserts and brazed carbide?
Replies: 16
Views: 1861

Re: Lathe tooling? HSS, Inserts and brazed carbide?

I have a couple of AR Warner holders and inserts. I've got their ID/OD threading tool and the ones for CCMW inserts here: http://www.arwarnerco.com/p-15-kit-11-12-inch-turning-c-right-hand-left-hand.aspx I don't recommend the threading tool. The OD side of the tool is okay, but laydown inserts are b...
by BinaryAndy
Mon Aug 25, 2014 9:06 am
Forum: Silencersmithing Forum
Topic: Helicoil for mount threads?
Replies: 10
Views: 1863

Re: Helicoil for mount threads?

I was going to suggest solid thread inserts rather than the heli-coil type, but a quick search on McMaster seems to indicate that none of them are available with 1/2-28 as the inside threads. Yeah, and I don't think you'll find 1/2-28 Helicoils either. It's an extra-fine thread, nobody outside of t...
by BinaryAndy
Fri Aug 22, 2014 9:21 pm
Forum: Silencersmithing Forum
Topic: Exact measurements for making a 9mm silencer
Replies: 14
Views: 6437

Re: Exact measurements for making a 9mm silencer

Those outside dimensions (1.375x8) are pretty much exactly the industry standard for 9mm, so that's a good place to start. The proper length of a baffle is a function of its diameter and its design. I think you'll find a well designed K in a can that size will end up somewhat less than an inch long.
by BinaryAndy
Thu Aug 21, 2014 7:51 am
Forum: Silencersmithing Forum
Topic: some one please school me on aluminum
Replies: 19
Views: 3239

Re: some one please school me on aluminum

Yeah, I don't think I've ever seen 7075 tube, and that does suck. 2024 is really pretty good though, just a notch down in strength. In fact, in your application it might even be a better choice; it's supposed to put up with heat a little better than 7075. That's just hearsay of course, and I don't h...
by BinaryAndy
Wed Aug 20, 2014 11:42 am
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 3031

Re: grade 9 drilling question

As far as general machining of titanium goes, I find it machines more or less like angry stainless. It work hardens similarly, sticks to tools a bit more, and it's not very stiff so rigidity is harder to come by. Turning, I treat Ti, 304 and 316 pretty much the same, none of them give me any trouble...
by BinaryAndy
Wed Aug 20, 2014 10:34 am
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 3031

Re: grade 9 drilling question

I don't think your speeds are really too far out of line for a 1/4" drill. I wouldn't go much faster than 400, and you can always try it slower if it works. How often are you pecking? With Ti and flood coolant you want to retract as rarely as you can get away with. I wouldn't peck at all with a para...
by BinaryAndy
Wed Aug 20, 2014 8:34 am
Forum: Silencersmithing Forum
Topic: some one please school me on aluminum
Replies: 19
Views: 3239

Re: some one please school me on aluminum

There's also 7068 and a handful of other 7000 series grades that may be marginally better, but 7075 is pretty much the best you can actually find and very nearly as good as it gets without going to exotics like lithium and scandium alloys. I would tend to keep aluminum away from high-volume, full-au...
by BinaryAndy
Wed Aug 20, 2014 6:37 am
Forum: Silencersmithing Forum
Topic: Helicoil for mount threads?
Replies: 10
Views: 1863

Re: Helicoil for mount threads?

A helicoil will hold up a lot better than aluminum threads, though I don't know that I'd trust it to align accurately. In any case, good luck finding a 1/2-28 helicoil. I wouldn't worry too much about the threads holding up in 7075, especially if you get it hard coat anodized (which you should). If ...
by BinaryAndy
Sat Aug 09, 2014 11:27 am
Forum: Silencersmithing Forum
Topic: PTFE for baffels
Replies: 7
Views: 1293

Re: PTFE for baffels

In a 223 can even aluminum doesn't hold up well. I might make a 22lr suppressor from plastic one of these days, but I'd never want the stuff on the inside of a centerfire can.