Search found 567 matches

by ECCO Machine
Wed Jan 22, 2020 12:27 pm
Forum: Silencersmithing Forum
Topic: Stainless steel
Replies: 14
Views: 323

Re: Stainless steel

XD15 seems to be a variant of 440C with inproved corrosion resistance from what I can find. One thing to remember about the 440 class alloys is that, despite being the hardest & strongest of SS alloys, they are not designed for high temperature environments. I can't find the property sheet specific ...
by ECCO Machine
Mon Dec 30, 2019 3:13 pm
Forum: Silencersmithing Forum
Topic: Sourcing 60 degree cones
Replies: 7
Views: 802

Re: Sourcing 60 degree cones

1hank1 wrote:
Mon Dec 30, 2019 2:04 pm
ECCO Machine wrote:
Mon Dec 30, 2019 11:37 am
If you're trying to make a filter, sure. Converted into suppressor baffles? Hard pass.
Just out of curiosity, what makes them not a good option? Is it the design or material or both?
They're soft aluminum, they're really thick, and the angle is too obtuse.
by ECCO Machine
Mon Dec 30, 2019 11:37 am
Forum: Silencersmithing Forum
Topic: Sourcing 60 degree cones
Replies: 7
Views: 802

Re: Sourcing 60 degree cones

1hank1 wrote:
Mon Dec 30, 2019 11:10 am
Are these worth considering?
https://oldphatvet.com/products?olsPage ... minum-cups
If you're trying to make a filter, sure. Converted into suppressor baffles? Hard pass.
by ECCO Machine
Sun Dec 29, 2019 9:49 pm
Forum: Silencer Talk
Topic: Tirant 45 blew apart
Replies: 2
Views: 547

Re: Tirant 45 blew apart

YugoRPK wrote:
Sat Dec 28, 2019 5:28 pm
What do you think? Heading back to AAC for an evaluation?
Yep. That's what warranties are for, and I'm sure AAC will get you squared away. Probably out-of-spec threads
by ECCO Machine
Sat Dec 28, 2019 11:55 am
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

What is the general consensus on clipping blast baffles? I've read a ton of conflicting opinions on whether it should be done or not.. This is going on a long range rifle, so accuracy is of high priority. Is there any specific dimensions that seem to perform better than others for clips? Also, does...
by ECCO Machine
Sat Dec 28, 2019 11:52 am
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

The griffin taper attachment system is easy to machine on your own. You can make your own brakes, buy them from griffin, or a mix of the two. On that note, the print that is often posted for those is wrong. The 1"-20 threads are correct, but that's it. The correct included taper is 16°, and the thr...
by ECCO Machine
Fri Dec 27, 2019 4:45 pm
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

I am hoping to stick with 1.5" x 8" at this point. I am a little concerned about the tubing wall thickness around the threaded section of the tube.. If I thread it to 1.4375-24 there is only going to be about .030" of Wall thickness remaining, which is pretty thin for the amount of pressure I'm fig...
by ECCO Machine
Fri Dec 27, 2019 12:21 pm
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

bna5017 wrote:
Fri Dec 27, 2019 8:13 am
Thanks guys. I've changed the tube to .054" wall grade 9 titanium. Anything jump out at you as far as the general design goes that you think I should be concerned about?
Since you're making all your own parts, a couple things do, but first:

What length and diameter did you settle on?
by ECCO Machine
Fri Dec 27, 2019 12:08 am
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

I was not planning on it, I have a call in with a material supplier who is working on a quote for 17-4 tubing for me. I would rather use titanium, but had not come across a decent source yet. That looks like a good place to start! Thank you! They're gonna come back with a price you won't want to pa...
by ECCO Machine
Wed Dec 25, 2019 2:44 am
Forum: Silencersmithing Forum
Topic: First form 1 build, critique my plans please
Replies: 29
Views: 1585

Re: First form 1 build, critique my plans please

You're going to want something a bit bigger, especially for 300WM. It'll be best suited closer to 1.75x10. 1.5 x 8" can be made to work pretty well on cartridges in that class. But it's not going to be forgiving, so a new F1 builder really should opt for a bit more volume to compensate for not havi...
by ECCO Machine
Mon Dec 23, 2019 11:17 am
Forum: Silencersmithing Forum
Topic: Movie quiet
Replies: 11
Views: 906

Re: Movie quiet

With a good can, some hosts will get you there. .22 LR is obviously the easiest, can realize sub-110 dB with a manual action integral. I have one that meters 104.9 avg. with AE subsonic. 300 blk in a manual action can also be ridiculously quiet, but since most people are running an AR, they'll never...
by ECCO Machine
Sun Dec 22, 2019 12:21 pm
Forum: Silencersmithing Forum
Topic: Stepped Baffles versus Cones
Replies: 11
Views: 778

Re: Stepped Baffles versus Cones

Addendum: I upgraded my QCTP set to OXA* from AXA. They are steel and not Aluminum. Put latter on back-up NOS Atlas 618 I assembled. * <<https://littlemachineshop.com/products/product_view.php?ProductID=4058&category= >> I've never seen an aluminum AXA post. Are you thinking of those really small o...
by ECCO Machine
Fri Dec 20, 2019 8:39 pm
Forum: Silencersmithing Forum
Topic: Stepped Baffles versus Cones
Replies: 11
Views: 778

Re: Stepped Baffles versus Cones

When I look at my lovable 'door-stop' Atlas 618 lathe and imagining your +5 Sigma lathe I use the piss out of my little 618 for secondary ops. Finish boring on baffles & caps, filing/sanding/polishing, thread filing, chamfering, other things that are too laborious or not as well suited to the big m...
by ECCO Machine
Fri Dec 20, 2019 1:05 pm
Forum: Silencersmithing Forum
Topic: 17-7 tube anyone tried?
Replies: 2
Views: 249

Re: 17-7 tube anyone tried?

The problem with it seems to be A) finding it for sale in smaller quantities and B) finding it with appropriate wall thicknesses. I only see it with 1/8 wall and thicker, so unless you're trying to build a 20mm suppressor, that's gonna be an overbuilt pig of a tube without a lot of time spent boring...
by ECCO Machine
Thu Dec 19, 2019 10:04 pm
Forum: Silencersmithing Forum
Topic: Stepped Baffles versus Cones
Replies: 11
Views: 778

Re: Stepped Baffles versus Cones

I use them in some models & builds. Not exclusively, though, because: First WAG would be that extra turbulence induced should ... a weighted 'should' .... cause a measurable sound reduction. It's more complicated than that. If they worked better than smooth baffles across the board, everyone would u...
by ECCO Machine
Mon Dec 09, 2019 12:11 am
Forum: Silencersmithing Forum
Topic: Cone and Spacer Material: Beware of False Advertising
Replies: 27
Views: 2252

Re: Cone and Spacer Material: Beware of False Advertising

Is there any chance that the cones are made from 303 Stainless? Purchased two 60 degree cones, one 2” spacer and one 1” spacer from a well known vendor. The cones and spacers were advertised as 17-4 PH. When I received the cones and spacers, they appeared to be 300 SS. Out of curiosity, I tested th...
by ECCO Machine
Sat Dec 07, 2019 11:07 am
Forum: Silencersmithing Forum
Topic: Cone and Spacer Material: Beware of False Advertising
Replies: 27
Views: 2252

Re: Cone and Spacer Material: Beware of False Advertising

There are several materials that would serve great for suppressor baffles , but it seems to me that the industry has generally settled on reasonable compromises. The commercial market is very cost competitive and very, very few of us run 10 inch .233 ARs on full auto. Thus, for typical Form 1 build...
by ECCO Machine
Fri Dec 06, 2019 1:10 pm
Forum: Silencersmithing Forum
Topic: Turbocharger baffles
Replies: 25
Views: 1518

Re: Turbocharger baffles

It would be helpful if you post a link so everyone knows what you're looking at.

Regardless, I'm confident you'll be happier with the performance of conical baffles.
by ECCO Machine
Fri Dec 06, 2019 12:51 pm
Forum: Silencersmithing Forum
Topic: Turbocharger baffles
Replies: 25
Views: 1518

Re: Turbocharger baffles

Yep, and it's been done to varying degrees by a number of outfits over the years. Doesn't work as well as conventional baffle designs. Supersonic gasses don't behave like you see in typical fluid dynamics.
by ECCO Machine
Fri Dec 06, 2019 12:23 pm
Forum: Silencersmithing Forum
Topic: Cone and Spacer Material: Beware of False Advertising
Replies: 27
Views: 2252

Re: Cone and Spacer Material: Beware of False Advertising

Rich V wrote:
Fri Dec 06, 2019 10:45 am

I have the solution you seek. 300c maraging steel.
Too bad the stuff is so damn expensive.
422 has mechanical properties just barely below 300c with better corrosion resistance and lower material cost. That's why I use it. 422 is stronger at 900°F than 17-4 H900 at room temp.
by ECCO Machine
Fri Dec 06, 2019 10:14 am
Forum: Silencersmithing Forum
Topic: Cone and Spacer Material: Beware of False Advertising
Replies: 27
Views: 2252

Re: Cone and Spacer Material: Beware of False Advertising

The thing I'd be most curious to learn is the why. It's not like 17-4 is hard to come by or expensive. My cost on 17-4 round bar is about the same as most 300 and 400 series alloys. I'd also much rather machine 17-4 than 304. I do often use 304 or 316 tube for longer blast chamber spacers to keep co...
by ECCO Machine
Thu Dec 05, 2019 11:06 pm
Forum: Silencersmithing Forum
Topic: Cone and Spacer Material: Beware of False Advertising
Replies: 27
Views: 2252

Re: Cone and Spacer Material: Beware of False Advertising

That sucks, but I've seen it before. I've had a number of cones sent to me for clipping, and in more than one case they were some flavor of 300 series (I don't have XRF to further narrow it).
by ECCO Machine
Thu Dec 05, 2019 3:18 pm
Forum: Silencersmithing Forum
Topic: Machining 416
Replies: 3
Views: 352

Re: Machining 416

416 machines easily, but not very cleanly if you don't use very sharp cutters. Gear oil will further aid in machining and tool life. The stuff is soft in the annealed state and highly magnetic, so when you go to do your surface finish, be conscious of the fact that small chips will stick to the work...
by ECCO Machine
Tue Dec 03, 2019 12:28 pm
Forum: Silencersmithing Forum
Topic: First form 1 done... finnaly
Replies: 14
Views: 1995

Re: First form 1 done... finnaly

Double tap
by ECCO Machine
Tue Dec 03, 2019 12:19 pm
Forum: Silencersmithing Forum
Topic: First form 1 done... finnaly
Replies: 14
Views: 1995

Re: First form 1 done... finnaly

One of the pics shows the tube k baffels and adaptor and yes there is a 12 degree taper included in the part above the threads I know because i put it there Where? Though it's difficult to guesstimate accurately from a photo, especially one representing the part at an angle, I see included angles o...