Search found 608 matches

by ECCO Machine
Sat Nov 09, 2019 1:00 pm
Forum: Silencersmithing Forum
Topic: Need help on a .30 cal build
Replies: 8
Views: 1460

Re: Need help on a .30 cal build

Mopar wrote:
Sat Nov 09, 2019 12:28 pm
thank you for the reply very nice work, how deep is the Clip cut ?
3/16" width, .230" deep on the blast baffle, .215" on the second, .200" on the rest. Blast baffle cone is .065" thick, # 2 is .055", the other 7 are .045"
by ECCO Machine
Sat Nov 09, 2019 12:13 pm
Forum: Silencersmithing Forum
Topic: Need help on a .30 cal build
Replies: 8
Views: 1460

Re: Need help on a .30 cal build

For a 1.5" OD ~8" .30 can for supersonic use, I do single clipped 50° conical baffles with progressive spacing, skirts going .75, .65, .55, .5, .45, .425, .4, .35, ~.2. Muzzle brake mounts are better than direct thread for most applications. This is one I did yesterday. The owner is using a Griffin ...
by ECCO Machine
Wed Nov 06, 2019 5:46 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1531

Re: Help threading barrel

So, what are my options then? Edited to add: I don't have a spider on the outboard of the lathe. Should I make one for it? It currently has an attachment for the collet closer. That would be the simplest and best solution. Pretty easy to make, and keeps your work close to the chuck, minimizing chat...
by ECCO Machine
Wed Nov 06, 2019 12:35 am
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1531

Re: Help threading barrel

would pulling the barrel and threading between centers be good enough? For a muzzle brake, sure. Not for a suppressor. You might get lucky and have the last inch of bore just happen to align well enough with the breech and muzzle, but I can tell you that most every rifle barrel I thread has well ov...
by ECCO Machine
Tue Nov 05, 2019 6:28 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1531

Re: Help threading barrel

rickiesrevenge wrote:
Tue Nov 05, 2019 5:52 pm
Sorry for trying to help the guy. Won't make that mistake again.

Aaron
Oh, don't get all indignant. Doesn't suit members of this board. It also doesn't suit this board for any member to keep their mouth shut when a suggestion is made that we know to be a less-than-good idea, ergo my last post.
by ECCO Machine
Tue Nov 05, 2019 3:46 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1531

Re: Help threading barrel

https://youtu.be/ErVOUVszFjY http://pacifictoolandgauge.com/lathe-jigs-kits/2137-3-in-1-chambering-fixture-jig-viper-international.html You make a jig like these to dial one in. How big is your spindle bore? Aaron Having your work that far out of the jaws unsupported is a recipe for disaster, espec...
by ECCO Machine
Tue Nov 05, 2019 1:12 pm
Forum: Silencersmithing Forum
Topic: Help threading barrel
Replies: 23
Views: 1531

Re: Help threading barrel

Sorry, I should have been more specific i guess. I've done threading, that's not an issue. What I need help with is making sure it's concentric with the bore. I dont have a spider, and the barrel will be too short to fit all the way through the headstock. Then don't do it if the plan is for running...
by ECCO Machine
Fri Nov 01, 2019 12:13 am
Forum: Silencersmithing Forum
Topic: Inconel supplier
Replies: 8
Views: 2679

Re: Inconel supplier

Where does one buy heat treated 17-4? I've thought about building an oven for a while now. Aaron H1150 is available all over, and you can get all the other tempers from a few people. I don't recall whom because i heat treat my materials in-house, but it's been discussed here. Hopefully those guys w...
by ECCO Machine
Thu Oct 31, 2019 11:31 pm
Forum: Silencersmithing Forum
Topic: Inconel supplier
Replies: 8
Views: 2679

Re: Inconel supplier

Annealed Inconel 718 has lower tensile strength and hardness than annealed 17-4. And it's a whole lot more expensive. Inconel is also a bastard to work with, and unless you can heat treat yourself or don't mind paying $100+ to have it done, you're better off buying and using pre-treated 17-4. Anothe...
by ECCO Machine
Mon Oct 28, 2019 9:07 pm
Forum: Silencersmithing Forum
Topic: Anyone experiment making high and low pressure in cans?
Replies: 19
Views: 2720

Re: Anyone experiment making high and low pressure in cans?

i didnt ask the last time u shared these but im curious about the inner and outer diameters of the inner and outer tubes.. approximate is fine if u dont remeber. so cool The 9mm was a 1.75" OD .054" wall with 1.25" .035" wall inner tube. The 6" rimfire can is a 1.512" OD that was .080" wall, but I ...
by ECCO Machine
Sat Oct 26, 2019 12:58 pm
Forum: Silencersmithing Forum
Topic: #baffles and low/high pitch suppression designs?
Replies: 7
Views: 1503

Re: #baffles and low/high pitch suppression designs?

Don't suppose I can get your commentary / opinion on your designs with more and less baffles? 1. How do YOU like the sounds of low vs high pitch? 2. Do more or less baffles produce more or less blowback? 3. Failure to cycle or other failure/issues associated with more or less baffles? Thanks in adv...
by ECCO Machine
Sat Oct 26, 2019 10:14 am
Forum: Silencersmithing Forum
Topic: #baffles and low/high pitch suppression designs?
Replies: 7
Views: 1503

Re: #baffles and low/high pitch suppression designs?

Okay , so at what point is too many baffles... too many baffles? Is there and baffle spacing between baffles to diameter ratio that is "optimal"? There's no universal answer for your question, far too many variables. The number of baffles and optimal spacing depend on can diameter & length, baffle ...
by ECCO Machine
Thu Oct 24, 2019 3:34 pm
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

Matt in TN wrote:
Thu Oct 24, 2019 9:35 am
Clipping at all made no difference on rifles, or changing from the crescent clip like I used to your new clip?

7dB is HUGE!!!
7dB was the change going from crescent to double radiused.

Unclipped will suppress OK on a .22 rifle, horrible in any other application.
by ECCO Machine
Wed Oct 23, 2019 6:58 pm
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

ecco, have you tried clipping at different heights or depths--however you look at it? I mean one clip being 1/2 inch long from the face for instance an the other one being 3/8 of an inch long from the face just for example. I'm just curious if that would change anything? I know it would the pressur...
by ECCO Machine
Wed Oct 23, 2019 2:39 pm
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

I haven't heard from Curtis in the longest time hope he is well.I would still be surprised if a clip would yield 5 db but haven't the meter any longer to make measurements. While it made virtually no difference on rifles, I dropped 7 dB on Ocelot full size and 9 dB on Ocelot micro on handguns going...
by ECCO Machine
Tue Oct 22, 2019 11:37 pm
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

My bad - it was curtistactical: " I started with an all cone 30cal suppressor with no clips and 8 cone baffles, next I put the radius scoop in, lastly I cut them .125" deep to center of the bore. I tested this using 308 200gr subs and 308 175gr supers. With both loads the .125" to cl cut was around...
by ECCO Machine
Tue Oct 22, 2019 9:08 pm
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

Dangit, man! And then CaptLink (I think?) said he tested these clips against u-shaped clips and found that these were 5dB quieter, and both were significantly quieter than no clips (going off memory here). There's never just one answer! No, there's not. Lol. But I've played with a lot of different ...
by ECCO Machine
Tue Oct 22, 2019 11:10 am
Forum: Silencersmithing Forum
Topic: 30 Cal Form 1 Project
Replies: 27
Views: 3031

Re: 30 Cal Form 1 Project

Looks good. Hope the crescent clips work out for you, I did not have good luck with them in subsonic or supersonic applications across multiple calibers.

I would strongly recommend heat treating your parts, especially the 416 bits. In the annealed state, 416 is softer & weaker than 304.
by ECCO Machine
Sat Oct 19, 2019 12:14 pm
Forum: Silencer Talk
Topic: Help! Why are my 9mm always louder than my 300blk???
Replies: 4
Views: 1292

Re: Help! Why are my 9mm always louder than my 300blk???

You need to run subsonic ammo, and in the case of blowback carbines, the port pop may continue to be offensive no matter what ammo or suppressor is used. The AR9 you should be able to tune for reduced port noise, but expect the Scorpion to always snap your ears.
by ECCO Machine
Sat Oct 19, 2019 12:12 pm
Forum: Silencer Talk
Topic: Schematics/Spec Sheet with Measurements Needed
Replies: 2
Views: 827

Re: Schematics/Spec Sheet with Measurements Needed

You should design & build a few F1 suppressors before you sign over your inheritance on manufacturing them :D The Silencersmithing Forum is where you can learn more about building a F1 item plus some on past and current design. enjoy ! This. I will be running simulations on gas flow No flow modelin...
by ECCO Machine
Thu Oct 17, 2019 12:48 am
Forum: Silencersmithing Forum
Topic: Anyone experiment making high and low pressure in cans?
Replies: 19
Views: 2720

Re: Anyone experiment making high and low pressure in cans?

K baffles and Omega baffles both do what you're talking about with high and low pressure areas, but with limited effectiveness; I've achieved better suppression with conical baffles, including SPL reduction in production cans originally using Ks and Omegas like the SWR Trident and AAC Evolution. A b...
by ECCO Machine
Mon Sep 30, 2019 7:34 am
Forum: Silencer Talk
Topic: Suppressor Baffle Bullet hole size
Replies: 1
Views: 1273

Re: Suppressor Baffle Bullet hole size

Generally .040"-.060" over bullet diameter. Some intended more for use on gas operated guns may be overbored to reduce backpressure
by ECCO Machine
Sat Sep 28, 2019 12:56 am
Forum: Silencersmithing Forum
Topic: Group buy 60* cones
Replies: 7
Views: 2250

Re: Group buy 60* cones

FRANKIEBOOMS wrote:
Fri Sep 27, 2019 11:41 pm
Sorry new to this, but how many baffles would fit in an 8 inch tube, these seem to be exactly what I am looking for?
Depends on what you're trying to suppress. 9mm or 300 Blk subsonic, 12+. .308 Supersonic, go with 9. 5.56? Do a shorter tube with 5 or 6.
by ECCO Machine
Fri Sep 27, 2019 11:35 pm
Forum: Silencer Talk
Topic: Suppressor on Ruger PC9 Carbine?
Replies: 11
Views: 6275

Re: Suppressor on Ruger PC9 Carbine?

That's the nice thing about AR based carbines; can add lots of mass to retard bolt opening. I haven't tried anything else through it yet and probably won't, as this stuff cycles so well and delivers excellent accuracy. Try Fiocchi 158 gr. It's a little more expensive than the cheap 147 gr. stuff, bu...
by ECCO Machine
Fri Sep 27, 2019 9:50 pm
Forum: Silencer Talk
Topic: Suppressor on Ruger PC9 Carbine?
Replies: 11
Views: 6275

Re: Suppressor on Ruger PC9 Carbine?

Hi ECCO. Sounds like you've tested holding the bolt closed, if you're saying it hurts. So I'm wondering if you have a guess as to how much metal might be needed to assure reliable, durable bolt restraint, as an add-on for a 9mm PCC. Have a different model of 9mm takedown carbine and more specifical...