Search found 501 matches

by ECCO Machine
Fri Aug 16, 2019 6:17 pm
Forum: Silencersmithing Forum
Topic: F1 30cal can on a 22LR
Replies: 9
Views: 457

Re: F1 30cal can on a 22LR

I wasn’t familiar with that can. Everything else I saw was mostly 7-9 baffles. I don’t want to sound doubtful on your suggestion, I’m just trying to figure out why only one company does it this way and the rest do it a bit different. I know cost is a huge factor, especially on production scale so I...
by ECCO Machine
Fri Aug 16, 2019 1:34 am
Forum: Silencersmithing Forum
Topic: F1 30cal can on a 22LR
Replies: 9
Views: 457

Re: F1 30cal can on a 22LR

Out of curiosity, does anyone commercially make a .22lr suppressor in ~0.9” ID, 5.5”-6” length, with 10-12 cones? Seems there are a few that match two of the three but I didn’t see anything that was all of the above made from a major manufacturer. Well, yeah https://i.imgur.com/TXWCe1o.jpg The TBAC...
by ECCO Machine
Fri Aug 16, 2019 1:04 am
Forum: Silencersmithing Forum
Topic: Suppressor can without tax stamp
Replies: 3
Views: 378

Re: Suppressor can without tax stamp

Can you buy the can without baffle stack without tax stamp? Reason being I would like to form one my own baffle design inside of a SureFire outer shell. Why not just buy a thick steel tube and wrap it with lead sheet if you want the feel of a SF can? Lol. Seriuosly, though, SF stuff is among the lo...
by ECCO Machine
Thu Aug 15, 2019 3:40 pm
Forum: Silencersmithing Forum
Topic: Baffles rattle in the tube?
Replies: 5
Views: 197

Re: Baffles rattle in the tube?

How about making the tube a tad shorter? This. Or shim it. Don't use springs, O-rings or other compressible items. Remember, not only are you dealing with high pressures, but that as the bullet passes through each aperture, the differential from back side to front will change, more than once. Basic...
by ECCO Machine
Thu Aug 15, 2019 2:12 am
Forum: NFA Weapons
Topic: Question Regarding Eform Form 2 for 07/02 FFL SOT
Replies: 2
Views: 213

Re: Question Regarding Eform Form 2 for 07/02 FFL SOT

It will always show "pending research" on any new model you submit for a few days. F2 gets filed when the weapon is "done", and not before. I have a chicom S&S with 10" barrels on it in the shop that's still not F2'd. I cut the damaged stock down to a pistol grip, and quickly discovered it's simply ...
by ECCO Machine
Thu Aug 15, 2019 2:01 am
Forum: Silencer Talk
Topic: Subsonic Ammo for B&T GHM45/APC45
Replies: 3
Views: 192

Re: Subsonic Ammo for B&T GHM45/APC45

Why not just buy ball ammo like you find on the shelf at walmart or anywhere else? All standard pressure 230 gr loads will be sub, even from SBRs.
by ECCO Machine
Thu Aug 15, 2019 1:21 am
Forum: Silencersmithing Forum
Topic: Gemtech vs Sparrow vs Cone design?
Replies: 8
Views: 436

Re: Gemtech vs Sparrow vs Cone design?

guys!!! please do not leave the main topic \ question. Question was : 1) 5,56 2) three types of monocore design You asked for and received advice. If you don't want to listen to those of us with experience on the matter, why bother asking the question? Once again, none of those 3 designs, nor any o...
by ECCO Machine
Tue Aug 13, 2019 11:09 pm
Forum: Silencersmithing Forum
Topic: Gemtech vs Sparrow vs Cone design?
Replies: 8
Views: 436

Re: Gemtech vs Sparrow vs Cone design?

None. Monocores suck. They work ok on .22 rifles, that's about it. I spent a fair amount of time trying to "build a better mousetrap" experimenting with all kinds of monocore designs. There's a reason every one of my suppressor models have conical baffles.
by ECCO Machine
Wed Aug 07, 2019 3:34 am
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

gun410 wrote:
Mon Aug 05, 2019 11:44 am
if i'm thinking about this right won't i get the wrong hand thread (left hand) in this configuration?
As long as you're threading toward the spindle with the lathe running forward, you get right hand threads. If you thread away from the spindle running forward, you will cut LH threads.
by ECCO Machine
Tue Aug 06, 2019 8:20 pm
Forum: Silencersmithing Forum
Topic: F1 30cal can on a 22LR
Replies: 9
Views: 457

Re: F1 30cal can on a 22LR

Thanks for the insight. I’m just torn between building a 30cal to use on my Remmy as well as on a Ruger 10/22 or simply build a dedicated 22can and purchase a commercial 30cal can. Got an email confirmation from the Feds this morning so it shouldn’t be long now. Thanks again Build both. The can you...
by ECCO Machine
Fri Aug 02, 2019 11:35 am
Forum: Silencersmithing Forum
Topic: New cat on the block.....
Replies: 9
Views: 397

Re: New cat on the block.....

Certainly. 1.5" x 8"-9" is pretty much the sweet spot for a .30 rifle can. My two production .30 models are Valkyrie (1.5" x 8") and Furtivus (1.5" x 9"). You'll find that most other manufacturers have one or more .30 model in that size range.
by ECCO Machine
Thu Aug 01, 2019 5:57 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I guess I’ll just knock down my 11ir inserts. But the 2mm growing tool I posted above wont even get Low enough to be centered (not even close). So I know my 3mm one coming won’t work either, what can I do? Move your tool post over so the holder can drop down past the compound. Also what class threa...
by ECCO Machine
Wed Jul 31, 2019 9:14 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

What inserts do u buy for threading that have a radius and not a sharp v? There are pitch specific inserts for both external (NTCR24E, for example, is for cutting 24 pitch right hand external threads) and internal (16IR24 would be a 24 pitch laydown insert). I don't generally bother with pitch spec...
by ECCO Machine
Wed Jul 31, 2019 5:28 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I was looking around the lathe and i found this carbide parting tool. It is a different style than yours but there can't be too big of a difference? Same style, but that's a holder for MGMN200, which are 2mm wide. 200s are a little light, and the -2 holders don't have as much reach for parting larg...
by ECCO Machine
Wed Jul 31, 2019 1:29 am
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I forgot to change the change gears back to turning as they were setup for threading, but i got that fixed and the 17-4 turns beautifully now. One problem i'm having is my hss parting tool is not cutting the 17-4 and i've tried lowering and raising it and still ain't cutting at all. The only reason...
by ECCO Machine
Sun Jul 28, 2019 9:08 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I checked my compound and 0° is parrel so basically you subtract half the included angle from 90°to get compound angle? On most compound scales, yes, since they'd read 90° when travelling parallel to Z axis. But if your compound travels on Z axis when the scale is set to 0°, then you'll set it at 6...
by ECCO Machine
Sun Jul 28, 2019 1:47 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

What do you mean 12 degree included taper? What part of the brake is at 12 degree? I'm taking about a shoulder coming after the threads such as the one practical renaissance did on his 30 cal can. He set his compound at 20 degree but not sure what the actual angle in relation to the part would be. ...
by ECCO Machine
Sat Jul 27, 2019 11:19 am
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

Alright you convinced me to go with 1.375 24tpi, i have a belt sander ill try to use but not sure on how much to take off the v of the carbide insert Not very much. Think dremel. This calculator will tell you how much truncation & radius if you plug in the pitch & thread class. http://theoreticalma...
by ECCO Machine
Sat Jul 27, 2019 12:29 am
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

Why 24tpi instead of 28tpi i want the tube to be thicker. I use carbide inserts for threading but they are a sharp v. Inserts are cheap; grind the tips to make a 24 pitch depth & radius. I usually try to match the single thread depth to the remaining wall thickness at root/undercut. So: For .030" w...
by ECCO Machine
Fri Jul 26, 2019 9:05 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I have found SD Tactical's tubes and they are using the exact same tube ( Gr9 Ti 1.5"OD 1.36" ID) and they are threading it 7/16 -20 so 7/16 -28 should work with it being a shallower thread but i would rather do the custom thread that way i don't have to bore it and remove material weakening it. ht...
by ECCO Machine
Fri Jul 26, 2019 8:58 pm
Forum: Silencersmithing Forum
Topic: 300 Black Out Welded Can
Replies: 35
Views: 1903

Re: 300 Black Out Welded Can

I've seen some things about pre heating 17-4. I'm assuming that is not needed? While it is with most hardenable alloys, it really isn't with 17-4. https://app.aws.org/forum/topic_show.pl?tid=2526 It a really stable alloy, not at all prone to cracking like 400 series. 400 series need to be pre-heate...
by ECCO Machine
Fri Jul 26, 2019 12:21 pm
Forum: Silencersmithing Forum
Topic: 300 Black Out Welded Can
Replies: 35
Views: 1903

Re: 300 Black Out Welded Can

Now to figure out how I'm going to weld this. Going to try to turn a couple pieces from what 17-4 I have left and try to figure out what my settings need to be (I don't have pulse on my machine so I hope I can get away with it). If anyone has any tips on fusion welding 17-4 that would be great! 17-...
by ECCO Machine
Thu Jul 25, 2019 2:36 pm
Forum: Silencersmithing Forum
Topic: .223/5.56 Completed can- Build with pics
Replies: 3
Views: 691

Re: .223/5.56 Completed can- Build with pics

Yeah, I'm not going to use the 41xx steel again, only because of how it machine's. My understanding is that even annealed 41xx is stronger than the 300 series stainless that is fairly common in cans. ] They're pretty close. Annealed 4140 has a TYS of 60 KSI, 316L has a TYS of 55 KSI. 1018 is right ...
by ECCO Machine
Wed Jul 24, 2019 4:54 pm
Forum: Silencersmithing Forum
Topic: .223/5.56 Completed can- Build with pics
Replies: 3
Views: 691

Re: .223/5.56 Completed can- Build with pics

As you've discovered, annealed 4140 is nasty, gummy stuff. With super sharp cutters and lots of cutting fluid, you can minimize the roughness, but I usually hard turn for final dimensions, since the parts will change significantly when you heat treat anyway. You can actually get a really nice finish...
by ECCO Machine
Wed Jul 24, 2019 2:56 pm
Forum: Silencersmithing Forum
Topic: 30 cal Suppressor Build - Forum 1
Replies: 63
Views: 2429

Re: 30 cal Suppressor Build - Forum 1

I still gotta fix my stand situation, my 10x22 lathe is sitting on a wood top tool cabinet with roller wheels 100% not level. Probably will want to fix that before the suppressor right? Definitely. Leveled well, and the more rigid, the better. But what about these baffles, 60 degree inside and outs...