Search found 757 matches

by CMV
Sat Nov 12, 2016 1:00 pm
Forum: Silencersmithing Forum
Topic: 60 degree cone baffles.
Replies: 6
Views: 3718

Re: 60 degree cone baffles.

If you're cutting the cones on a lathe you really don't want to do it this way. Leave the compound angle once set (just leave at 29.5° if that's where it is) alone & then you can't make the outside and inside cuts at different angles. Doing the inside as you describe and then cutting the outside...
by CMV
Sat Nov 12, 2016 12:49 pm
Forum: Silencersmithing Forum
Topic: Clipped Cone Question
Replies: 2
Views: 1168

Re: Clipped Cone Question

The gas wants to 'follow' the angled wall of the cone. That little clipped section is enough to redirect a little bit from the other side of the wall and make it not want to 'follow' the wall so adds some turbulence. If you're talking about a typical plain old cone, just the clip at the mouth end is...
by CMV
Sat Oct 22, 2016 1:45 pm
Forum: Silencersmithing Forum
Topic: Member build question
Replies: 3
Views: 669

Re: Member build question

I have a fairly respectable little pile of form-1s sitting here. Some are built, some are for projects I plan to get into ... eventually. But when efile times were blazing fast (relative) and seeing how easy it was to submit after getting thru the first one, I amassed a bunch. Having said that, no o...
by CMV
Sat Oct 22, 2016 1:29 pm
Forum: Silencersmithing Forum
Topic: How much more can I expect from this? (300 BO)
Replies: 23
Views: 2874

Re: How much more can I expect from this? (300 BO)

I just finished my first attempt at a suppressor for 300 Blackout. (1.5" x 14" with baffles approximately every 3/4"). It is performing at the level of 14dB suppression. I was hoping for more. My baffles are open to 0.330". Is this too big? 0.330" for .308" projectile ...
by CMV
Fri Aug 26, 2016 8:15 pm
Forum: Silencersmithing Forum
Topic: Whats your go to measuring tool brand
Replies: 5
Views: 1268

Re: Whats your go to measuring tool brand

Harbor Freight. Because I'm a cheapskate :) In all seriousness, their $10 digital caliper and digital mic are really nice tools for the $. I have one just down the road, so I buy 10 at a time, test them out for smoothness, accuracy, and repeatability, and then keep the few best from that lot. I'm no...
by CMV
Wed Jul 27, 2016 5:03 pm
Forum: Silencersmithing Forum
Topic: Lathe purchase
Replies: 13
Views: 2318

Re: Lathe purchase

think that would be a mistake, based on my own experience. You give up a lot of capability with smaller lighter machines, and you should be able to find something lightly used for half the cost or less, on a bigger machine. G4003G isn't a small machine. Small enough you can fit it into your home sh...
by CMV
Sat Jul 23, 2016 2:09 pm
Forum: Silencersmithing Forum
Topic: Lathe purchase
Replies: 13
Views: 2318

Re: Lathe purchase

Threading rifle or pistol barrels? If rifle barrels, always separate from action? For your suppressor projects you really just need to decide how much dicking around with complex setups you want to do. You can mostly do everything on a benchtop or mini machine but will have to work around the small ...
by CMV
Wed Jul 13, 2016 8:06 pm
Forum: Silencersmithing Forum
Topic: Material Question
Replies: 2
Views: 460

Re: Material Question

Yes. If you scrap a part in process destroy it & make another. The issue is when you're done but not happy with the end result performance you are then stuck with it. You can keep tweaking what you already made, but just scrapping completed parts for a 'do over' isn't legal for a F1 builder. The...
by CMV
Tue Jul 12, 2016 4:59 pm
Forum: Silencersmithing Forum
Topic: 30 cal can - all you need to make one
Replies: 46
Views: 49747

Re: 30 cal can - all you need to make one

A 1.5" tube, 0.058 wall with 20 TPI (assuming a 1.44-20 thread form) leaves you with less than 0.030 wall thickness at the relief or root of the thread. Is this adequate for 308, especially at elevated temperature? My thread calcs may be off, I am just using the sherline thread calculator spre...
by CMV
Mon Jul 11, 2016 3:50 pm
Forum: Silencersmithing Forum
Topic: 30 cal can - all you need to make one
Replies: 46
Views: 49747

Re: 30 cal can - all you need to make one

What do you mean by 'lined up"? How do all the clipped potions stay facing the same direction? Or how do the cones stay centered in the tube? If you want the ports/clipped areas all facing a certain direction or pattern, you just build the stack that way on a table or counter - some solid flat ...
by CMV
Thu Jul 07, 2016 5:49 pm
Forum: Silencersmithing Forum
Topic: aluminum or thin chromoly?
Replies: 13
Views: 1509

Re: aluminum or thin chromoly?

Yes you will need flood coolant for Ti. You can make an inexpensive cooling system for under $50. Not elegant but will work. If you search my threads, you will find instructions on how I made mine. I tried to do a search for your post on making a flood coolant system but using CMV as a search strin...
by CMV
Tue Jul 05, 2016 6:11 pm
Forum: Silencersmithing Forum
Topic: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped
Replies: 6
Views: 1487

Re: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped

If you search Wicked's completed builds http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895 you can find my .308 build. It has dimensions for everything. I used .065" for the blast baffle & .050" for the remainder, 416 SS. There's a video in my thread comparing that build ...
by CMV
Tue Jul 05, 2016 5:48 pm
Forum: Silencersmithing Forum
Topic: aluminum or thin chromoly?
Replies: 13
Views: 1509

Re: aluminum or thin chromoly?

Yes you will need flood coolant for Ti. You can make an inexpensive cooling system for under $50. Not elegant but will work. If you search my threads, you will find instructions on how I made mine. Ask Enfield577 about service life of 9mm AL baffles - he makes a lot & can probably give you a goo...
by CMV
Tue Jul 05, 2016 5:26 pm
Forum: Silencersmithing Forum
Topic: Shrink fitting end caps
Replies: 13
Views: 2821

Re: Shrink fitting end caps

Do as described & then drill 13/64 or #6 holes and use 3/32 roll pins to secure the caps? I think you'd want to use a little thicker tube so you could undercut a square shoulder for your end cap to butt up against to make sure it's square when pressed in. Maybe that wouldn't matter - never done ...
by CMV
Mon Jul 04, 2016 6:22 pm
Forum: Silencersmithing Forum
Topic: Finished my first K baffle can
Replies: 5
Views: 3213

Re: Finished my first K baffle can

If it were mine I'd chop down that blast chamber & add another K. Can't really see from the pictures but the scoop on the face looks to be minimal/not there. From what i can see from those pics it looks like you just put a notch in the nose but not a scoop. Does yours look similar to this? http:...
by CMV
Mon Jul 04, 2016 1:42 pm
Forum: Silencersmithing Forum
Topic: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped
Replies: 6
Views: 1487

Re: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped

The tube can be as thick as you want it. If you are making female threads in the tube (or male outside of it I guess) you will need some meat behind those threads. How much meat - no idea what the absolute minimum is but I wouldn't go under .030" - so depending on your chosen thread depth + .03...
by CMV
Mon Jul 04, 2016 7:41 am
Forum: Silencersmithing Forum
Topic: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped
Replies: 6
Views: 1487

Re: Going to machine my first suppressor: Few questions Mono vs K-baffle/Sloped vs Stepped

Not gospel, but my recommendations: 1. I plan on running a Seekins MCSR v2 rail which has a 1.8 ID. should I plan on buying 1.75" stock and machining it down to like 1.65" or would that be too close to the rail and touch the free-float under barrel flex? I will be mounting about the first ...
by CMV
Tue Jun 21, 2016 9:04 pm
Forum: Silencersmithing Forum
Topic: Some k baffle questions
Replies: 12
Views: 9920

Re: Some k baffle questions

I can't say "I notice a difference" because I'd have to make two absolutely identical except that one feature and then compare. I just did it once because it looked like I could cut that channel deeper and still have a curved surface. That worked so I stuck with it. Whether that matters or...
by CMV
Mon Jun 20, 2016 6:03 pm
Forum: Silencersmithing Forum
Topic: Cleaning K-Baffles
Replies: 13
Views: 2198

Re: Cleaning K-Baffles

It doesn't' hurt cartridge brass which is also much softer than SS. The solution might be a problem - many people use the same solution for SS pin wet tumbling as you would for ultrasonic - a few drops of Dawn & LemiShine. Don't know how AL does in an acidic bath.
by CMV
Mon Jun 20, 2016 5:58 pm
Forum: Silencersmithing Forum
Topic: Some k baffle questions
Replies: 12
Views: 9920

Re: Some k baffle questions

I don't see why not. That's just the way I do it & leave the spot I do w/ the square endmill flat at the bottom of the cut.

But that pic shows how the tool in my 1st post can cut the face. Square to the bore & then a crescent-like channel
by CMV
Fri Jun 17, 2016 6:24 pm
Forum: Silencersmithing Forum
Topic: First form 1 can
Replies: 11
Views: 1832

Re: First form 1 can

If not threading the tube and just holding it in compression you can go with thinner walls. Totally different application, but my integral 10/22 tube is only .020" wall.
by CMV
Fri Jun 17, 2016 5:50 pm
Forum: Silencersmithing Forum
Topic: Some k baffle questions
Replies: 12
Views: 9920

Re: Some k baffle questions

A lot has to do with the angles you are using. If you look at different K baffles you will see the bottom/face machined differently. I have done them like this before & they work well - more like the one on the right using a tool ground as pictured. But I did 'clicky cones' for my 9mm & not ...
by CMV
Sat Jun 11, 2016 3:18 pm
Forum: Silencersmithing Forum
Topic: First form 1 can
Replies: 11
Views: 1832

Re: First form 1 can

Individuals can not make modular cans. Manufacturers can because they get permissions to do some from Tech Branch for commercial cans. Why could you NOT do this? One undersize K inside a sleeve. Remove that K leaving it's sleeve as a spacer. You could then switch from a small to large blast chamber...
by CMV
Sat Jun 04, 2016 7:09 pm
Forum: Silencersmithing Forum
Topic: Difference in sound for different material?
Replies: 11
Views: 2617

Re: Difference in sound for different material?

Cool. Will be an interesting experiment then comparing the two once his is finished. The intent is duplicate my can as closely as possible dimensionally so for my skill level that probably means ± .005 for most lengths and all diameters the same. Mine is gr 9 tube, gr 5 everything else. His will be ...
by CMV
Sat Jun 04, 2016 6:54 pm
Forum: Silencersmithing Forum
Topic: possible alternative end cap mounting
Replies: 35
Views: 2912

Re: possible alternative end cap mounting

Why would it need to be a thick aluminum tube for a subsonic 9mm can? The dimensions you're using for SS would be fine. Step it up to .065 wall if you're concerned about it. 147gr 9mm subs are same pressure as 115gr or 124gr standard loads. All standard load 147gr (& a lot of +P) are subsonic -...