Search found 55 matches
- Mon Jan 29, 2018 12:16 am
- Forum: Silencersmithing Forum
- Topic: materials
- Replies: 27
- Views: 7197
Re: materials
I prefer 17-4, easy to machine and one step heat treating. Titanium or chrome moly tubing.
- Fri Nov 17, 2017 8:48 pm
- Forum: Silencersmithing Forum
- Topic: More baffles and volume vs better baffle shape
- Replies: 16
- Views: 6535
Re: More baffles and volume vs better baffle shape
The only way to know if you damaged them is to test the hardness.
- Thu Nov 16, 2017 11:59 pm
- Forum: Silencersmithing Forum
- Topic: More baffles and volume vs better baffle shape
- Replies: 16
- Views: 6535
Re: More baffles and volume vs better baffle shape
Heating a metal to about x temperature for a while really does nothing you can rely on. And 17-4 is NOT water quenching material. You need to control temperatures to plus or minus 15 to 25 degrees for heat treating for the specified amount of time.
- Thu Nov 16, 2017 12:20 am
- Forum: Silencersmithing Forum
- Topic: order of operations 60* cones?
- Replies: 22
- Views: 6844
Re: order of operations 60* cones?
This is how I have done it. Drill .02-.03 undersize. Rough bore id of cone. Finish bore id of cone and bore. Rough and finish od of cone. Part off cone. The advantage of doing it this way is everything is done in one set up, guaranteeing that concentricity is maintained. Every set up you make adds t...
- Thu Nov 16, 2017 12:08 am
- Forum: Silencersmithing Forum
- Topic: 422 SS for Baffles?
- Replies: 12
- Views: 3382
Re: 422 SS for Baffles?
422 is nice to machine. Hit your speeds and feeds and go to town.
- Tue Nov 14, 2017 10:55 pm
- Forum: Silencersmithing Forum
- Topic: 422 SS for Baffles?
- Replies: 12
- Views: 3382
Re: 422 SS for Baffles?
I used to make turbine bolts for power plants out of 422. I would use 316 out of what you mentioned because or corrosion resistance. If strength is more important then use 422. My go to is 17-4 because I can heat treat into the 40's Rc and make it thinner.
- Fri Oct 06, 2017 11:29 pm
- Forum: Silencersmithing Forum
- Topic: 5.56mm Sealed Can Build - Ongoing - UPDATE 10/6/2017
- Replies: 53
- Views: 34102
Re: 5.56mm Sealed Can Build - Ongoing - UPDATE 10/6/2017
Where did you get your welding rod, and is it 630?
- Tue Sep 12, 2017 10:56 pm
- Forum: Silencersmithing Forum
- Topic: Steps, inside and outside, or just outside?
- Replies: 2
- Views: 1404
Steps, inside and outside, or just outside?
I recently saw a picture of a stepped cone baffle and the inside was smooth. I had always assumed the inside was done in matching steps, is this not the normal configuration?
- Tue Aug 15, 2017 6:59 pm
- Forum: Silencersmithing Forum
- Topic: Drilling Misshap
- Replies: 62
- Views: 20272
Re: Drilling Misshap
The Machinery's Handbook shows 50 sfm down to 20 sfm depending on hardness. I have used carbide end mills in lathes to get past hard spots in parts. It only works if your setup is extremely rigid. Drill presses and end mills are not compatible in my opinion. Moly D is great stuff for SS, however it ...
- Mon Aug 14, 2017 11:13 pm
- Forum: Silencersmithing Forum
- Topic: Drilling Misshap
- Replies: 62
- Views: 20272
Re: Drilling Misshap
Also, get some real cutting oil not wd40. What is the material? As stated if it is 300 series stainless it is now work hardened. Get some135 degree split point cobalt drill bits. As Yondering suggested go up in steps. If you search surface feet per minute for your material, you can plug that number ...
- Fri Jun 30, 2017 7:59 pm
- Forum: Silencersmithing Forum
- Topic: Second form 1 .22 overkill
- Replies: 5
- Views: 2291
Second form 1 .22 overkill
Some recent discussion on secondary baffles/chambers caused me to rethink my design before I started. I was reminded of how I used to make pistol compensators. I sized the chambers so the shoulder of the bullet would reach the next baffle as the base cleared the last baffle. In theory this did not a...
- Wed Jun 21, 2017 10:23 pm
- Forum: Silencersmithing Forum
- Topic: Secondary Blast Baffle discussion
- Replies: 59
- Views: 14023
Re: Secondary Blast Baffle discussion
I am making my baffles .312 apart, which means there will be about 12-14 in the suppressor. I measured the length of the body diameter on the bullets I plan to shoot. The .22 LR's run around .28" to .29". My cast bullets run from .3" to .375". And 55 grain fmj run about .4"....
- Wed Jun 21, 2017 1:08 am
- Forum: Silencersmithing Forum
- Topic: Secondary Blast Baffle discussion
- Replies: 59
- Views: 14023
Re: Secondary Blast Baffle discussion
The more I reflect on this here are my thoughts. The blast chamber has an inverse relationship between FRP and back pressure (applicable only to semi-autos). Volume helps, but at what point do you see diminishing returns? Baffle spacing, that seems to be the real conundrum. Wider spacing, in the mid...
- Mon Jun 19, 2017 1:57 am
- Forum: Silencersmithing Forum
- Topic: My first form 1 build 30 cal
- Replies: 21
- Views: 4188
Re: My first form 1 build 30 cal
When I machined my cones I did it entirely before parting it off. Then I had a finished product at that point aside from any clipping that may take place. Kind of like this □<. They were 60* cones with an integral skirt. Food for thought.
- Mon Jun 19, 2017 1:45 am
- Forum: Silencersmithing Forum
- Topic: Secondary Blast Baffle discussion
- Replies: 59
- Views: 14023
Re: Secondary Blast Baffle discussion
I think it was Speer's 13th edition loading manual that had a very nice picture of gasses surrounding a bullet a short distance from the muzzle. This picture along with others I have seen influenced the way I made pistol compensators over twenty years ago. The base of the bullet does impead the flow...
- Sun Jun 18, 2017 12:28 am
- Forum: Silencersmithing Forum
- Topic: Secondary Blast Baffle discussion
- Replies: 59
- Views: 14023
Re: Secondary Blast Baffle discussion
I'll throw a few more questions out. I made my blast chamber walls .050" thick with 17-4. My spacers and cones are one piece with spacer walls at .020" thick. Couple this with .065" wall ti tubing. Could this be why the blast chambers don't show the heat as much as later in the stack?...
- Tue May 23, 2017 11:11 pm
- Forum: Silencersmithing Forum
- Topic: For Younger Members Starting Out Post-HPA Home-Brews
- Replies: 2
- Views: 2374
Re: For Younger Members Starting Out Post-HPA Home-Brews
The problem with many today is they think you can buy experience. They are willing to spend great amounts of money on the latest, fill in the blank, yet reticent to spend the hours and even years to hone their skills. Buying a Stradivarius does not make you a virtuoso any more than buying a Bridgepo...
- Sat May 20, 2017 4:32 pm
- Forum: Silencersmithing Forum
- Topic: Finally done
- Replies: 10
- Views: 3447
Re: Finally done
Historian you are too kind. I have just learned more ways not to do things than most people. My lathe is a 13 inch Jet, and the mill is also a Jet benchtop knee mill. I used carbide tooling for turning and threading. To anyone hesitant to machine titanium or 17-4, don't be, it cuts easier than many ...
- Sat May 20, 2017 1:02 am
- Forum: Silencersmithing Forum
- Topic: Finally done
- Replies: 10
- Views: 3447
Re: Finally done
One more, all heat treated to 42.1 Rc.
- Sat May 20, 2017 12:59 am
- Forum: Silencersmithing Forum
- Topic: Finally done
- Replies: 10
- Views: 3447
Re: Finally done
The cones have not been clipped. The point of aim did not shift when it was installed, so I am hesitant to clip.
- Sat May 20, 2017 12:51 am
- Forum: Silencersmithing Forum
- Topic: Finally done
- Replies: 10
- Views: 3447
Re: Finally done
Thank you on the machine work. I've been machining for about 40 years now. All the machining was done with manual machines. If this is what you referenced I did the hex on a super spacer and the blends on the lathe. http://i328.photobucket.com/albums/l341/jnjproto1/20170503_113353_zpsmcnin9pt.jpg Th...
- Thu May 18, 2017 10:43 pm
- Forum: Silencersmithing Forum
- Topic: Finally done
- Replies: 10
- Views: 3447
Finally done
[img][URL=http://s328.photobucket.com/user/jnjproto1/media/20170504_174138_zps8cznhdsc.jpg.html][IMG]http://i328.photobucket.com/albums/l341/jnjproto1/20170504_174138_zps8cznhdsc.jpg[/img][/URL[/img] Finally done after many iterations and valuable input from other members on the board. Here are some...
- Thu May 18, 2017 8:33 pm
- Forum: Silencersmithing Forum
- Topic: Rear baffle face ???
- Replies: 3
- Views: 1800
Re: Rear baffle face ???
You are correct Canadian. I cut a small 30 degree angle leading into the 60 degree cone. The can displayed zero point of impact shift when I tested it last weekend. I dont think I will clip any cones, it shoots too good to risk any changes.
- Thu May 18, 2017 12:44 am
- Forum: Silencersmithing Forum
- Topic: Rear baffle face ???
- Replies: 3
- Views: 1800
Rear baffle face ???
http://i328.photobucket.com/albums/l341/jnjproto1/20170505_181921_zpshtnqq94i.jpg On the rear face of my blast baffle I have a flat that is about .100" wide. Would it increase the efficiency to cut an angle on the face of about 30deg and leave around a .020" flat? The baffles are 17-4 and ...
- Wed May 10, 2017 9:41 pm
- Forum: Silencersmithing Forum
- Topic: Heat treating, yes or no?
- Replies: 9
- Views: 3065
Re: Heat treating, yes or no?
I think I will try one baffle to start. Then check for warpage. I've always heard 17-4 is very stable in heat treating. All my baffles except the blast baffle are .050 on the cone and .020 for the skirt. I think the most I would do to heat it up would be 4 or 5 shots at a running coyote with the M-4.