Search found 59 matches

by calinb
Sun Sep 07, 2014 1:40 am
Forum: Silencersmithing Forum
Topic: QD idea I'm pondering...
Replies: 9
Views: 1069

Re: QD idea I'm pondering...

Well, that shows just how broken the patent office is these days. That most certainly fails the requirements of being "not obvious to one skilled in the art", as well as being "new and useful" as it is no different than the numerous other examples of ball lock systems from the ubiquitous air hose c...
by calinb
Fri Sep 05, 2014 8:37 pm
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 2467

Re: grade 5 drilling question

My lathe goes from 90rpm to 240 so I between is not an option untill I upgrade to a vfd. Working the problem "backwards" from 90 rpm and 15 SFM I get a 41/64" drill bit. 90 rpm yields 11.8 SFM with a 1/2" drill bit and it seems to me that would be close enough to work well too. The "Drilling" table...
by calinb
Fri Sep 05, 2014 8:08 pm
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 2467

Re: grade 5 drilling question

[ In my Google Drive I have a number of PDFs about a number of different manufacturing, gunsmithing, design stuff. One of them is Bill Webbs Rifling Machine Supplement. There's some information in there about a high pressure oil pump system for gun drilling that may or may not be helpful. Feel free...
by calinb
Fri Sep 05, 2014 5:38 pm
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 2467

Re: grade 5 drilling question

I keep thinking that a cheap $99 Harbor Freight electric pressure washer would make a useable pump for coolant fed tooling... I was thinking along those lines too--or maybe a small airless paint sprayer, which have pumps in the pressure range we'd need. However, I don't think the pump is the most d...
by calinb
Fri Sep 05, 2014 5:32 pm
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 2467

Re: grade 5 drilling question

I had no Issue but again was slow 115rpm and flood coolant and the inserts I used were uncoated. Yup--from what I've read, 115 rpm sounds about right for a 1/2" dia. hole using HSS/cobalt steel (15 SFM)! It's clear from reports on various forums that most people try to spin drill bits too fast in T...
by calinb
Fri Sep 05, 2014 3:08 pm
Forum: Silencersmithing Forum
Topic: grade 5 drilling question
Replies: 34
Views: 2467

Re: grade 5 drilling question

After discovering that I can easily face and turn grade 5 (I like the Arthur R. Warner T15 tooling), I have turned my attention to drilling grade 5, in order to enable boring. I have not yet drilled even a single chip, but I have spent many hours searching and reading several online forums and readi...
by calinb
Thu Sep 04, 2014 4:59 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Re: Multi duty can (243 WSSM can on a 22 cal.)?

If you don't deal with the high pressures and gas cutting issues related to the 243 wssm your work will be temporary.Try inconel for the first 3 baffles along with a brake and a long chamber. Inconel? Yikes! :cry: I remember Dr.K relating its challenges. I've machined some test pieces of the Ti and...
by calinb
Thu Sep 04, 2014 4:07 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Re: Multi duty can (243 WSSM can on a 22 cal.)?

What barrel length and what wall thickness on the tube do you intend to use? What grade material? My current 243 WSSM bolt action has a 22" barrel length, but I also have an AR-15 WSSM with a 22" barrel and a Krieger 243 AR barrel ready to chamber (28" light Palma). I'm planning to use the can prim...
by calinb
Thu Sep 04, 2014 2:23 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Re: Multi duty can (243 WSSM can on a 22 cal.)?

Make a jig to hold your cones after they're turned; set a ball mill at a given height, and make the same cut in all of them. My version of 'symmetrical' is that all the notches/clips/cuts are oriented the same when they're welded up. Once again, look at what is out there by the big names...they hav...
by calinb
Thu Sep 04, 2014 2:16 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Re: Multi duty can (243 WSSM can on a 22 cal.)?

Oh--I'm not planning to risk an accuracy degradaton by clipping the cones. This is a myth. Good to hear it's a myth. Thanks! I just read some claims here and kept thinking about how the condition of a barrel crown is generally regarded as important to accuracy and thought I'd forgo the clipping, bu...
by calinb
Wed Sep 03, 2014 10:02 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Re: Multi duty can (243 WSSM can on a 22 cal.)?

If max suppression is the goal, stuff as many baffles as possible in that tube. Clip them symmetrically, and adjust the zero as needed on your rifle. Thanks, MCKNBRD! By symmetric, are you recommending to just make sure the the "U" on each cone is symmetrically cut on that cone? Obviously, having o...
by calinb
Wed Sep 03, 2014 6:46 pm
Forum: Silencersmithing Forum
Topic: Multi duty can (243 WSSM can on a 22 cal.)?
Replies: 10
Views: 1149

Multi duty can (243 WSSM can on a 22 cal.)?

I'm designing an all-Ti can for a 243 bolt action hunting rifle (supersonic loads) using 60 degree cones. From what I've learned here, it doesn't take very many baffles to adequately get this job done, using a long blast chamber and perhaps tightening-up the spacing of the cones toward "business end...
by calinb
Tue Sep 02, 2014 5:04 am
Forum: Silencersmithing Forum
Topic: Ti-Thirty Form 1
Replies: 41
Views: 5657

Re: Ti-Thirty Form 1

john.t.little1 wrote:
Yeaaaa tried to keep as much of that out the pics as possible :wink: you know just to be safe lol but thank you sir
The first clue for me was "Location: florida/iraq" and I second the complement!
by calinb
Mon Sep 01, 2014 1:38 am
Forum: Silencersmithing Forum
Topic: Anybody done a form 1 using the new online eforms service???
Replies: 48
Views: 8823

Re: Anybody done a form 1 using the new online eforms servic

I received my approval email. Will I receive anything in the mail ? Or do I just print out the PDF file ? I wondered the same thing after getting my approval email notice and phoned the ATF. Nope--you don't get an actual and official-looking stamp or any thing else via snail mail. You just download...
by calinb
Sun Aug 31, 2014 5:26 pm
Forum: Silencersmithing Forum
Topic: Ti-Thirty Form 1
Replies: 41
Views: 5657

Re: Ti-Thirty Form 1

Decided to do my F1 .30 can in Ti and this is what i came up with: Wow--nice! Thanks so much for posting. I've been thinking along nearly the same lines for a 6mm can I'm planning (welded "thin" wall grade 9 tube, press-fit cones and spacers, etc.), but I'm not a welder (though I can hack small stu...
by calinb
Tue Jul 29, 2014 7:14 pm
Forum: Silencersmithing Forum
Topic: 308/7.62 Design review
Replies: 16
Views: 7610

Re: 308/7.62 Design review

Also, I was able to do a comparison of clipped vs. not clipped. Clipped happened to be better for you but I'm not sure that welding the caps has a downside with respect to the clip or not to clip issue. Technically, if the clipped cones don't work as well as the un-clipped ones, you're still stuck ...
by calinb
Wed Jun 04, 2014 5:01 pm
Forum: Silencersmithing Forum
Topic: Go or no-go lathe question
Replies: 14
Views: 1097

Re: Go or no-go lathe question

If you decide to try my single profile thread mill trick, check out the second to the last page here for speeds: http://www.sct-usa.com/pdf/SCT_catalog_609-web.pdf I suspect the pressure on the tube will be less than single point threading with a traditional cutter so your rest support may not need ...
by calinb
Tue Jun 03, 2014 6:32 pm
Forum: Silencersmithing Forum
Topic: Go or no-go lathe question
Replies: 14
Views: 1097

Re: Go or no-go lathe question

I'm hardly an expert machinist but I always say machine work is only 10% machine and 90% machinist. A machinist can compensate for a marginal machine with a clever setup and plenty of patience. I've done a lot of work with 440C (annealed) and 4140 (hardened) on my hobby lathe and mill. Nevertheless,...
by calinb
Tue Jun 03, 2014 12:58 am
Forum: Silencersmithing Forum
Topic: Threaded K Baffle Monocore
Replies: 48
Views: 4697

Re: Threaded K Baffle Monocore

Can you please post some examples of the K baffles bending as described? Link>>> Watched a can get ruined. The wall is certainly thin where it failed, but keeping the baffles in tension might permit a thinner and lighter baffle stack than one that is held in compression between end caps. Seems like...
by calinb
Mon Jun 02, 2014 4:44 pm
Forum: Silencersmithing Forum
Topic: Like to find old thread about OD threading tube for endcaps
Replies: 2
Views: 471

Re: Like to find old thread about OD threading tube for endc

Found Thanks for the help Capt and maybe a link....? I've been waiting for someone to (hopefully) provide that link, because I'd like to re-read that thread too. Lately I've been thinking that the only reason people avoid OD threaded tubes is they tend to be ugly. For a very small weight penalty, e...
by calinb
Wed Sep 26, 2012 2:58 pm
Forum: Silencersmithing Forum
Topic: Happy day - stamps arrived
Replies: 4
Views: 502

Re: Happy day - stamps arrived

Approvals have definitely sped up! I expected to wait over a year, based on the slope of the approval lead time curve of six month ago, but what a surprise I discovered in the mail yesterday. Just over 5 months from BATFE receipt of the application to delivery in my mailbox. Sandra J. Snook was the ...
by calinb
Tue Jun 26, 2012 1:26 pm
Forum: News Stories
Topic: Utah shooters spark 20 wildfires -- and a gun rights controv
Replies: 19
Views: 498

Re: Utah shooters spark 20 wildfires -- and a gun rights con

This doesn't pass the smell test for me. <snip> Sounds like some dolt set fire to the woods with their cigarette whilst shooting... and decided to "blame the bad gun" because they thought they would get in less trouble. Not believing the story here. Doesn't add up. I agree. Tracers? Sure--I can bel...
by calinb
Mon Jun 25, 2012 1:10 pm
Forum: Legal and Political
Topic: Attack on the First Amendment
Replies: 8
Views: 795

Re: Attack on the First Amendment

This thing is full of so many holes that it should be unenforceable, and nullified, on the spot. Let alone the fact that it is directly contrary to the very definition of the 1st, in that "free speech" isn't a right so much as a protection from the government. As with all laws, if a cop somewhere i...
by calinb
Sat Jun 23, 2012 5:17 pm
Forum: Legal and Political
Topic: 1 trust copy with multiple Form 4s??
Replies: 4
Views: 763

Re: 1 trust copy with multiple Form 4s??

I recently sold a car and am going to use some of the cash to make a big NFA submission of 4 items. I have used my trust for 2 purchases thus far this year (neither approved yet). I have read some say to put each Form in a separate envelope. So does that mean: 1. I need to write 4 separate checks f...
by calinb
Sat Jun 23, 2012 2:37 pm
Forum: Legal and Political
Topic: Attack on the First Amendment
Replies: 8
Views: 795

Re: Attack on the First Amendment

That's more than an attack. That might as well have been a repeal of the first amendment altogether. After all the first amendment wasn't put in place so we can talk about the weather. It was put there so we can show our grievances with our government. And the Second amendment wasn't put there for ...