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 Post subject: Titanium 556 can
PostPosted: Sat Nov 10, 2018 11:47 pm 
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Silent But Deadly
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Just finished the first of my two 556 cans.
All titanium except the blast baffle is 17-4.
6" long and 1.625" wide

Finished cones on the left. On the right is how I parted them off the barstock.
Image


Here's how I finished them
https://i.imgur.com/dGTU08w.jpg
https://i.imgur.com/x1nDrzG.jpg


Cutting the shoulder for the front cap
Image


Threading the front cap (for the second identical silencer)
Image


Here's the geartrain connecting the spindle and lead screw for threading
Image


I borrowed a bigger lathe for the rear cap
https://i.imgur.com/KW3kxQZ.jpg
https://i.imgur.com/0PhnNPx.jpg
https://i.imgur.com/r0J6Da4h.jpg

Baking the cerama-kote
https://i.imgur.com/8XhMYsf.jpg
https://i.imgur.com/Fu6Wp57.jpg

Milling the clips
Image
Image


Most was done on a puny little sherline 4400
https://i.imgur.com/H3wAYkqh.jpg

I made this BEAUTIFUL steady rest for it
https://i.imgur.com/jHiyGuR.jpg

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 Post subject: Re: Titanium 556 can
PostPosted: Sat Nov 10, 2018 11:56 pm 
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Silent But Deadly
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Looks great.

If the cerakote doesn't hold up as well as you would like, try refinishing it with Norrells Moly in socom black.

If you heat up the parts warm to the touch, it will give it a flat black appearance because it flash cures. And if it's room temp, will be somewhat satin. If you coat it on thick at room temp, will get an HK'ish gloss to it.

From my experience with using it on my first can more than a decade ago, I can say it has held up great.

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 12:37 am 
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Silent But Deadly

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I don't envy you trying to make Ti and SS baffles on a little jewler's lathe, but your results look good!

I use a similar method to finish the outside of the cones on my little 618 after parting them off on the big lathe. But I'm only taking a couple light passes to remove tool marks and clean up the aperture, not trying to profile them. I bet that took awhile!

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 2:33 am 
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Silent But Deadly
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That lathe works great; it's just slow. It'll stall trying to take .025" cuts at a reasonable feed rate. Parting is the hardest; the tool needs to be absolutely perfectly straight and I have to feed as slow as possible. I usually just throw the bar in the band saw and then face the work after.

...the mill though... Nearly worthless for anything beyond aluminum.

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 2:37 am 
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Silent But Deadly
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John A. wrote:
Looks great.

If the cerakote doesn't hold up as well as you would like, try refinishing it with Norrells Moly in socom black.

Its wheeler engineering ceramakote, not cerakote. Its already starting to flake off, I should've etched or wire brushed the tube before I painted it.

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 9:16 am 
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Silent But Deadly
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I've honestly never tried that one.

I did commercial gunsmithing and refinishing for nearly a decade when I had my FFL's. You'd be hard pressed to find anything that would beat Norrels. In adhesion and scrape resistance and how well it stands up to heat. It's pretty good stuff. As with all finishes though (even park and anodize) it's not death ray proof, but in all sincerity, it holds up really well.

I think all here recognize the time and work it took to make those baffles. I'm not the first to tell you great job on that, but I sincerely mean it.

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 9:29 am 
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Silent But Deadly

Joined: Mon Mar 29, 2010 11:37 pm
Posts: 3134
Allow me to add to the above chorus of kudos on your skills.

And the enviable hand crank is a great piece of machining. It puts my
jury-rigged one to shame. Talent overcomes tool limitations
every time.


Best!


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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 11:35 am 
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Silent But Deadly
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Location: USA.
You must have the patience of a saint to cut those cones on a Sherline.I congratulate you on the fine job you have done.I have seen a few Sherline rebuilt for super precision work,they are impressive with all the accessories.

One of the toughest finishes I ever ran across is Guncote made by KG.We used it in the Navy to protect the 5x54 cannon. A saltwater environment is very tough plus cannon tend to blow paint off the muzzles.Once applied properly it can only be removed by sandblasting plus it helps dissipate heat.I've used this product on exhaust pipes and have found none finer.

Looking forward to the field report.

-CL

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 11:40 am 
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Silent But Deadly

Joined: Tue Jun 21, 2016 5:50 pm
Posts: 194
Holy cow! well I guess I shouldn't complain about how small my machine is! excellent work and even more impressive that you did it with such a small machine.

So I take it that lathe breaks down and turns into a mini mill or do you own the same brand of mill?


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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 12:39 pm 
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Joined: Thu Aug 29, 2013 6:56 pm
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Location: South South Texas
Nice work!

What’s the finished weight?
All titanium except blast baffle?

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 7:58 pm 
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Silent But Deadly
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Hard_ware wrote:
Nice work!

What’s the finished weight?
All titanium except blast baffle?

~12 oz (0.8lbs according to my bathroom scale. 12oz compared to fishing sinkers)
Correct

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 8:07 pm 
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Silent But Deadly

Joined: Tue Jun 21, 2016 5:50 pm
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how does it sound?


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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 11, 2018 8:56 pm 
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Silent But Deadly
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garredondojr wrote:
how does it sound?

I don't know yet

Quote:
So I take it that lathe breaks down and turns into a mini mill or do you own the same brand of mill?
its the same machine.

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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 8:32 am 
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Silent But Deadly
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Good job fish.
How long would you estimate a single baffle taking?

I can second both Moly Resin and Gunkote. Both, great stuff.

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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 9:06 am 
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Silent But Deadly
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T-Rex wrote:
Good job fish.
How long would you estimate a single baffle taking?

I can second both Moly Resin and Gunkote. Both, great stuff.

Maybe 2.5 hours

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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 9:44 am 
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Silent But Deadly
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T-Rex wrote:
How long would you estimate a single baffle taking?

fishman wrote:
Maybe 2.5 hours

I give you props. That's dedication. :wink:

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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 9:56 am 
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Silent But Deadly
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T-Rex wrote:
T-Rex wrote:
How long would you estimate a single baffle taking?

fishman wrote:
Maybe 2.5 hours

I give you props. That's dedication. :wink:

My k baffles took WAY longer. This was a breeze in comparison

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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 11:28 am 
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Silent But Deadly
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Very impressive and looks great.


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 Post subject: Re: Titanium 556 can
PostPosted: Mon Nov 12, 2018 2:12 pm 
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Silent But Deadly

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T-Rex wrote:
T-Rex wrote:
How long would you estimate a single baffle taking?

fishman wrote:
Maybe 2.5 hours

I give you props. That's dedication. :wink:


+1. Like I said, don't envy you doing that on s tiny machine, even as nice as Sherline machines are. I'm running about that time on a stack of 10 skirted 17-4 critters. But speed/efficiency are a whole different animal when it's professional vs personal. And my operation is still painfully slow compared to CNC, but I have a lot more flexibility to make changes on the fly and do one-off stuff, and I'd rather do prototyping, custom builds and form 1 service anyway, much more interesting than monotonous production.

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 18, 2018 5:09 pm 
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Silent But Deadly
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It works :D
I definitely need an adjustable gas block though
http://i.imgur.com/5GOnOGr.jpg

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 Post subject: Re: Titanium 556 can
PostPosted: Sun Nov 18, 2018 5:23 pm 
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Silent But Deadly
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Great job. Looks like all your work paid off.

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 Post subject: Re: Titanium 556 can
PostPosted: Tue Dec 18, 2018 11:29 am 
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Silent But Deadly
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I downloaded solidworks draftsight yesterday and drew this up to help me with the second can. I'm going to try M baffles instead of cones and spacers for the second one. The spacing and baffle profiles are the same. Image

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