What tools to use?

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sizulku
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What tools to use?

Post by sizulku » Sun Feb 08, 2015 12:26 pm

Hi Gents,

Just a simple questions. How to make knurled (?) pattern like on SilencerCo suppressor tube? What tools are required? Thank you.

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Re: What tools to use?

Post by pyrofx » Sun Feb 08, 2015 2:06 pm

If you have to ask that question , I dont think the rwst of the machining is going to be up your alley either. Think end mill.
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Re: What tools to use?

Post by Bendersquint » Sun Feb 08, 2015 2:07 pm

Nothing wrong with asking a question.

They are done using an endmill on a CNC mill using a 4th axis.

I guess you could do it manually using a rotary indexer but it would be a pain.

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Re: What tools to use?

Post by john.t.little1 » Sun Feb 08, 2015 2:08 pm

Thin wheel on bench grinder
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Re: What tools to use?

Post by WhisperFan » Sun Feb 08, 2015 5:45 pm

john.t.little1 wrote:Thin wheel on bench grinder
But never with that level of precision
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Re: What tools to use?

Post by Archilochus » Sun Feb 08, 2015 6:40 pm

I've done something sort of like that with an endmill, scribed lines, multiple re-clamping, and lots of spinning-o-the-handwheels and counting turns.
As was mentioned, time consuming PITA. Would just knurl it and call it done.

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Re: What tools to use?

Post by ChimeraPrecision » Sun Feb 08, 2015 7:11 pm

rotary 4th axis indexing with a flat endmill. The feature is created with a plunge cut so a centercutting endmill is required.
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Re: What tools to use?

Post by john.t.little1 » Sun Feb 08, 2015 9:27 pm

WhisperFan wrote:
john.t.little1 wrote:Thin wheel on bench grinder
But never with that level of precision
Was ment to be satirical. Damn emotionless internet
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Re: What tools to use?

Post by 300sniper » Sun Feb 08, 2015 9:37 pm

ChimeraPrecision wrote:rotary 4th axis indexing with a flat endmill. The feature is created with a plunge cut so a centercutting endmill is required.

Using the side of an endmill would be much better for tool life, surface finish and would also create a better blend into the top surface. It almost does look like there are swirl marks from plunging an endmill but it is really hard to tell when I blow up the picture. I also can't tell if there is a sharp step between the max OD and bottom of the notch. I know if I were to do it, I'd run the side of an endmill, taper in/out of the cut and index with the 4th.
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Re: What tools to use?

Post by JSTactical » Sun Feb 08, 2015 9:48 pm

Just wondering if anyone has used our tooling here to complete a form 1 project. Any feedback?
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Re: What tools to use?

Post by Bendersquint » Sun Feb 08, 2015 9:55 pm

JSTactical wrote:Just wondering if anyone has used our tooling here to complete a form 1 project. Any feedback?
Image
Probably be better to start a new thread than hijack one.

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Re: What tools to use?

Post by JSTactical » Sun Feb 08, 2015 10:04 pm

Bendersquint wrote: Probably be better to start a new thread than hijack one.
Sorry about that. I just saw the thread about the tooling used. How can I delete my post? I don't mind removing it.
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Re: What tools to use?

Post by T-Rex » Mon Feb 09, 2015 10:01 am

300sniper wrote:
ChimeraPrecision wrote:rotary 4th axis indexing with a flat endmill. The feature is created with a plunge cut so a centercutting endmill is required.

Using the side of an endmill would be much better for tool life, surface finish and would also create a better blend into the top surface. It almost does look like there are swirl marks from plunging an endmill but it is really hard to tell when I blow up the picture. I also can't tell if there is a sharp step between the max OD and bottom of the notch. I know if I were to do it, I'd run the side of an endmill, taper in/out of the cut and index with the 4th.
Yeah, but you wouldn't, accurately, replicate the finish created.

To the OP:
You could make a jig, to hold you tube between centers, out of plywood.
A simple indexing plate, on one side, would help in keeping radial seperations equal.

This is for jeweling a bolt, but honestly, the setup is the same for either. Just a different tool bit in the chuck.

Image

Align Jig
Fix Jig
Set Depth
Make cut
Rotate per your particular separation angle
Make cut
Repeat until first rotation is complete
Move jig laterally
Divide separation by 2
Repeat


Personally, I would practice on a scrap piece of pipe, beforehand.
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Re: What tools to use?

Post by joe0121 » Mon Feb 09, 2015 11:43 am

There is a place by me that does NFA engraving maybe a laser engraver can take 3-4 passes and get down to say .010 and be sufficient.

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Re: What tools to use?

Post by sizulku » Mon Feb 09, 2015 11:52 am

Gents, thank you for feedback. Seemed I need to forget to have this pattern on my home build, it's beyond my skill. :D

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Re: What tools to use?

Post by T-Rex » Mon Feb 09, 2015 12:30 pm

sizulku wrote:Gents, thank you for feedback. Seemed I need to forget to have this pattern on my home build, it's beyond my skill. :D
I've read some of your posts, it is NOT beyond your skill.
Could you drag a drill press over to your lathe?
If so, you could use the lathe as the indexing head and plunge the end mill with the drill press.

I'd put a center in the lathe to align the drill bit to, before proceeding.

Try it on a piece of pipe before you tell yourself it is un-achievable.
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Re: What tools to use?

Post by JSTactical » Mon Feb 09, 2015 12:42 pm

It sounds kinda hokey, but I've seen guys mount a tube or something they need to mill out on their tool posts and run an end mill in their lathe. Maybe take your tube and make some alignment marks around it then line that up with the jig you create.
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Re: What tools to use?

Post by Bendersquint » Mon Feb 09, 2015 12:46 pm

JSTactical wrote:It sounds kinda hokey, but I've seen guys mount a tube or something they need to mill out on their tool posts and run an end mill in their lathe. Maybe take your tube and make some alignment marks around it then line that up with the jig you create.
Not hokey at all, actually done often!

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Re: What tools to use?

Post by sizulku » Mon Feb 09, 2015 12:48 pm

T-Rex wrote:
I've read some of your posts, it is NOT beyond your skill.
Could you drag a drill press over to your lathe?
If so, you could use the lathe as the indexing head and plunge the end mill with the drill press.

I'd put a center in the lathe to align the drill bit to, before proceeding.

Try it on a piece of pipe before you tell yourself it is un-achievable.
T-Rex, thank you for encouraging me, I greatly appreciated it. I will try it next weekend.

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Re: What tools to use?

Post by JSTactical » Mon Feb 09, 2015 12:51 pm

Yeah nothing wrong with challenging yourself. That's the joy about this stuff is you get to be creative. Post some pics once you try this out. Who knows you may find a great way to do this that a lot of guys would love to learn from!
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Re: What tools to use?

Post by sizulku » Mon Feb 09, 2015 12:57 pm

JSTactical wrote:Yeah nothing wrong with challenging yourself. That's the joy about this stuff is you get to be creative. Post some pics once you try this out. Who knows you may find a great way to do this that a lot of guys would love to learn from!
Thanks man. will do that.

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Re: What tools to use?

Post by JohnnyO » Thu Feb 12, 2015 8:50 pm

Yes a rotary table indexer and a milling machine. I'm just seeing this now, I don't come her that much anymore.

Image

Image
Image

This is what it looks like when you use the side of the end mill
Image

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Re: What tools to use?

Post by gunny50 » Fri Feb 13, 2015 9:25 am

JohnnyO

Nice machine work, looks great.

please tell us more about it.
blast baffle looks promising to.

all Ti outside?

Gunny

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Re: What tools to use?

Post by sizulku » Fri Feb 13, 2015 1:10 pm

JohnnyO, excellent work man! I think I'm gonna find some one who can do this to me. Is it legal to send suppressor tube to US to get this machined?

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Re: What tools to use?

Post by gunny50 » Fri Feb 13, 2015 1:19 pm

sizulku wrote:JohnnyO, excellent work man! I think I'm gonna find some one who can do this to me. Is it legal to send suppressor tube to US to get this machined?
Sizulku
Suppressor parts need a tax stamp, and for US it is not easy to bring in Silencer (parts)

You will be able to find a machineshop local that will be able to do that, no problem.

All you need is to specify the spacing, amount of cuts, cut depth, and how many rows will be around the circomfence of the tube.

Gunny

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