monocore machining?

[mattman0o0o]

When machining a monocore is something as robust as this needed? Or would simply clamping the bar stock between some V blocks suffice?

[fishman]

Depends on a lot of factors. Aluminum? Titanium? Is the bar round or square during this stage? How heavy of a cut are you making?

[mattman0o0o]

Call it turned to diameter already and SS.

[fishman]

Call it turned to diameter already and SS.

The best way to know would be to try it, but I'd imagine you wouldn't need a fancy figure if you kept your cuts light.

[cdrissel]

Call it turned to diameter already and SS.

What flavor of stainless steel?

[Historian]

The legion of possible designs have their own
set ups. Googling 'monocore silencer' you get
an overview of various topologies.

The most basic of course in the primitively efficient
Stechkin silencer with its few tilted disks.

Instructive video:

<< https://www.youtube.com/watch?v=rDHkTvv4RAE >>

Third Video shows milling holes:

<< https://www.youtube.com/watch?v=Hyc37aHNZ7k >>

Look forward to your presentation when done.

Best.

[T-Rex]

Why not mill from square bar and turn between centers?
Just use the mill vise and forgo the jig.

What are the circles, just inside the row of bolts?

[Historian]

Why not mill from square bar and turn between centers?
Just use the mill vise and forgo the jig.

What are the circles, just inside the row of bolts?

So darn clever!

Best

[mattman0o0o]

would turning the square to a round with all those pockets work? Never tried that before.

[T-Rex]

You're right to be concerned as you will have an interrupted for the majority of turning.
Before you remove it from the vise, use a round-over bit (in the mill) to remove the corners. You don't have to be perfect, just remove material.
Use a hefty, square negative, basic shaped insert.
Slow turning and feed rates.

What extra time the slow turning would require will be gained w/ not having to make a jig.

You could, also, use a 12" piece of square and turn the center portion (between centers) down to finished OD. Use the square ends to fix in vise.

What are the circles, just inside the row of bolts?

[mattman0o0o]

Here's the page I found that jig on, not sure which circles you're asking about, this page explains the guys whole set up.

http://www.ar15.com/forums/t_6_20/35267 ... tml&page=1

[Fulliautomatix]

What are the circles, just inside the row of bolts?

Those holes are in the jig to allow machining of the scallops tangential to the OD of the monocore. See the isometric view of the monocore, and of the jig below.

[Fulliautomatix]

Seems like it is overly complicated and will add significantly to the time to manufacture each monocore. Very labor intensive to access that jig and unbolt/rebolt each one of those caps as you machine each cavity.

[T-Rex]

I thought as such. I just don't like to assume.

[JFettig]

You guys are over thinking this whole thing, just mill some soft jaws with your cores outside diameter and clamp it with about 10ft-lbs of torque.