Suppressors Tapered shoulder mount vs. Direct thread

[jackinfl]

What is the mechanical reason that a suppressor mount with a tapered shoulder does not loosen as compared to a direct thread butting up against the square shoulder of the barrel. I only have a statistical example of 1 of each. But the suppressor using the mount w taper seems to not loosen where the other does.

unfortunately its 2 different manufacturers. So that could play into it too.

What are you seeing?

 

[BurnOut]

If you look at the surface area of the two different interfaces (taper mount vs. square shoulder), the taper mount, (which is effectively a cone) has a much greater mating surface area. Additionally, because of the shape of the taper mount, as you tighten the can onto the threads, you're effectively shoving a cone/wedge into the back of the can.

Look at it like a door stop... if you were to take a piece of rubber that measures 1 x 1 x 3 and throw it on the floor to hold a door open, how effective is it going to be? Now take that same piece of rubber and cut it into a wedge, then shove it under the door, using the tension of the hinges/pins against the angle of the wedge... it's going to be MUCH more effective in holding the door in place. That same basic concept is at work here... as it is tightened into place, the cone shape of the taper mount causes (very) slight expansion of the mating surface on the can, thus resulting in a measure of tension that helps hold things in place.

 

[BOLTRIPPER]

the time will come when you forget to give a crank to the end of the can to take the slop out on the direct thread mount, the taper mount use with a multi-point attachment is a mechanically a better option

technology......ain't it grand?

 

[jackinfl]

Burn out, Great analogy. Thank you.

Now, is there any measurable accuracy difference/ benefit between either design?

 

[BurnOut]

Regarding accuracy, I have no practical experience to back this up, but I think that either interface is going to be able to maintain the consistency required for excellent accuracy. I think that the key is in the implementation... shoddy work with either square shoulder or taper mount will give poor results, while careful, accurate implementation of either approach will give the kind of results that we all want.

 

[Zak Smith]

Assuming both are made "ideally", the accuracy and repeatability should be the same, but the tapered version will have more retention and more side to side (transverse) stiffness

 

[jackinfl]

Thank you, guys.

 

[NukeMMC]

And you can also add the fact that the tapered mounting cans (I have an Ops Inc 3rd Model and a 12th Model) also add less to the length of the barrel for the sound attenuation performance of similar cans.