pressure screws: what are they for?

[DoctorBomber90]

Good evening.
It's been a few days since I ran into these vines inside a set.
I found some suppliers, such as kipp and norelem, where they explain their operation.
from what I understand, are screws that tend not to spoil the support surface of the piece/component caused by excessive tightening of the screw.
example, if I have a classic screw and exaggerated in the tightening, then I create excessive tensions such as to spoil the piece.
while a pressure screw, having a ball held by a spring or an extremity made of a tender material, such as the brass, tends to maintain the reciprocal contact between the head of the pressure screw and the body in question, without extinguishing it or ruining it.
Am I right?
can have other purposes or other uses?
Thank you to anyone who can give me some insights about it.

 

[asblo]

I believe that greater use, at least what we do, is for hand-blocking. imagine the sphere that comes out in a seat, where inside insert and remove a pin of the same diameter of the seat. the ball will make by manual closing

 

[Marco F inox]

These screws or grains generally have a tempered steel ball, not to be hulled by the material they string, especially when used by making their spring work.
in this case on the piece, fixed or sliding, are engraved of the conical or small holes, where the ball will enter partially, pushed by the spring, to ensure the stop in a precise position, like leverages or sliding elements.
when you want a locking at any point of the slide, you need to use the screw, even flat-headed with the cylindrical insert of brass.

 

[DoctorBomber90]

@asblo e @marco f inox Thank you very much for your explanations. I have seen on the site of the norelem a video-example of how they work, of which I attach the link. operation pressure screws