Any idea how this sling stud works?

[angrybear]

Inside there should a spring & a cone of either metal or plastic the spring pushes the cone up which forces the bearings out to engage in the socket, you could try penetrating oil in case it's a bit rusty or dirty inside.
I don't suppose there's a grub screw or circlip to disassemble it when you look in the hole in the bottom or do the two halfs unscrew ?

[phil384]

There is a cone but it doesn't move. I've tried using force as much as i dare in a vice. Could try WD40 I suppose. I did wonder if the cone is supposed to move.

[phil384]

Cant see that it comes apart, no

[pothunter]

Cant see that it comes apart, no

Just a guess but is there a hex head grub screw down the middle that as you wind it in it pushes the cone in and the bearings out to form a tight fit??

[phil384]

Just a guess but is there a hex head grub screw down the middle that as you wind it in it pushes the cone in and the bearings out to form a tight fit??

You beauty! There is! Problem solved!

Thanks buddy. Obviously I knew that all the time, ahem, cough.....