If the spring bar keeps popping out you probably have a spring bar that's too short. If you get a 19mm spring bar that should solve your problem.
Thanks, I'll check that. Got some sturdy 20mm ones in the post as well.I used the recommended spring bar on the bracelet, but it still
came off. When I checked it out ( Magnifying glass ), it had a
slight (BURR on the edge of the bracelet edge). Therefore it was
snagging the spring bar and pressuring it to move a little inward
and causing it just enough to come of.
What I did was with a jeweler's file touch it up so as to it not
being (sharp edged ).
Whenever something is drilled, its should be ........" D-Burred ",
because it will be sharp edged.
( They call it ......... " Chamfering ". )