Fitting a vibration-proof bell for drop bars I have a bike with drop bars which I need for commuting, but I live in a city which is not only full of idiots&dagger; both on foot and on bikes themselves (thus meaning going bellless is idiotic), but also full of broken paths and cobblestones.

I've now lost two bells due to them vibrating enough to the point of coming apart &mdash; I try to screw them together after every few rides, but at some point they just come apart while riding and I lose the bits needed to put them back together:



Issues


Bell: Unfortunately, the screw head holding the whole thing together slowly becomes looser over time, making the bell function worse and worse and even becoming somehow "out of tune" making it not work well even when tightened with one hand while riding... and then when riding over lots of e.g. cobblestones, I hear it go ring-ring-ring while loose and then it stops ringing... forever. Screw head gone missing.
Bike: I've got drop bars with old brake levers which can hardly be used at all from the hoods, meaning that I spend all my time in the drops and thus that the bell has to be accessible from the drops.


How can I fit a bell to my bike which is durable enough to survive lots of vibration and yet still be easily accessible from the drops?



&dagger;In this regard, possibly the only places in the world which can safely be called idiot-free are all in the Netherlands or Denmark.
If your screw head is actually a nut, like the picture looks like, replace it with a nylock nut. If that is not possible, thread lock fluid like blue Loctite works nicely.