Al Lorona wrote:
Has anybody noticed that Super Glue (cyanoacrylate clear liquid glue) just
doesn't seem to work any more? I remember when it first came out that it
used to bond anything and everything. Lately, seems that I can't even fix my
son's toys with it any more.

Latest failu Just tried to glue a small 12V DC fan for a PA with it and
the bond came apart the next day pretty much by itself.

Many modern plastics are not effectively glued with plain old super
glue (Well, for me modern is anything newer than Bakelite). There are
some CA glues that include special activators to help stick to these
plastics but they aren't magic bullets, they turn a failed joint into a
marginal joint.

If you can rough up the surfaces involved (using more area than just
the broken joint) and use a glue that will give a good fillet around
the joint, that'll help. There are thick super glues and epoxies that
help there.

It's very odd that a fan blade would have broken off all by itself.
Usually indicates some sort of mechanical interference (guard loose,
maybe bearings so worn that it's rubbing against something else.)

Tim.