A guy in maintenance was having a difficult time drilling out a pop
rivet. He asked his boss to sharpen the bit. No better he told him "you
can't sharpen a bit for crap". Joe pushed a button on the drill and
said "now try it"
It would sure help if left-handed ones were marked somehow. ;-)
I came close to replacing a lawn edger after I spent a week trying to
(un)loosen the bolt that held the blade. Then there are the cars
where half the lug nuts go the wrong way (at least the threads are
A good rule of thumb is to simply look at the normal direction that the
object spins. Almost always you loosen the attachment nut or bolt in
the same direction. For the nut or bolt to loosen by itself during
operation it has to spin faster than the object that it is holding which
is much less likely than if it loosened in the opposite direction.
Chrysler/Dodge/Plymouth used to do that. The lug nuts loosened on the
left side of the vehicle in the customary direction, counter clockwise.
The right side loosened, clockwise. Countless lug nuts were twisted off
in shops on those vehicles until they stopped that practice.
A nut or bolt is less likely to loosen and come off the farther it is
located away from the center of rotation of what it is holding.
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