Quote:
Originally Posted by Eco Mouse
It's the reason why the counter sprocket nut always comes loose, and needs that keeper tab bent in place. If it was a left hand thread it would never come loose, and perhaps be really hard to get off.
Have you ever noticed that the left bicycle pedal is left hand threaded? It's to keep you from pedaling it off in about 10 strokes.
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Counter sprocket nut: what if the chain/sprocket is on the right hand side of the bike?
Bicycle pedals: If you were to hold the pedal spindle so that it did not rotate and run the cranks forward the spindle would unscrew from the crank! But the ball bearings reverse the force on the spindle and tighten the spindle.
Old military trucks and Chrysler Corp cars. There may have been a theoretical reason to use left hand threads but for practical applications there was no advantage, and the disadvantages of extra part numbers and confusion.
FWIW: years ago when I was working in a bicycle shop a customer brought in a department store bike that he could not get the pedals completely in. He had FORCED the R in the L and the L in the R, each more than half way.
We took them out with a BIG wrench, chased the threads, and put them in properly, with Loctite.
