left hand or right hand thread?

[Seeker]

left hand or right hand thread?

Why not have both, on the same bolt:

https://www.youtube.com/watch?v=ITCD...ature=youtu.be

[Adam Ef]

Could see this being useful for bicycle pedal threads... the amount of times I've had someone come in with trashed threads inside £150 crank sets because they haven't realised the RH / driveside pedal is reverse threaded and have tried to fit the LH pedal in it.


Not sure how secure it would be though?

[Chris_SVS]

Do people ever ask you what size they are? Even though all but the rarest of cranks are 9/16in threads

[SV650rules]

Originally Posted by Adam Ef

Not sure how secure it would be though?

Not very strong at all, seems to be a series of bumps on the male part and the shallow angle on the flank of thread that provides the tensile ( lock-down ) force is very shallow, the steeper ( stronger ) flank angle is on the wrong side - nice as a project and ingenious but probably useless in real life as the contact area(s) between nut and bolt is rather small.