Why left hand threads on pruning shears?

[Clarkmag]

One blade has threads
The other blade has a bigger hole.
There is also a nut on the bolt.

 

[toolchaser]

So the cutting action doesn't tend to loosen the nut

 

[2oolhound]

^^^ My guess as well.

There is pressure on the nut on the cutting stroke when everything tightens up but very little pressure on the nut on the release stroke.

 

[Clarkmag]

ok, I get it now.

 

[KnurledNut]

So the cutting action doesn't tend to loosen the nut

I would think the cutting action would actually tighten the joint if it was RH.
IMO, the LH is used to keep that from happening.

 

[PugetDude]

Clark, you need to return those and ask the clerk for a pair of right-handed pruning shears.

Report the results of your visit.

 

[rlitman]

Clark, you need to return those and ask the clerk for a pair of right-handed pruning shears.

Report the results of your visit.

Those are right handed. FYI, Felco (and several other companies) do make left handed models.

 

[2oolhound]

I would think the cutting action would actually tighten the joint if it was RH.
IMO, the LH is used to keep that from happening.

Wouldn't ya know, someone who looked at the photo and actually put some though into it would come along...