locks

[johnson]

crank,lock,lever,bar what is the precise difference between the meanings of these terms?
ie is the a difference between an arm bar or an arm lever?

[SoKKlab]

Och this is a tough one to answer, because alot of the time the terms are interchangeable, but i'm gonna have a go anyway.

To me, Personally, I usually say Arm Bar, when either it's a lying down technique Ie When you have secured their arm across your body and are Bowing their arm via the use of your body/ Legs and have the Force point concentrated at the wrist, ie where your grip is and forces a straightening, hence Barring of the arm at the elbow opposite to the joints normal range of motion.

But then I usually describe the encircling of the punching arm whilst doing O-soto-Gari as an arm Bar as well and the Arm Lock that is the same technique: Your Forearm under their elbow joint, Your Hand manipulating their Shoulder backwards and then sinking your weight to straighten their arm.

Levers I'd describe as Cants, literally where an Arm etc is being Levered into a Forceful and damaging position by either a bending and twisting motion, particularly against the wrist elbow shoulder combination. But then maybe that's just me...

Arm Bars then I'd say were against a straight arm and involve forcing the elbow joint against its range of normal motion and Levers were bending the arm into Origami shapes and manipulating the joints in as many ways as you can get them to stress.

But then any good lock will lock up the entire chain and not just the Joint that is the fulcrum and of course any Force Point becomes a lever if it is going against the Normal range of motion of a joint...

A Crank I'd only use that term to describe a way of trying to Wrench a joint with a sudden powerful movement or failing the initial assault then with sustained pressure .

Ie A neck Crank, you try first to wrench their neck/ head for a quick submission and then put continuous presure on the chin/neck/ head if the first attack doesn't do the job.
To me Crank sums up an attempt at a dynamic movement.