Clutch plate install question

[OreoGaborio]

I realized while looking at my old clutch (after I buttoned everything back up) that the steels have a very flat side and a slightly more rounded side to them, caused presumably by the stamping of the plates.

Are they directional?

[Chippertheripper]

I don't THINK so.

[OreoGaborio]

Me neither but I figured I'd ask to be sure.

[Degsy]

No.

[Stromper]

If I have a clutch apart I dress all sharp edges

I would think the stack would move IN easier under spring pressure

If the radius was in the IN direction

But I doubt it matters

[Kurlon]

You want all the sharps going in the same direction. Either all sharp edges in, or sharp edges out. No need to dress them, etc, just be consistent in how you stack them. Now, as to the why: If you don't stack them consistently you end up with a fiber that's between two rounded faces, meaning it sees less steel surface area than the other fibers, and vise versa one fiber will see more due to having both stamping edges against it. Net result is under duress that fiber between two rounded edges will give sooner, and your stack will slip and wear sooner than it should. This is coming from the drag racing world but I'd consider any slipper setup just as stressed.