Quote:
Originally Posted by lurkingknight
Polycarb as a material is great for impact resistance... it does not do well with stretching and shearing; it's a bad choice for pistons.
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I agree. Polycarbonate is a terrible choice for pistons.
But prometheus pistons aren't polycarbonate, and neither are marui pistons.
Marui I believe are nylon fiber, gives it more elasticity than polycarbonate and therefore way more resistance to cracking.
From what I can tell the prom pistons are polyoxymethylene, from the 2nd tooth removal I've done on a few of them, they cut just like POM. If not they're some kind of high tensile plastic.
Also +1 on a sacrificial piston being an out-dated idea.
If you set up a mechbox properly, the piston will last years. And even if it does strip, it typically won't hurt the gears unless they're really weak.
I've never seen a piston strip or internal failure damage high quality gears