Originally Posted By RedThree
You're right Dan, with the rubbers removed the inner part spins without touching the outer.


I'm about as far from a materials engineer as it's possible to get, but wouldn't this arrangement mean that the Centa drive rubbers are constantly suffering from shear forces? No wonder they break up.

I wonder why they didn't use a simple cush-drive arrangement of interleaving plates separated by rubber blocks, like in the final drive sprocket of motorcycles? Then the blocks would only be exposed to compressive forces and would presumably last a lot longer (I've never heard of a cush drive wearing out in a few thousand miles).

There must be a reason, maybe they couldn't find one of small enough diameter.

Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE