What is this thing?

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Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.

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[Challenge Solved] Weird assembly — I think this will be a hard one :) (i.imgur.com)

submitted 1 week ago* (last edited 1 week ago) by [email protected] to c/[email protected]

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Some light hints that may point you in the right direction:

Hint 1

The assembly is a part of a larger machine.

Hint 2

Several assemblies are meant to move side by side in unison.

Hint 3

The square-ish shaped piece is plastic that will wear down and be replaced.

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[–] [email protected] 2 points 1 week ago (1 children)

Looks like a gear ratchet. Slope on the left piece allows a gear to rotate in one direction. Clamp on a bar on the right allows the assembly to be lifted to allow the gear to rotate in the other direction as well. Like a sort of gear brake?

[–] [email protected] 1 points 1 week ago

Not quite. The assembly moves around for other reasons.