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Pull-Chain Pulley
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A simple pulley. Spins well with PLA.
Update: Version one, the chain jumped off on my daughter and the axle broke while she was putting the chain back on. So, Version 2 has a pulley half the thickness. The shorter axle should be stronger. And I've added a spring chain retainer to prevent the chain from jumping off the pulley.
Update: Version one, the chain jumped off on my daughter and the axle broke while she was putting the chain back on. So, Version 2 has a pulley half the thickness. The shorter axle should be stronger. And I've added a spring chain retainer to prevent the chain from jumping off the pulley.
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