I need to connect a DC motor to a square shaft (pictured below). The problem: The Gearhead motor shaft is semi circular with a small flat piece. The shaft is a square face. How can I make this work? I need to demo this working on Thursday, all info is appreciated. [image] [image]

DC Motor shaft coupler

system December 12, 2010, 7:11am 3

I forgot to mention that this is a high torque motor and the load is heavy.

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