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| + | [* black] Bearing or bushing are what the axles of the gears fit into. |
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| + | [* black] If the round circular piece is made from a soled piece of plastic, brass or steel then it is called a bushing. If the round piece made up of multiple pieces with a spinning middle section then it is a bearing with little round balls on the inside kind of like in a skate board bearing. |
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