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3/16x1/2x3/16 inch Ceramic Nitride Pro Series Bearing. Can be used wherever an R3 ball bearing is required. This size is the same as many Associated wheel bearings and Brushless motors that require the large bearing. If you are looking for the smaller brushless motor bearing it is typically the the 1/8x3/8 bearing which is our part C036.  To see which ball bearing fits your brushless motor please consult your motor's owner manual. These are the most efficient electric motor bearings.

This is the equivalent of a size R3 ball bearing