In this video I take a look at a number of the fantastic N20 gear motors. Each motor has a different gear ratio, they are 1:50, 1:100, 1:150 and 1:200. I use the screw mechanism on the Liebherr 900 model to compare the different motors to see which best suits a radio controlled excavator.
The N20 motors were purchased on ebay: [ Ссылка ]
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