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This model differs from the GM2 in that it has a 90 degree output shaft. These impressive 224:1 gearmotors are very comparable to a hobby servo for power, at a fraction of the cost! This motor offers 50 in*oz of torque, rotating 360 degrees every 1.6 seconds (38 rpm - just a hair slower than a servo), at 5V, drawing 600mA at stall (free running at 52mA). With a 7mm double-flat output shaft (avoid using the "D" output - it's not meant to take rotational load), and a built-in clutch (limiting at 60 in*oz, but easily "locked"), and built-in mounting screw holes, you can see why we like these motors! These units have an overall size of 55mm (2.17") x 48mm (1.89") x 23mm (0.906") thick, while only weighing 37grams or 1.31ounces.
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