A gear arrangement, wherein a first pair of spur gears, concentric and rigidly connected for simultaneous rotation are in driving relation with a second pair of intermeshing gears similarly arranged, is rendered more effective in the smooth transfer of power by indexing the teeth of one of the concentric gears in at least one pair relative to the other of the concentric gears in the same pair by an amount between one-half of the circular pitch and full registration.
