The E-Motor is a 9V motor with an internal gearbox. Its 9.5:1 gearing ratio provides a maximum torque of 4.5 Ncm and approximately 800 rotations per minute without load. It also functions as a very efficient generator. New to LEGO® Education Machines & Mechanisms? Find out more about this exciting range. Downloads Discover a whole range of downloads for LEGO Education Machines & Mechanisms, including activities and building instructions.