Brother’s ie3 premium efficiency gear motors cost less to operate and demonstrate clear benefits when running for long periods of time when compared to ie1 standard efficiency gear motors. Brother high efficiency gearmotors feature hypoid gearing technology that can maintain efficiency above 90% throughout the motor’s wide speed range. Compared to commonly used worm gears efficiency of 49% to 90% efficiency – Brother’s ie3 premium efficiency gearmotors can result in massive energy savings. Brother Gearmotors have a wide speed range that does not suffer in efficiency from the motor or gearbox. Brother Gearmotors can be mounted in any direction because they are grease filled.