When PEM began in 1975, we recognized that there was good demand for custom-designed gear boxes, especially for applications where high shock loads were encountered and space considerations were important. After years of research on how to make gear teeth strong and how to increase power density, we designed our proprietary MEGAGEAR and UNIMEGAGEAR gear geometries. With this new technology, we were able to competitively manufacture gearboxes with excellent durability and efficiency while using less material and labor. Our MEGAGEAR and UNIMEGAGEAR technology offers several advantages over conventional gears. We precisely calculated the optimal section of the involute curve as the tooth profile, which results in a greater contact area between gear teeth. The increased contact area reduces compressive stress, increases surface fatigue life and makes load distribution more uniform. Our geometry also eliminates the possibility of tooth tip shearing. In addition, gearboxes using MEGAGEAR or UNIMEGAGEAR technology perform better than those using standard gears. Equivalent-size gearboxes can have 35% more horsepower using MEGAGEAR or 45% more horsepower using UNIMEGAGEAR. In hydrostatic applications, the greater contact area between gear teeth allows for a thicker oil film, which improves mechanical load transfer. Since our gears have such low tooth deflection compared to conventional gears, gearboxes using MEGAGEAR or UNIMEGAGEAR will run much quieter than other gearboxes.