Hydraulic gerotor motors—compact and powerful

Hydraulic gerotor and geroler motors use an orbit principle, in which six teeth and seven lobes (or rollers in the case of the geroler design) form a rotating or orbiting star. This rotation creates the pressure behind the power density in these compact designs. In this video, Fluid Power World editors Paul Heney and Mary Gannon discuss FluiDyne Fluid Power’s H Series and S Series motors. These low-speed, high-torque motors from FluiDyne are a direct interchange with Eaton/Charlynn,White, Ross, Parker, TRW, and Danfoss brands. They feature low-pressure start-up, high-pressure shaft seals for series or parallel applications, longer life with a special driver-link design, and easy installation thanks to their compact design. The gerotor motor or generated rotor motor, is a long-time staple in powering both mobile and industrial machinery. Eaton created the Geroler motor design to reduce friction, increase mechanical efficiency, and reduce wear in systems with low fluid viscosity. The Geroler type motors also typically feature smoother performance at low-speed conditions of less than 100 rpm. Weighing just 13 lb, the H series gerotor hydraulic motor offers maximum continuous torque of 1,806 in.-lb, maximum continuous pressure of 1,813 psi, and maximum flow of 16 gpm continuous and 20 gpm intermittent. The slightly heavier Geroler S series weighs 17 lb, but packs more punch, with maximum continuous torque of 3,210 in.-lb, maximum continuous pressure of 2,394 psi, and maximum flow of 16 gpm continuous and 20 gpm intermittent. For more information on these products, please visit FluiDyneFP.com. And for more of your need-to-know engineering videos, please check out fluidpowerworld.com.

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