GM - Crankshaft design radial piston hydraulic motors GM series motors are a result of the many years' of experience gained with the preceding M, L and P series motors, and incorporate a number of design variations with respect to these series intended to increase the strength of the motor casings and the load capacity of the internal dynamic components. The result is a series of motors with high continuous power ratings, both because of the reduced internal specific loads and because of the high mechanical and volumetric efficiency that contribute in reducing the amount of heat produced and therefore also the negative effects associated with it. Radial injection cylinder feed (1) eliminates direct hydraulic axial loading of the motor casing. Larger cylinder feed channels (1) for reduced power loss with high flows. Stronger castings (2) and internal reinforcement ribbing: increased casing strength and stiffness for higher internal and external load capacity. High load capacity bearings (3) for applications requiring high lifetime, high power/pressure, high external loads. Larger cylinder trunnions (4) for increased strength and stiffness and reduced specific loads.
	Cylinder trunnions with hydraulic balancing (5) to reduce friction, wearing and heat generation, enabling operation with higher powers and improved efficiency. Compatibility with shafts (6), adaptors, distributors of the motors of other preceding series. Standardisation of components for increased modularity and flexibility as regards interchangeability of displacements, spare parts and options. Reduced number of components for a more simple and reliable design. Compatibility with non-polluting oils.
general characteristics and features   article click to enlarge the photo displacement (cm³/rev) specific torque (Nm/bar) technical data pdf GM1 99 - 314 1.54 - 4.90 GM2 192 - 623 3.00 - 9.73 GM3 352 - 987 5.49 - 15.4 GM4 402 - 1316 6.27 - 20.5 GM05 39 - 191 0.62 - 3.04 GM5A 526 - 2007 8.22 - 31.3 GM6 1690 - 3041 26.4 - 47.5