hydraulic cooling Gear Motors

Introduction of Group2.5 Gear Motors

Group3 Gear motors from GRH have a floating bushing feature with automatic axial clearance compensation. The bushings are made with special abrasion resistant material providing improved service life. Precisely machined gears ensure our units provide excellent low noise characteristics. Our cold extrusion motor bodies can endure pressures above 30Mpa. High strength cast iron front & rear covers also enhance our reliability. Our units are widely used in the industrial, mobile, marine and aerospace industries.

They can be divided into two types. One is the single direction Gear Motor, the other is the bi-direction gear motors. Normally the design of the single direction gear motor is similar to that of the single direction Gear Pump with some slight design differences. Therefore, all GRH pumps have a corresponding single direction gear motor. When placing your order, please refer to the ordering code.

We now focus on the bi-direction gear motors. This motor has a different sealing structure to the single direction motor. The symmetrical sealing (refer to the bottom drawings) separate high pressure from low pressure thus allowing bi-direction operation. The oil from internal leakage returns to tank through the drain port. Normal case drain pressure is limited to 2 bar, but 5 bar is allowed for intermittent operation. High quality of the bushings, bearings and seals adds to the outstanding performance of GRH bi-direction gear motors. 

Characteristics

Direction of rotation: bi-direction and single- direction

Permissible ambient temperature range: min= -20℃-max= +60℃

Operating pressures:input side P1 max = refer above data; outlet side P2 max =3 bar

Drain pressure: max = 2 bar, short time: max = 5bar

Fluid temperature range: max=90℃ for NBR rotary shaft lip-type seal, 100℃ for FKM rotary shaft lip-type seal

Viscosity range: min= 10 mm²/s-max= 600mm²/s

Filtration

Recommended Vicosity range: V=30...45mm²/s

Recommended hydraulic fluids use: GB11118-94 : L-HM46 or equate NFE-603/DIN515524II-85

Specifications

Calculated Formulas

Dimensions

Ordering Code