High Torque, Hydraulic Piston Motors

Featured Product from jbj Techniques Limited

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» shaft end can be subjected to high radial and axial forces
» only very few moving parts in the rotating group
» extremely low moment of inertia
» instrument shaft may be fitted
» low leakage-built in wear compensation
» suitable for use with fire resistant fluids
» low maintenance
» small ports are B.S.P. type G threads according to ISO 22811
» full torque available over complete speed range
» immediately reversible
» high starting torque
» no counterpressure necessary when operated as a motor
» suitable for use as pumps with boosted system
» eminently suitable for control systems
» control of feed and discharge possible
» may be operated in parallel
» total efficiency up to 96%
» SAE Flange connection

These hydraulic motors have a high starting torque, ideal for instance, for safe operation of the heavy gates on the material lock in a nuclear power plant or to hand over the weighty coils in a rolling mill.

Due to the low amount of revolving mass, the rotational direction can be quickly changed a feature very important in many test benches; when performing vibration tests on motorcycle forks or when testing the adjustment of wing flaps on aircrafts. The components can perform up to 50 rotational direction changes per second.

An exact adherance to the specified rotational speed profile is of essential importance for many fields of application of hydraulic motors. Here is a new generation of motors, for which a significantly improved constancy of rotational speed is achieved compared to conventional motors.

Low speed, high torque (LSHT) hydraulic motors.

Technical specification catalogue available for KM11 to RM250N radial piston motors. Hydraulic radial piston motors with fixed displacement, conform with ATEX directive 94/9/EC, applied standards EN 1127-1, EN 13463-1, EN 13463-5.


Latest technical specification catalogue for the RM1000X to RM5000X series hydraulic rotary piston motors. With fixed displacement, conform with ATEX directive 94/9/EC, applied standards EN 1127-1, EN 13463-1, EN 13463-5.

» up to 50 rotational direction changes per second.
» high starting torque.
» total efficiency up to 96%

An efficient, robust range of hydraulic motors.

The high precision motor can achieve speeds of significantly less than 1min-1 with already good constancy of speed in unregulated operation. The maximum speed is still up to 2000 min-1, depending on the motor size. The radial piston hydraulic motor has been designed with a high load capacity. It is efficient, has a low moment of inertia and is capable of very low speeds and has excellent reversing properties.

The concept features make it extremely quiet, being suitable for servo control systems with facility to work either as a motor or pump in both directions.

Drive Motor: consists of a close grain, high strength, cast iron cylinder block. Eccentric crankshaft concept.

Operating characteristics: five radial piston/connecting rod assemblies bear on the crankshaft which is located by heavy duty tapered roller bearings.

Crankshaft bearings: preloaded to take the thrust in both axial directions, ensuring silent running and allows heavy radial and axial loading on the output shaft (e.g. gear drives).

Visit www.jbj.co.uk/hydraulic-motors.html for further details and a series of 3 technical specification catalogues for your information and reference.