Heavy duty
Rotary dampers

20 years designing and building high performance hydraulic systems

We have in our plant the capacity to manufacture all types of hydraulic systems: complete damping solutions, special actuators for test benches, customised pressure-relief valves, low-friction telescopic suspension cylinders, etc

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If you have a need we can develop, build and test the solution

We deliver our parts desinged over specifications ant tested on real conditions in our testing facilities.

Wide range applications form automotive or motorsport to defense or constrution vehicles, our solutions are focus on high performace, availability and enegry disipation.

Key features


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We already placed Rotary Dampers in:

Land platforms

Tracked vehicles field is the origin of our rotary dampers. Beginning with the ASCOD platform, Piedrafita's rotary dampers are assuring crew comfort, mobility, and target engagement since 1995 in major defence programmes. We delivered more than 2500 units to prime contractors and contracted to provide more than 6000 dampers in the next years.

Wind turbine test benches

Simulating high passive torque is a problem while using linear dampers. It is the case of simulating the torque resistance of wind turbine blades while modifying pitch angle, reaching a torque over 4 kNm @ 0.5 rad/s. Piedrafita's Rotary Dampers are able to offer you a full hydraulic resistance torque just depending on the rotational speed, not position. We can adjust the damping curve to your needs, avoiding gear boxes or complex assemblies; just place the torque in the rotating point.

Dragline Dipper Doors

A full hydraulic, extreme low friction, and maintenance free rotary damper is the best option for damping heavy loads like dragline dipper doors. When a system is performing 8000 hours a year, forget about dampers maintenance is a distinguishing characteristic. Piedrafita's dampers are ready to perform under the toughest conditions, a great solution to improve mining machinery performance.

Wheeled vehicles

Piedrafita's rotary dampers are ready to serve in wheeled vehicles. While improving suspension performance, heat rejection, weight and reducing maintenance; Piedrafita's rotary dampers has a compression length of ZERO and could be attached to chassis' main beams.

Under construction

We are working on this content right now! Come to discover it in a short time.

Under construction

We are working on this content right now! Come to discover it in a short time.