Vibration damper VD13 black

The rubber holds a hardness of 55 ±5 Shore A, a medium soft version that gives noticeable damping without the machine starting to rock. The temperature range runs from -40 °C to +80 °C, which covers most things from chilled warehouses to hot machine rooms; within that range the damper handles both outdoor installation and normal process heat. The manufacturer advises against environments with oil, alkaline agents and acids. The resistance of the rubber to such media is limited, and a damper that has softened or swelled loses both load capacity and damping ability.

The height also comes into it. A taller damper gives more rubber in the working direction and therefore a lower natural frequency, which improves the isolation at low speeds, while a lower damper stands more firmly sideways and takes more shear. If the machine stands still and just hums a low model is often enough; rotating machines with imbalance, or machines that start and stop often, may need the taller one.

Typical applications we see in Swedish industry are compressors, fans, pumps, units and electric motors that have to stand still without sending vibrations on into the building. The dampers are also used the other way around: sensitive equipment such as measuring instruments, electronics cabinets and cameras is placed on dampers to be protected from vibrations from outside, and on transport carts they reduce the rattle that otherwise wears on both the load and the surroundings.

Fitting is uncomplicated. Tighten against the stop with a normal joint and lock with a nut or thread locking compound if the machine vibrates heavily. Use flat and clean contact faces; a damper standing at an angle is loaded unevenly and ages prematurely. When replacing, it pays to change all the dampers under the same machine at the same time, since old and new rubber have different stiffness. Check the dampers during ordinary maintenance, because rubber ages even without load; cracks or permanent compression mean it is time. Count on a certain amount of trimming as well: if the machine still stands restless after fitting, a softer or harder set can make a large difference, and the dampers seldom cost so much that trying your way forward is out of the question. Delivery is in packs of 10 to 200 pieces depending on size.

Vibration Damper VD13 is a rubber damper with threaded holes on both sides. The damper is fitted between a vibrating machine and its base and breaks the rigid contact; vibrations and structure borne noise that would otherwise travel straight out into frames, floors and nearby equipment are caught in the rubber instead of spreading through the building. The difference is often heard immediately once the dampers are in place; both the noise level and the wear on nearby parts drop.

With threaded holes on both sides you choose the screw length freely at each connection, which is practical when the material thickness differs between machine foot and foundation, and no studs stick out when the damper is handled or lies on the shelf in the store. The fasteners are in zinc plated steel and the body in black rubber with a matte surface.

The series covers 55 sizes with diameters from 6 to 200 mm, heights from 8 to 100 mm and threads from M3 to M20. The basic rule when sizing is to choose dampers that are compressed a little under the static weight of the machine; only then can the rubber work. A set that is too hard isolates poorly, one that is too soft lets the machine move more than it should. Spread the weight over the number of mounting points and calculate per damper, not per machine.

Do you have questions about sizing or the chemical environment? Call us before you order and we will sort it out.