OMS Crane Suspended Vibratory Hammer - SVR 50 NF

What is Vibratory Hammer?

Learn «What is Vibratory Hammer» from a Vibro Hammer Manufacturer!

What is Vibratory Hammer

What is Vibratory Hammer

As a vibro hammer manufacturer we will talk about “vibro hammer; what is vibratory hammer and how does it work” in this article.

Everyone knows what vibration is. In its simplest form, vibration can be considered to be the oscillation or repetitive motion of an object around an equilibrium position. The word comes from Latin word “vibrationem” which means «shaking, brandishing». Now that we have looked over vibration concept, let us pass to vibratory hammer technology.

What is Vibro Hammer?

To begin with, let us make you familiar with concept of vibro hammer, areas of its use and advantages. Vibro hammer is a machine used to drive piles in/out of the ground for constructing structures like bridges, harbors, roads, airports, canal works and so on. They are quiet and have many advantages compared to traditional pile drivers which use a large weight to strike the pile. As an example, the greatest advantage is that vibratory hammers can drive and extract piles much faster. Beside this, they are small and light weight, environmental friendly and they can be used under water. Moreover, in some vibratory hammers vibration can be fully controlled, which is a necessity if the work has to be carried out in residential or historical places.

Vibratory hammers use spinning counter-weights to create vibration to the pile. Resistance of the ground is reduced with vibration and by changing the formation of the ground. The vibratory piling machine transfers vertical vibrations to the pile via the hydraulic clamp. This in turn, transfers vibration to the ground which reduces the friction between the pile and the ground. In other words, the high-speed vibration causes the soil to actually «liquefy» allowing the pile to be driven or extracted with less force. The pile is driven into the ground by a combination of the vibrator’s weight and centrifugal force it creates.

Vibratory pile driving machine has four main components:

  1. Vibration Suppressor,
  2. Vibration Case,
  3. Hydraulic Clamp and
  4. Power Unit.
Main Components of Vibratory Hammer

Main Components of Vibratory Hammer



The vibration suppressor assembly is mounted to the top of the vibration case to isolate vibration to crane and permit pile extraction.

Vibration Suppressor of Vibratory Hammer

Vibration Suppressor



The vibration case contains high amplitude eccentric weights cast in one piece with gear which rotate in a vertical plane to create vibration. The eccentric weights are driven by hydraulic motors mounted on the vibration case. The motors and eccentrics are all gear connected to maintain proper synchronization.

The eccentrics and motor shafts are mounted in heavy-duty cylindrical bearing. The gear and bearing lubrication is provided by the radiator located in the Power Unit. There are oil pumps, installed to vibration case, circulating the oil between vibration case and radiator to reduce the oil heat in the vibration case.

Vibration Case of Vibratory Hammer

Vibration Case of Vibratory Hammer



Hydraulic clamp is the part of the Vibrator which grips pile or tube. It contains two gripping jaws. One is “fixed” and one is “moveable”. Movable jaw is operated by the cylinder located in the clamp body. There is a check valve on the clamp which keeps jaws closed in any kind of emergency.



Vibratory hammers are powered by the power unit. For excavator mounted hammers power unit is the excavator itself. For crane suspended hammers there is a power unit which is connected to the hammer by hydraulic hoses. There is a diesel engine inside the power unit which drives hydraulic pumps that create hydraulic pressure to operator vibro hammer. The diesel engine is mounted to a tubular frame that also serves as a diesel fuel tank. There are also emergency stop buttons on the machine.

Power Unit

OMS Power Units

If you are interested in vibro hammer manufacturer you may also want to learn about production process of vibro hammer in our manufacturing facility. Using our 30 years experience in this field we can perform special design and production to meet customers’ needs and requests.

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