How to choose a vibratory rammer: professional advice

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The vibratory rammer is an effective tool used for earthworks. How to choose the right rammer without overpaying for excess power and special features? This article will tell you about it..

Practically all types of earthworks require soil compaction. This may be necessary at different depths, but in most cases the soil is compacted at the surface.

According to the device, there are mainly three types of rammers:

  • hydraulic
  • electrical
  • ICE based (diesel and gasoline)

Hydraulic rammers are powerful industrial devices, sometimes part of the equipment of excavators, therefore they are not considered in this article.

The principle of operation common for all devices is to transfer the torque of the rotor of the electric motor or the crankshaft of the internal combustion engine to a vibrating device (VU), fixed on a steel platform.

Varieties by type of drive

ICE

The main advantage of this option is autonomy. This makes it indispensable in the field. However, it has a much larger number of parts compared to an electric drive, therefore it is inferior to it in reliability. The large comparative weight is a plus during operation, but it is inconvenient for delivery and unloading (manually). Diesel vehicles are the most powerful and heavy, but at the same time they are the noisiest, most expensive and less environmentally friendly (not suitable for closed rooms). Gasoline is lighter, quieter and “cleaner”, but inferior to diesel in terms of impact force.

How to choose a vibratory rammer. Professional advice

Electric motor

Simple and reliable design. In case of failure, a complete replacement is possible in a short time. The noise level is the lowest. Main disadvantage: mains supply.

How to choose a vibratory rammer. Professional advice

It is also worth noting that devices equipped with internal combustion engines are traditionally more expensive than electric ones..

Varieties by design

Vibrating plate

The engine and VU are assembled on a steel plate with edges bent upwards. Slab sizes from 300×500 mm to 800×1200 mm. Controlled with a yoke. Vibratory plates are of direct course and reversible (can move backward). They have a low amplitude and high vibration frequency. Ideal for flattening and even compaction. It is the uniformity of properties over the entire area of ​​the compacted soil that is the main advantage of this design. This is of particular importance in the construction of road surfaces, sites.

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How to choose a vibratory rammer. Professional advice

“Vibroleg”

The engine is mounted on top and fixed to the VU. The VU is the vertical part of the “leg”, has a height of about 60 cm and is fixed, in turn, on a steel plate. The dimensions of the slab, as a rule, do not exceed 400×400 mm. It has a large amplitude (up to 70 mm) and a low vibration frequency. Force is transmitted by compressing and firing a powerful steel spring in the leg structure. Advantage: maximum impact during ramming due to the relatively small contact area. This allows you to reach the limit values ​​of the density of the processed layer.

How to choose a vibratory rammer. Professional advice

A common feature of both types is the use of the mass of the entire device to create kinetic force during operation.

Application area

About 70% of all soil compaction work is carried out using relatively lightweight, mobile and maneuverable manual vibratory rammers. Unpretentious to weather conditions, simple in design, maintainable, they are suitable for “wet” ramming (with soil wetting). They are not used except for underwater work..

Model overview

When choosing a rammer for your own use, you should proceed from the needs. First, decide what work is to be done. Since diesel rammers are more suitable for industrial construction sites, consider units with gasoline internal combustion engines.

Gasoline “vibration feet”:

Firm, model Manufacturer Impact force, kN Plate dimensions, mm Productivity, m2/hour Weight, kg Engine Price, rub.
Mikasa MTX-70 Japan 13.5 255×330 150-180 70 HONDA GX 160, 5.5 L. from. 120,000
AGT CV65H Germany 13 280×330 130-160 65 HONDA GX100, 3.1 HP. 80,000
Ingersoll Rand RX-264H USA ten 230×330 150-180 60 HONDA GX100, 3.1 L from. 75000
BIEDRONKA UW8010K Poland ten 340×285 180-230 77 HONDA GX 160, 5.5 L. from. 55000
Centaur VT-95 China 7.5 275×330 100-120 110 VR-77VT95, 2T 2.5 l. from. 35000
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Gasoline Vibratory Plates:

Model Manufacturer Impact force, kN Plate size, mm Travel speed, m / min Weight, kg Engine Price, rub.
AGT PC70RPV Germany 15.1 375×516 25 70 HONDA GX120, 4 HP from. 65000
Ingersoll Rand BX-60WH USA 13.5 430×565 25 70 HONDA GX100, 3.1 L from. 60,000
BIEDRONKA PW9220K Poland 20 600×460 22 92 HONDA GX 160, 5.5 L. from. 40,000
Scheppach PC 13 Germany 13 550×420 15 87 HONDA GX 180, 6.5 L. from. 21000
Centaur VP40 China 10.3 410×280 18 55 VR-77VP40 2T, 2.5 l. from. 15000

It should be noted that each model has several varieties in terms of power..

The main points of the characteristics and guidelines for choosing the best option will be the size of the plate (and the entire unit) and the impact force (depending on the engine power). A set of additional functions: adjustment of vibration amplitude and impact force, reverse motion and others need to be clarified for each specific model. The common indicator for all the given manual rammers is the working depth of the layer – 30–35 cm. With similar characteristics, the origin of the machine can greatly affect the difference in price. For obvious reasons, prices for any goods produced in the EU, the USA and Japan are traditionally an order of magnitude higher than prices for goods from Asia and Russia.

Mikasa MTX-70 Mikasa MTX-70

The power characteristics of the motor of devices with electric drive will be similar (power 2-4 kW), but the weight and price are 15-20% lower.

In simple terms: a professional who earns money by excavating every day needs a powerful, reliable tool with a large resource. Such a device will be durable, but also expensive. For one-off or rare use with small volumes and careful handling, a cheap model is also suitable.

Diy vibratory rammer

The most economical option for home craftsmen is, of course, a device of their own production. It is quite possible to independently make a vibrating plate on an electric drive for the needs of the site. To do this, you need the following:

  • platform vibrator IV-98, 220 V (sold assembled);
  • 1 m of steel profile (for example, channel or I-beam 75 mm);
  • steel sheet from 8 mm thick and approximately 45×80 cm in size;
  • pipe 20 mm for making a handle (1.5 m);
  • 10 pairs of M12 bolt / nut with grovers or washers with rubber band.
  • the wire.
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You will also need a welding machine (4 electrodes), a grinder, and other hand tools.

Operating procedure:

  1. Plate making. We make folds along the two short edges. We make a cut with a grinder 3-4 mm at 40 mm from the edge. We bend it so that the edges of the cut come together. Boil the cut.
  2. Engine seat. We weld the profiles to the plate so that you can then attach the engine to them.

How to choose a vibratory rammer. Professional advice

  1. We mark the profile for the engine mounting lugs. We weld the bolts in these places in the form of studs.
  2. We install the engine on the welded bolts and fix it with nuts with a grover. Attention! There should be no shock absorbers between the vibrator and the plate.
  3. We bend the pipe in a convenient shape and fasten it to the bent board of the slab with bolts or welding
  4. We connect the power wire.

How to choose a vibratory rammer. Professional advice

Of course, it is inappropriate to compare the technical characteristics of a home-made device with factory cars, but such a rammer will quite master a 10-15 cm layer of a given quality. Manufacturing costs are minimal – everything can be purchased on the market, assembled in 1 day.

Soil compaction work in a country house or a summer cottage cooperative is an infrequent but regular phenomenon. It can be expensive to purchase even a cheap model on your own. A way out of the situation may be to rent a device with an operator to carry out specific work, or to buy it together. In any case, to neglect the strengthening of the soil “out of economy” means to lay the problem in the very foundation of a future building or landscape.

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