There are cases when there is a need to raise some load to a height of about 1 m. For example, it can be a car failed in a ditch. Ordinary jack here can not do. In this case, we can help the High Jack Dombard. But on this region of its use does not end. In today’s article, we will analyze what kind of jack, its features and find out how they need to be able to correctly.
Rack jack has a simple design. It consists of:
- rail guide along its entire length (which depends on the model of the jack itself);
- At an equal distance there are round holes;
- Handles, when you click on which the carriage is moving and the supporting platform itself, on which the whole cargo relies.
This platform can be very low above ground level. Some models allow you to start a lift with 10 cm. The weight of the lifting load can be from 2 to 20 tons, depending on the model and device.
And for the jack of the described type there is no difference in which position it is to work – it is equally pulling both in a vertical position and in the horizontal.
Each of the devices has its own gear:
- Single-stage models can raise weight up to 6 tons.
- If the model is two-stage, the weight can reach up to 15 tons.
- Three-speed models are able to cope with the loads that reach 20 tons.
The principle of operation of such a mechanism is based on the interaction of the rail and ratchet mechanism. To raise the cargo, the lever is heading with the downgrade down. At this moment, the carriage is rearranged exactly 1 tooth on the toothed rail. To continue the rise, you need to raise the handle again at the top point and re-lower the lever. The carriage will jump over 1 tooth.
See the High Jack Rack Jack in action in the following video.
All moving elements are protected by a casing to protect the mechanism from dirt from entering it, even though the entire system may well be a vacuum in the nearest water branch. Some owners of such devices lubricate all movable oils. This is not the most successful solution for such a device. Since oil, and to be more accurate – its film collects all the dust, which only maybe, and as a result, the accumulated dirt makes it difficult to work the whole mechanism. In this case, such a substance will not be able to simply wash off with water.
The jack of the type is best to keep clean and dry.
Described jacks are favorite accessories and indispensable assistants from off-road lovers. Every self-respecting lover of such a rest is necessarily fading on his auto car jack. With it, it is possible to pull out the tightly sewn in the ditch or a kea of a multiple jeep with a full hiking snap inside. Durable construction and large sizes allow you to use a jack as an anchor if necessary to remove the machine with the help of an electrolyber. To do this, the locality where there are no trees, but there are various boulders, the jack is fixed between them, the car clings to it.
Justice It is worth noting that Rake is not designed for similar loads, Therefore, after some such events, you can see a bent roth jack. There were cases when he was managed to bend 90 degrees.
Like any tool that sooner or later have to take advantage, Such jacks have their undeniable advantages:
- Easy design and applications. This type of lifting mechanisms is very reliable and unpretentious in use. Seemingly weak design capable of withstanding major loads.
- Big lift height Allows you to pull a deeply stuck machine.
- Fast work of the mechanism. Raise the load to the desired height can be in minutes.
Of course, this will not do this tool without flaws that it is worth noting:
- Very large size. Some models exceed Length 1.5 m, so the place under the necessary device is far from each machine, but only in large SUVs.
- The small area of the support of the jack itself is forced to carry with it, the so-called “shoe”. This is a supporting area that increases the area of contact with the ground, so that under the weight of the car, the device did not die in the soil.
- Not suitable for all types of cars. The specificity of the car implies the presence of power elements of the body, which prepared jeeps have plenty (power bumpers, thresholds, various eyes), all this is not the ordinary car and hook a jack for a plastic bumper to replace the wheel will not work.
The most important rule when working with a similar jack is safety. In the shortcomings, this moment was not just like that. Raised on such a jack the car is extremely unstable, so it is categorically under it, no circumstances cannot be closed. In addition, very often the car breaks down from the jack, in this regard, there is such a concept as the “Haygek Fall Zone”, the hit in which life is dangerous.
If the machine is dropped, and the jack is in the clamping state, then its handle starts to ride with a huge speed and the most important thing – by force. It is impossible to stop her hands, and most injuries (knocked out teeth, broken jaws, broken ribs and limbs) occurs at this moment.
If this happens, let the mechanism itself reset the excessive load, and it will stop himself.
Among the rickens of jacks it is worth highlighting the most popular and high-quality models.
- “AUTODELE”. Rack jack, used for lifting cars and moving various goods. The work of the step mechanism begins with a load from 50 kg. The most affordable jack of all top budget models.
- Farm Jack FJ150. Production is located in the USA. It has a large area of use in which the clamp includes, pushing and tightening various goods. This model has a rail height of 150 cm, maximum load capacity 3 t. The described model has a large set of additional accessories.
- Magnus-Profi (Czech Republic). This Rack hi-lift jack is fully made of high quality steel. Its height is 1520 mm. The weight of the whole aggregate is 12.5 kg. High Quality Jack is intended for not very large and high cars.
How to use
The described type of jack is not so many movable parts. Among them, the mobile carriage on which the lever is located, and the directional direction mechanism. They are only 2: up and down. The mechanism itself is quite tight and switches not smoothly tension, but a sharp blow.
When the mechanism is in position down, and the handle is fixed, then the carriage is fluently moving across the rake. If the position is put up on the mechanism, the carriage works on the principle of a reverse key and moves with the characteristic crackle only up the rail. It is necessary in order to quickly prepare a jack for work.
Before the start, it is necessary to set the right corner of the jack relative to the machine. It cannot be put strictly perpendicular to the earth, if you need to rise to a large height. During the lifting of the car, the jack will strive to lean in her direction and can slip out and damage the car. Therefore, the jack must be tilted a little in the opposite side of the car. When you finished the rise, be sure to fold the handle.
To lower the car, you need to switch the direction mechanism to the descent, At the same time, the handle must be fixed in parallel rake. At this moment and all the most interesting and dangerous. When you raise the car, thereby gradually increasing the effort attached to the handle. At the moment of lowering, everything happens exactly the opposite. When the lever is at an angle of 90 degrees to the rail, and the mechanism is shaken at 1 hole, the lever releases the energy in the reverse order (from more to the smaller). That is, at this moment you need to be the most attentive and ready for a possible popping handle.
During work, remember that A similar jack is a thing with which you need to be able to work to keep your health. You can not keep a free hand for the “open grip” rail, that is, that your thumb is on the way of the bounced handle. Returning force of the handle is directly proportional to the load on the heel of the jack.
In case of slipping right hand from the handle, during pressing, she will hit the inertia on the rail. If there will be a thumb on her way, then the probability is not just a fracture, but a complete fragmentation of the bone. The same applies to the head of the operator. Invalid the head of the head on the trajectory of the rebound of the handle.
The opinions of buyers about this modern equipment are the most different, But most often users are satisfied with the purchased goods, because it is pretty specific – its area of use involves certain conditions and the skills of the person who has not every car enthusiast. The ability to repair and common parts allow you to use a product for a very long time.
Details subjected to rapid wear change very easily. These are the factors that were pleasantly surprised by many users who decided to enjoy similar varieties of jacks.
Marked by buyers and impressive appearance. When such a “monster” is placed on a spare wheel or on the top trunk, the car acquires a view of the all-terrain costs prepared for expeditions, even if the rest of the attached equipment is very small. Operation of such devices can be dangerous if they act wrong. This fact scares some users who are little familiar with these jacks.
More detailed and visual overview of the work of High Jack’s rush jacks is presented in the following video.