Manufacture of Knott axles for light trailers, spring axle, spring suspension, axles for spring suspension.

Brake and non-brake axles with a load capacity of up to 5 tons manufactured by AL-KO Knott.

One of the most important parts of the trailer design is the suspension. Naturally, people often face the problem right choice her type. That is why in this article we want to discuss an issue that will help all trailer owners. Which axle for the trailer to choose - torsion bar or spring?

Many buyers do not fully understand the difference between torsion bar (rubber-harness) and spring suspension. But each of them has its own characteristics that affect the operation of the trailer. After all, the load on the suspension is constant.

Torsion axle device

The torsion bar suspension has a fairly simple design, thanks to which it can be used for a long time without problems. You just need to monitor the condition of the wheel bearings. The torsion bar consists of a polygonal tube, inside of which there is another tube. She is not allowed to turn around with special harnesses made of rubber. The inner tube is connected to the levers to which the wheels are attached. The great advantage of a torsion axle is that all its moving parts are hidden and do not require maintenance.

Advantages of torsion axles

• simple and reliable design;
• light weight;
• ease of installation - it is ensured by the fact that all elements are mounted in the axle beam and in the end you only have to fasten the beam to the trailer spars with just 4-6 bolts;
• unpretentiousness in operation - the torsion axle does not require maintenance;
• maintainability - almost all elements of the axle can be replaced, but in order to get the lever out of the beam and then press it back in, you will need specialized equipment.

There is a large selection of such axes in the online store https://pragmatec.com.ua/, where you can also consult with a specialist who will help you make a choice and buy a quality product.

Disadvantages of torsion axles

• short travel, which can cause the axle to bounce on bad roads;
• not suitable for heavy loads;
• rather high price.

Spring axle device

The spring suspension for the trailer, unlike the torsion bar, is able to cope with high loads. It is more rigid, long-stroke and reliable. The leaf spring suspension is perfect for agricultural applications.

Benefits of spring axles

• high endurance and strength;
• high stability on bad roads.

Disadvantages of spring axles

• the need for service;
• less ground clearance than the torsion axle;
• spring axles are more difficult to install.

Which axle for the trailer to choose in your case? It is difficult to find the ideal solution and the opinions of experts on this issue differ. Some believe that to ride on good roads A torsion bar suspension would work just fine. But if you know for sure that the trailer will have to cope with heavy loads, it is better to give preference to the spring.

Both spring and torsion axles for trailers are widely represented on the Ukrainian market. The best option for price and quality, it is better to look in specialized online stores. In particular, you will find a wide range of accessories for trailers by visiting the pragmatec.com.ua resource.

We wish you an easy choice and trouble-free operation of your trailer!

Hello! In our country there are many craftsmen who prefer to do everything with their own hands. Some even assemble an axle for a light trailer on their own. That is why we are going to talk about this topic today.

Before you start assembling your trailer element for cars, I advise you to decide on the choice of design. They are different, which brings some differences to the device.

With a little work with the hub, springs, shock absorbers and other components, you can get a great homemade axle, and a trailer with a dependent or independent suspension will demonstrate performance no worse than factory models.

Design Options

For some, it is easier to order a complete axle assembly than to assemble something yourself. But if you know how to do it or want to understand how all this is made by hand, I suggest you just buy or find the appropriate parts and assemble a full-fledged axle from them.

But what? The trailer axle, as a suspension element, is just a pipe. It is of two types, depending on the section:

• round;
• square.

If we take identical parameters for wall thickness, cross-sectional area and diameter, then square versions will require more effort to bend. That is, they are stronger than round ones.

Also, the axle assembly comes with a hub and brakes (not everywhere). Basically, 2 types of hubs are used:

• chamomile;
• hub block.

The price and repairability is better with chamomile, although block hubs are more reliable and durable at a higher price. You can only change them as a whole. I don’t see anything wrong with this, since it simplifies the replacement procedure and maintenance of the trailer.

The hubs are welded or screwed. The last connection method is actively used on . Accordingly, between welded and prefabricated construction, I would prefer the latter due to the easier approach to repair and maintenance. But it's up to you.

On trucks and less often on cars trailers can go with a pivot axle, where the entire axle rotates on a vertical axis with the help of a pivot turntable.

The suspension or axle used on trailers is:

• torsion bar (with and without brakes);
• spring (with and without brakes).

We will consider them in more detail.

Spring and torsion

Torsion models are now very in demand and popular. This can be explained by objective advantages:

• serve for a long time;
• there are no difficulties in operation;
• simple maintenance;
• it is not necessary to use shock absorbers;
• are small in size;
• the space between the axle and the frame is reduced;
• have a small mass;
• These are designs with independent suspension at the trailer wheels.

Torsion or rubber band structures are equipped with a rigid mount with a frame. There is a polygonal pipe mounted to the frame, inside of which there is a pipe of a similar shape, only with a smaller diameter. The free space between them is filled with special rubber bands. They allow you to ensure the immobility of the inner tube connected to the wheel.

I would not buy such a suspension among second-hand options. Used or used ones already have a noticeably reduced resource, since the long service life directly depends on the condition of the harnesses.

Plus, rubber harness models are not suitable for active use in harsh conditions. This is an option for those who are going to operate the trailer mainly in the city and on relatively smooth asphalt.

If the operating conditions are harsh, then it makes sense to make or buy a spring-type axle that is more resistant to loads. She is not afraid of serious overloads due to the longer stroke compared to her torsion counterpart. But keep in mind that you will have to take care of the spring suspension more carefully and more often.

Spring, as well as a torsion axle variation, access in Voronezh, in Belarus, it can be bought in Moscow, St. Petersburg, contact Chelyabinsk or Kyiv. It doesn't matter where you live. Now the width of the assortment is so limitless that ordering a suspension assembly or accessories for self-manufacturing, is not difficult.

I already wrote about the spring suspension, so I advise you to follow the link and read.

After all, it is also important to collect something from which to make an axis and put it on your own light trailer. I advise you to pay attention to the components from Al Ko.

Self-assembly of the structure

Let's assume that you already have a trailer frame and you have chosen for yourself.

Now you need to figure out how all this is assembled and turned into a full-fledged axis as a structural element of your car trailer. Let's look at a few key steps.

• To begin with, the beam itself is selected. With a round or square section, it will be, it does not matter. The main thing is that you take the appropriate dimensions and use metal High Quality. Otherwise, the suspension will not last long;
• Next, we take the hub axle, on which the hub itself will be installed, and connect it to the pipe. How to join these two elements? It will be ideal if the hub axle enters at least a few millimeters with its protrusion inside the pipe. There are more chances for a round section than a square one. Then it's all welded or bolted together. learn from Kurgan trailers if you want to make a collapsible model. If not, just weld the elements together with high quality. This is done on both sides;

• So you have a full-fledged axle ready, to which a spring or torsion bar will then be mounted;
• According to current regulations, the trailer axle is mounted to a length corresponding to 40% of the total length of the trailer on the rear side;
• Precisely make replacements, designate a place to place your axle;
• Installation is best done from above, that is, the trailer will have to be turned over and placed on a flat surface. Make sure that the spindles hang freely and do not interfere with your work;
• Clean out the section of the frame of the future trailer where you will mount your axle. Take a measurement of the distance between the bushings and divide into two identical parts. Don't forget to mark everything with a marker on the axis;

• For a control measurement, divide the frame width by 2, and apply the resulting value from the center of the axle. The position is corrected in parallel. Only now proceed to the final installation process;
• The connection is carried out by spot welding along the entire length of the contacts.

Many craftsmen It is advised to take a spring-damping type suspension. Although its strength parameters are lower when compared with the rubber-string design, but with such a suspension you will get a smoother and softer ride when the trailer is empty and loaded.

How difficult this process, judge for yourself. If you have never done such work, then I would not advise starting from this stage. It’s easier to buy a finished structure or initially take a good factory trailer like:

• etc.

Thank you all for your attention! Operate only reliable and serviceable equipment, do not endanger yourself and other road users on the road.

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