Assembling milling cutters of a walk-behind tractor with 4 knives
Saber cutter and its assembly
Before assembling cutters on a uniaxial tractor, you need to understand well the concept of a motor cultivator. This is a welded frame made of pipes with a diameter of at least 23 mm with a fuel tank and an engine installed on it. They are fixed to the frame with brackets. The engine is otherwise called the power unit. It is equipped with a gearbox and clutch mechanism. Each cultivator brand has its own power unit with different power.
Will a chain work as a blade on a brush cutter?
Most often, the cutter has a saber shape. Such a scheme is the most popular these days, therefore it is also called standard. The effectiveness of saber knives has been proven for many years of use on soils of different composition. The installation of such cutters on a single axle tractor allows you to perform a variety of jobs. The strength of knives made from carbon steel is very high. The cutter design is collapsible. Each knife is heat-hardened by high-frequency currents during the manufacturing process.
How is the assembly of milling cutters for walk-behind tractors? Any milling cutter consists of 2 blocks. Each of them contains 12 cutters. The block consists of 3 nodes. Each node is 4 legs at right angles (image). They are located at an angle of 30 ° relative to each other. Each knife is made of 5mm thick steel. They are attached to the post, which is made of a corner measuring 63×40 mm. The other end of the post is welded to the flange so that 4 knives are joined together. All parts of the cutter are connected to each other with bolts, washers and flanges. This design is very reliable. She is able to withstand quite high loads. If you plan to use the cultivator constantly, it is better to install a factory-made cutter.
In the process of installing the cutter on a uniaxial tractor, some craftsmen have difficulties. Therefore, it is recommended that you do this work together. The assembly is usually done on specially made wooden tragus with a height of about 50 cm. They help to cope with the work faster. the single-axle tractor rests neatly on the coulter and tilts about 45 °. Tragus is placed under the steering handle. In this position, the wheels are removed from the walk-behind tractor and cutters are installed (image). On the outer ends on the right and left, you need to install the plates on the cutters for the walk-behind tractor. They improve the performance of the unit, make it run more stable and smoother.
Очередная замена ножей на фрезе мотоблока после целины. Или влез в целину готовься к ремонту фрез
How to assemble the right cutters on a uniaxial tractor?
Do-it-yourself cutter assembly should be carried out as correctly as possible. And here it is especially important to make sure that the active part crashes into the ground during operation. For this, it is initially recommended to study the drawings, and then proceed to the manufacture of equipment. The following tools are required to create cutters:
- The rotor axis of the required length. It can be divided into two parts if you need to assemble a cutter from two blocks.
- Short axis.
- Reducer with clamps.
- Left and right knives.
- Bolts, washers, nuts.
Assembling the structure does not take more than an hour, but here it is important to install the knives so that they do not interfere with the rotation.
- Long rotor axis equipped with 30 degree knives.
- It is necessary to combine four knives on one block, fixing them to the gearboxes.
- Next, the correctness of the design is checked and all fasteners are tightened.
This design is very reliable and can withstand quite high loads.
Which cutters are best for a walk-behind tractor?
Such “knives” for tillage can be roughly divided into two large groups. Each of them has its own characteristics and is suitable for a certain type of work.
Crow’s feet milling cutter
This product is younger and more modern. It is mainly used for working on hard ground. It is recommended to work only on weed-free soil and on level ground. Even with the onset of cold weather, the work results are very good. How to assemble a crow’s feet cutter? Some tools and materials need to be prepared:
- a metal tube with a diameter of 42 mm;
- details for loosening the soil;
- welding machine;
- angle grinder with discs.
Rippers can be based on old vehicle springs. They are cut into pieces of the desired length and welded to the tube as the base. The edges of the knives are sharpened and welded to this tube as well. After assembling the entire mechanism, a test run is performed. During it, the necessary adjustments are made. When starting the walk-behind tractor, the cutter blades should hang in the air without touching the ground. You need to lower them slowly. Only then will the cutter work for a long time.
Making crow’s feet requires some training in metalworking. Knives need to be forged, and this is far from being possible for every owner of the unit. If the system is not assembled properly, it may break down. The construction of the crow’s feet is non-separable. This gives it extra strength. Product characteristics:
- weight. about 16 kg;
- working speed of movement. 2-5 km / h;
- assembly width. 41 cm;
- length and height. 38 cm.
Self-sharpening knives. With careful work, they no longer require sharpening. In this case, you need to place the edges of the petal correctly. They must enter the ground with a sharp end. With the correct adjustment of the knives, the ground is plowed to a depth of 30 cm.To achieve this result, they first pass along the site, then across.
Instructions for assembling a cutter for a walk-behind tractor
You bought a single-axle tractor or cultivator. The first question that arises is how to assemble it. It is not difficult to screw the knobs and put the wheels, even if this is your first time. But to assemble the working tool CULTIVATORY MILLS is not so easy as it seems at first glance.
In our instructions, we show how to properly install the knives on the hubs of a walk-behind tractor or cultivator.
Look carefully as shown in the picture and do the same.
a single-axle tractor today is a popular tool on the site. Assembling a milling cutter for a walk-behind tractor is an important point in preparation for cultivating the land. The most common cutters are saber knives (image), as well as devices called crow’s feet (image). These devices are easily assembled on a walk-behind tractor. They carry out most of the agricultural work on the land. They have to be changed very rarely. This significantly reduces the time spent on maintenance of the walk-behind tractor.
Installation of cutters on a uniaxial tractor
To install the cutters on a single-axle tractor, use special wooden trestles, the height of which should be about 50 cm. The machine must be supported on the opener and tilted at an angle of 45 degrees. Then the wheels are removed from it and cutters are put on. Special plates are installed on the outer ends on both sides, which make the unit run smoother and more stable.
Homemade milling cutters for walk-behind tractor
Manufacturers offer different options for tillers for the walk-behind tractor. You can use one set of cutters or purchase two different types of devices, changing them depending on the conditions of soil cultivation.
Some craftsmen prefer to use homemade products, which, when properly assembled, will be no worse than factory ones.
The main advantage of self-creation of a rotary cutter is that it can be adjusted to the specific features of the site.
Factory cutters with saber knives
Those who start using walk-behind tractors ask the question: which knives are best to take? Types of motor-cultivators can be conditionally combined into 2 large groups:
Saber cutters are best suited for all types of work.
- knives called “crow’s feet”
- saber cutters.
The saber-shaped form of cutters is the most popular, it is these schemes that are called standard. They are effective, the effectiveness of this type of use has been proven for decades. Often the cultivators with which the milling cutters come in the kit are precisely saber-shaped. It is most suitable for any type of work. The advantages that saber cutters have are obvious. The shape of the knives is optimal. They are suitable for various types of work. For the manufacture of knives, only carbon high-quality steel is used, the strength of which is high.
The saber cutters are collapsible, making installation and maintenance simple and efficient. The steel from which the knives are made is not at all susceptible to welding. To improve the mechanical properties of the product, a so-called thermal hardening is used during production. Steel is treated with high-frequency currents for strength.
Why and how to make homemade cutters with your own hands from a walk-behind tractor
Despite the fact that walk-behind tractors are sold complete with cutters, sometimes it becomes necessary to make cutters for a walk-behind tractor with your own hands, this is due to the fact that sometimes you need to do work with a walk-behind tractor, which is done using specialized cutters that are not on sale.
The second option is more laborious, however, such a cutter will cost only a small amount of time spent, and the very cost of the material for the cutter.
It is best to divide the manufacture of a milling cutter for a walk-behind tractor with your own hands, into the following stages.
The first thing to do is to think over the design and functionality of the cutter. To do this, it is best to familiarize yourself with analogues. After all, you need to take into account even the smallest details in the design so that it is functional and safe. If this is not the case, then the milling cutter may simply be a waste of time, because it will not do the necessary work.
The most difficult thing is to assemble a ready-made cutter, because from a pile of spare parts, you need to make a normally working cutter, and not everyone can do it. After all, the cutter must be assembled strictly according to the drawings, and so that there are no deviations in the design, because then the cutter will be constantly pulled to the side, and this will greatly complicate the work with it.
The last thing to do is do a field test and see how the cutter works. If the need arises, then you need to slightly redo the cutter so that it does the necessary work.
In the video you can see how homemade cultivator cutters work:
Although the independent production of a cutter is a rather long and painstaking process, it completely pays for itself, because the cutter will do the necessary work one hundred percent. That is why craftsmen make new designs of homemade cutters every year.
How to make do-it-yourself cutters for a walk-behind tractor
The first motoblocks produced in the USSR were “Moles” with a capacity of 2 hp. They were equipped with cutters d 310-350 mm, with a depth of soil cultivation 150-180 mm. Currently, motoblocks are already being made with a capacity of 4-6 hp. and cutters for them are still produced in “Krotovsky” size. As a result, the tillage width does not correspond to the engine power, and this significantly reduces the productivity of the walk-behind tractor, and the tillage depth is less than that of a shovel bayonet. These shortcomings are inherent not only in my Salyut walk-behind tractor, but, I am sure, in many others.
To fix them, I made cutters with a diameter of up to 500 mm, which allow you to go deep into the soil by 250-280 mm and work it up to 1 m in width in one pass. the single axle tractor has been doing great work for 8 years now without giving me any problems.
Cutters. thanks to the saber shape, they are safer to work with. When hitting a stone or root, they raise the uniaxial tractor and, as it were, roll over an obstacle, in the manner of a car wheel, continuing the processing further. While the straight cutters cling to the obstacle, overturning the single-axle tractor, which pulls the operator with it. Doing so can cause you to lose balance and fall onto the cutters, which could result in serious injury.
The plates to which the knives are attached are welded to the shafts at various angles so that the cutters enter the soil one by one, smoothly and without impact. This has a beneficial effect on the transmission of the walk-behind tractor. The knives are made from carbon steel. If you have a forge, they can be made from a suitable spring. For the rest of the parts, use ordinary steels of the St-10, St-20, St-25 grades, which are well weldable. The knife template is made of steel with a thickness of 1.1.5 mm. To facilitate manufacturing, I give its sketch on the “grid”, which will allow you to draw the workpiece by cells.
How to assemble a sturdy cutter for a single axle tractor?
uniaxial tractor is the equipment in demand in agriculture. How to assemble a milling cutter on a uniaxial tractor and prepare the soil for sowing on your own personal plot?
uniaxial tractor is an equipment that is designed to perform various agricultural operations.
You must first familiarize yourself with the design of the walk-behind tractor in order to assemble it in the shortest possible time. Most often, saber knives and “crow’s feet” are used for assembly. They are convenient, allow you to perform a significant part of the work without replacing the cutter. As a result, maintenance time and costs are reduced.
Walk-behind tractor design
Before the assembly of the cutter begins, you need to figure out what the cultivator is and what is included in it. The top of the frame is usually welded. A fuel tank and an engine are installed here. Fastening is carried out on brackets. The engine itself, or the power unit, is equipped with a clutch and gearbox. Its power may be different, it all depends on the type and purpose of the cultivator.
The cutters are a scheme of 2 blocks, each containing 12 separate cutters. For each block, 3 separate units with 4 knives are used, which are mounted at an angle of 90 °. The position of the nodes is offset by 30 °. For the manufacture of one knife, a steel sheet is used, the thickness of which is 5 mm. The stand is made from a metal corner of 6340 mm. The knives are attached to the rack, their other end is welded to the flange to combine 4 knives into one structure. The entire cutter is connected with bolts, washers, flanges. The design turns out to be reliable, it is able to withstand significant loads. If you plan to permanently use this equipment, then you should prefer only the factory options.
Cutter assembly diagram
In photo 1, the design, features of the cutter are clearly visible. The scheme is simple, but before you start using the equipment, you should carefully familiarize yourself with it.
The cutter design includes elements such as:
- rotor axis, which can have different lengths (it can be single or divided into 2 parts, i.e. the cutter will be assembled from 2 parts)
- short rotor axis
- so-called pin equipped with a retainer
- right and left knives
- nuts, bolts, washers, which are necessary to fasten the entire structure.
Direction of rotation is counterclockwise. Tillers of any type are self-sharpening tools, no additional sharpening is required. Sharpening should not be used unnecessarily, it can ruin the structure.
During the installation of the cutter, difficulties may arise; such work is not recommended to be carried out alone.
For assembly, special X-shaped tragus made of wood are used, the height of which is about 50 cm.This allows you to quickly and easily put the wheels on the structure.
Before assembly, a single-axle tractor should be carefully supported on the coulter and then tilted approximately 45 °. Tragus made of wood are usually boards that knock together in the middle in an X-shaped position, are substituted under the existing steering wheel. After that, the wheel of the walk-behind tractor is removed, cutters of the selected size are placed.