homemade roll baler for hay

When you hear abouthomemade roll baler for hay, one immediately imagines a makeshift construction made from available scrap metal, which, at best, will twist a couple of loose armfuls. But the reality, especially on smaller farms, is often more complex. Many people think that the main thing is to assemble the frame and install the shaft, and then it will roll on its own. In fact, it is in the details - in adjusting the density of the roll, in the reliability of the winding unit with mesh or rope - that success or failure lies in the midst of harvesting.

From idea to the first chip: where it all begins

The first impulse is to save money. Ready-made units, even used ones, cost a lot, but here, it seems, the materials are at hand. You start looking for drawings and immediately run into discrepancies. One source talks about the mandatory hydraulic drive of the bale chamber, another says that a mechanical transmission from the tractor PTO with a chain or belt drive is sufficient. Personally, I am inclined to use hydraulics, especially for forming a dense roll that does not fall apart during transportation. But this immediately complicates the design: you need a pump, distributor, hoses. Without experience, it’s easy to get sidetracked here.

One of the key mistakes at the start is underestimating the loads. They take an ordinary channel or a corner that “looks strong”. But when baling, especially if the hay is a little damp, the pressure is enormous. The fastening points for the side walls of the chamber must be designed for variable shock loads, otherwise the structure will fail in the first winter. I remember how a friend of mine, after a month of working on his own homemade project, the weld seam on the frame came apart - we had to urgently strengthen the entire frame.

Here, by the way, it is useful to see how professionals solve these issues. Not to blindly copy, but to understand the logic. For example, studying equipment from manufacturers likeHulunbuir Machinery Manufacturing Company ?Jiujia?(their website ishttps://www.cn-fascar.ru), you see the emphasis on solid-rolled shafts and rollers in the winding units, as well as on the thoughtful geometry of the pressing chamber. This is not just “hardware”, these are engineering solutions that reduce critical stress points. Their company is likeintegrated enterprisein the field of agricultural machinery, clearly relies on field tests, and not just on drawings.

The heart of the unit: the bale chamber and the roll forming unit

This is where the fun begins, and for many, the most difficult. Camera. There are usually two options for homemade products: with a fixed roll size or with a variable diameter. The first is simpler in design - essentially a rigid cylinder with a pressing belt or chain. But it is inflexible: if you want to change the density or size, you have to physically rebuild the mechanism. The second option, with sliding belts on rollers, is much more technologically advanced, but also much more difficult to set up. You need perfect synchronization of the tension of all the belts, otherwise the roll turns out ovoid and breaks the mesh when winding.

My experience suggests that for the firsthomemadedesigns are better off going the fixed camera route. Let the diameter of the roll be, say, 1.2 or 1.5 meters - standard sizes for which it is easy to find spare parts for winding. A critical point is the material of the pressing belts. Of course, we don’t need conveyor ones, but special ones, with a polymer or rubber-cord base, resistant to abrasion and stretching. Savings here backfire: a broken belt in the field will stop all work for hours.

And they often forget about the “beginning?” bale - the moment when the first layers of hay should be securely captured and begin to rotate. Factory models have clever guide teeth or rods for this purpose. In artisanal conditions, they often simply make a smooth floor of the chamber - and then the hay slips through, especially if it is dry and short-stemmed. It is necessary to add pressure rollers at the beginning of the cycle, which again complicates the kinematics.

The winding story: rope versus net

A separate headache is the winding system. It would seem that it would be so difficult: feed the roll a rope or a net. But in practice, the feed and tension mechanism must work synchronously with the rotation of the roll, and at a variable speed (one thing is needed at the beginning of the winding, and another at the end). The most common failure in homemade products is uneven winding, when the turns lie with large gaps or, conversely, run over each other. Because of this, the roll may crumble when unloading or loading.

I experimented for a long time with both rope and mesh. Rope (polypropylene twine) is cheaper and easier to store, but requires a more precise mechanism for cutting and clamping the ends. If the knot is imperfect, the entire winding may unravel. The mesh holds the roll more reliably, especially for transportation over long distances, but its feeding mechanism is more complicated - it requires rollers to unwind the mesh roll and very sharp knives for cutting. In addition, the mesh is sensitive to distortion during refueling. Once, due to a crookedly installed roll of mesh, my entire feed unit jammed—I had to disassemble it in the field, in the rain.

Here again the difference with serial samples is visible. On the same sitecn-fascar.ruin the descriptions of their balers you see an emphasis on an automated tension and trim control system. These are precisely the “little things” that turn out to be the most important in field conditions. Theircompany, which positions itself as a full-cycle enterprise from development to service, clearly makes such decisions at the design stage, based on the mass of complaints from the field.

Drive and transmission: from PTO to hydraulics

Most do-it-yourselfers use a drive from the power take-off shaft (PTO) of the tractor. It's logical and accessible. But the PTO can be different: 540 or 1000 rpm. For this, you need to calculate the gearbox or chain drive on the main shaft of the baler. An error in calculating the gear ratio and either there will not be enough torque to bale a dense bale, or the speed will be too high, which will lead to frequent jams and hay breaks.

The hydraulic drive I mentioned gives more control. You can smoothly adjust the chamber rotation speed and pressing force directly from the tractor cabin. But this requires the installation of a separate hydraulic pump, tank, and filters. For one-time work during the season, such complexity may be excessive. However, if the farm is large and you need to make hundreds of bales in a short window of fine days, then controlling the density through hydraulics pays off in the preserved quality of the feed.

We must not forget about the cardan shaft from the tractor to the press. It must be the correct length and have proper protective covers. I saw a case where a homemade press, due to an incorrect angle of the cardan connection, was killed during the season. bearings in the gearbox. The noise and vibration were terrible, and as a result the unit became unusable. Trifle? No, it's a matter of safety and durability.

Field testing: where theory meets reality

The first trip to the field is always a stress test. Even if everything worked perfectly in the workshop. The relief, the moisture content of the hay, the presence of foreign objects (branches, stones) in the mass - all this makes adjustments. One of the common problems with homemaderound balers- clogging in narrow places. For example, in the gap between the pressing belt and the chamber wall. On flat, dry hay, everything flies, but as soon as you come across a piece of wetter stem or a bunch of weeds, winding begins, then a jam, then you need to stop and clean it manually.

Another point is unloading the finished roll. In factory devices for this purpose there is a folding back wall or belts that unclench. In home-made products, a folding side is often made on simple hinges with a manual lock. It seems simple, but when the roll weighs about 500 kg, and you are alone in the field, opening this side and preventing the roll from rolling out uncontrollably is quite a task. Some craftsmen attach simple hydraulic cylinders from a truck body to open the side using a lever from the cab. It works, but you need to accurately calculate the force so as not to break the hinges.

It is in such field conditions that you understand the value of service support and ready-made solutions. When your homemade knot breaks, you are left alone with it. And by contacting the manufacturer, for example,?Jiujia?, you can get advice and a specific spare part. Theirapproach, which combines R&D and service, looks more rational for ongoing work than permanent handicraft improvements.

Conclusions: is the game worth the candle?

So what?homemade roll baler for hayIs this a dead end? Not at all. For a craftsman with a good engineering base, access to metalworking and, most importantly, time for experiments and fine-tuning, this is a very realistic project. It will give a deep understanding of the process and, perhaps, save money at the start. But you need to clearly assess your strengths and goals.

If you need to prepare hay for two dozen heads of livestock on your personal farm, and you have an old tractor and time, you can try. But if we are talking about commercial procurement, where speed, reliability, roll density and a minimum of downtime are important, then, perhaps, it is better to consider the option of a supported factory machine or a new one from a trusted supplier. Time spent on endless modifications and repairs during the high season also costs money, and a lot of it.

Ultimately, any technology, whether homemade or industrial, is a tool. Its effectiveness is determined not only by cost, but also by how well it corresponds to the scale of the task and the ability to use it. And studying the experience of serious market players, such asHulunbuir company ?Jiujia?, even if you are not going to buy from them, provides that very missing applied engineering logic that distinguishes a pile of metal from a working agricultural unit.