How to put a bicycle sprocket on a chainsaw. How to install a motor on a bicycle: installation and step-by-step instructions. Making a motorbike with your own hands

A MOPEDE FROM A CHAINSAW I have always been interested in homemade chainsaw crafts. A couple of years ago I wanted to check if it was true that from a chainsaw motor and small wheels you can build a functional moped that fits in the trunk (at that time - BMV518). I found an excellent motor with a gearbox from a Friendship saw, wheels from a Vyatka scooter, a piece of 20x20 pipe and part of a moped frame. It happened in a couple of evenings. In order for the engine to start and run, I replaced the carburetor with a moped carburetor from D6. The result exceeded all expectations - a simple and reliable toy entertained my friends all summer. Last spring, I realized that simply repairing a moped was no longer interesting and, wanting to lighten the design, I made some changes. It turned out to be even more fun. And now I’ve exchanged this already tired moped for a complete Malaguti Grizzly 12. I want to push in a more powerful motor, we’ll see... I’ll try a motor from a partner chainsaw. Or, as a last resort, from a Stihl 180 chainsaw.

Pegasus moped and its features

The Pegasus moped attracts attention, first of all, with its fairly low price, and to be honest, the quality of this model almost matches its price. However, Pegasus managed to find its fans, mainly due to its ease of operation.

Pegasus is produced at the Leningrad Northern Plant. This factory specializes in the production of scooters. The model is equipped with a two-stroke 49 cm3 engine AnkurCM-50 of Indian manufacturers with a power of 2.4 horsepower. The power is certainly not great... they are barely enough to reach a speed of up to 45 km/h. And finally, this becomes completely impossible. The moped engine runs on a mixture of A-92 gasoline and SAE-30O oil. Fuel consumption is about 1.5 liters per 100 km. A special feature of the model is the absence of pedals; thanks to the kickstarter, the moped starts without much effort.

The suspension is quite decent for such a small device. The hydraulics are of decent quality, also of Indian origin, and even on difficult roads it does not create much discomfort for the driver.

The clutch is automatic centrifugal.

The levers and switches are also Indian, quite neat in appearance, but their location is rather unusual.

The Pegasus seat may not be particularly aesthetically pleasing, but it is quite comfortable and soft. The moped has drum brakes and spoked wheels.

The disadvantages of the moped include the presence of only one rear-view mirror, which turns out to be a difficult task to adjust, as well as the absence of a central stand.

In general, the Pegasus moped is a device that fully justifies its low price.

How to properly install a chainsaw motor on a bicycle

You will need

Chainsaw motor
Pulleys
Fastening elements
Switches and electrical wires

Instructions

Get ready for the fact that you will have to spend a lot of effort and show engineering ingenuity to achieve your goal. First, check the reliability of the bicycle, while keeping in mind that when installing a motor on it, additional load will be required on all its parts. All moving parts must be lubricated. After selecting the motor, before dismantling, it is necessary to check the engine for noise level and its performance. In addition, it is necessary to select the engine according to power, for example, a bicycle with a 1 hp motor will not be able to move on its own; to do this, you will have to pedal or go down the mountain. It will be better to use more powerful engines, but they will be heavier.

Let's look at how to install a chainsaw motor on a bicycle. First of all, you need to install the driven pulley on the rear wheel; it will transmit rotation to the wheel from the motor. To do this, take a regular bicycle rim with a diameter slightly smaller (about 6 cm) than the rear wheel, fix it so that it rotates with the wheel. After placing the engine, weld a metal stand made of steel and pipe under the seat onto the frame. Secure or weld the engine. You can mount the engine on the rear of a bicycle rack if its design allows. Use a drive belt to connect the pulley and motor. Before installation, carefully inspect the belt, because it will bear a large load. When you install a motor on your bike, you have additional options, which means you will need a new seat. It can be made from plywood, lined with foam rubber and covered with leather or leatherette using a furniture stapler.

This is how easy it is to make a bicycle with a chainsaw motor. Don’t forget to also equip your new motorbike with brake lights at the back and a headlight at the front, because you have become a full-fledged participant in the road. Other technical solutions will depend on the type of engine, drive and other design features.

How I did it...

I've always been interested in homemade chainsaw projects. A couple of years ago I wanted to check if it was true that from a chainsaw motor and small wheels you can build a functional moped that fits in the trunk (at that time - BMV518). I found an excellent motor with a gearbox from a Friendship saw, wheels from a Vyatka scooter, a piece of 20x20 pipe and part of a moped frame. It happened in a couple of evenings. In order for the engine to start and run, I replaced the carburetor with a moped carburetor from D6. The result exceeded all expectations - a simple and reliable toy entertained my friends all summer.

Last spring, I realized that simply repairing a moped was no longer interesting and, wanting to lighten the design, I made some changes. It turned out to be even more fun. And now I’ve exchanged this already tired moped for a complete Malaguti Grizzly 12. I want to push in a more powerful motor, we’ll see... I’ll try a motor from a partner chainsaw. Or, as a last resort, from a Stihl 180 chainsaw.

Mobez using a chainsaw

This small moped can be made from a chainsaw. Actually, why not?

Chainsaws, of course, do not have engines as powerful as mopeds, but it won’t hurt to assemble a simple piece of equipment.

So, in order to assemble a moped from a chainsaw we will need:

the actual engine from the chainsaw,
frame,
something like a clutch.

As for the frame, any design you like will do. This could be the frame of a small moped, a bicycle frame, etc.

Choose the place to install the motor yourself. This may be a normal place like on a moped, but for this you will definitely have to strengthen the frame with the help of additional labor. To do this you will need a welding machine. But I think the optimal place would be to mount the engine on the trunk. In this case, you will only have to slightly strengthen the rear fork.

Moped from a chainsawThen you need to install the clutch. You can use it ready-made (suitable for any moped) or make it yourself. To do this, you can take the car starter and cut the pads out of it. In general, the thicker and heavier the pads, the better. Then install the carburetor. It can also be taken from any moped. I think any car salvage yard will have an abundance of these parts. All parts should be thoroughly cleaned, washed with gasoline and installed in places convenient for you.

Once everything is installed, it's time to work on the fuel tank.

This can be any plastic vessel with a volume of about 2 liters. Well, of course, a fuel tank similar to the one installed on the small-sized BMV-518 moped will look more aesthetically pleasing. Well... I guess I'll have to take a walk to the car dump again...

What keys do we use?: chainsaw partner chainsaw Shtil 180 homemade + from a chainsaw

If you have a craving for experimentation and would not refuse the opportunity to turn your bicycle into a homemade moped that can accelerate to 50 km per hour and above, this instruction is for you.

Using simple spare parts, you can build a bicycle with a chainsaw motor with your own hands. Let's get started!

1. Carefully inspect and. The proposed modernization will significantly increase the load on all its parts. Therefore, every part must be inspected and well lubricated. Also check all fasteners and re-tighten the bolts. In addition to constructive necessity, all these actions are the key to your safety.
2. You can make a bicycle with a chainsaw engine or a trimmer engine (also called a gas trimmer). If you are wondering how to adapt a motor from a lawn mower to a bicycle, then there is nothing complicated here. A gas mower is suitable for this design in the same way as a chainsaw. If you choose a chainsaw, make sure that its power is at least 2 kW. And if you have a trimmer, then 1 kW of power will be enough, since the lawnmower engine has a lower speed. The point is that you need to get enough traction to get moving. But at the same time, a more powerful engine means more weight. You need the motor weight to not exceed 6 kg, otherwise the bike will sway noticeably on the road.

1. Check the engine for functionality. A bicycle with a chainsaw engine will, of course, roar loudly - we believe you are ready for this. Most likely, your neighbors and random passers-by will not be ready. Therefore, we recommend that you conduct your tests far from human habitation - in a forest, in a park, on a country road.

Pay special attention to checking the condition of the gas tank. Gasoline must not splash out, as this creates a fire hazard. The engine will be behind you, so you should pay special attention to this point.

1. Now let's find out how to install a chainsaw engine on a bicycle. It is necessary to make room behind the cyclist, above. To do this you will have to remove the wing. The easiest way to use this scheme is to install a drive shaft, and use a tire instead of the driven shaft. This type of drive is the simplest and most effective; the design does not require the use of a large number of parts. The friction shaft will transmit rotation from the engine; for this, the shaft diameter should be approximately 25 mm.

1. To install the engine on your bicycle, weld a metal stand to the frame located under the seat. you need it as low as possible, then your vehicle will be more stable in motion. You can secure the motor to the stand in any way - bolts, clamps or welding.
2. The throttle cable and wires that will allow you to forcibly turn off the engine must be carefully secured to the frame. This is a matter of comfortable riding and cyclist safety.
3. Ready! You can try out your new bike with a chainsaw motor. Keep an eye on it, it should be at least 3 atm.

Are there ready-made solutions?

Yes, everything can be much simpler if you purchase a ready-made set of parts to make a bicycle with a chainsaw engine. In addition to the engine itself, ready-made kits contain all the necessary fasteners, as well as a throttle cable, a power control handle, a forced engine shutdown button and other useful parts.

Conclusion

The dream of all the boys who puzzle over how to install a chainsaw engine on a bicycle can come true in adulthood. Now you have the opportunity to show your engineering ingenuity and assemble the exotic design described above by attaching a chainsaw motor to your bicycle with your own hands. In addition, this is a useful device: such a vehicle can be used for destinations without much stress - fishing, to the dacha, to the store, and most importantly, fuel consumption will be minimal. And even if you run out of gas, you can reach the end point of your journey in the traditional way - using pedals.

The versatility of gasoline chainsaws is proven not only by their multitasking and functionality, but also by the abundance of useful homemade products that craftsmen have learned to make with their own hands. They save money on the purchase of expensive factory devices, for which most people simply do not have the money. But, as they say, the need for invention is acute. Therefore, when talking about chainsaws, many people imagine not only logging or pruning an orchard, but also winches, ice drills, boat motors, grinders, sawmills, which technically competent craftsmen have learned to adapt from everyone’s favorite gasoline-powered tool.

Moving equipment deserves no less attention - bicycles, mopeds, go-karts, ATVs and much more that can be assembled using a chain saw with a gasoline engine. We will talk about how and from what to recreate them and surprise others with an incredible motorized design in this article.

DIY motorbike from a chainsaw

Not every happy owner of a bicycle is delighted with the need to pedal and waste his energy. A motorized bicycle is more convenient and less expensive in terms of power.

Making a bicycle with a chainsaw motor with your own hands is not as difficult as it seems at first glance. For this you will need:

• bike;
• a saw with a gas engine power of at least 2000 W - this indicator will determine whether it can start moving. As practice shows, the engine power is 2 hp. It is enough for a motorbike to reach a speed of up to 40 km/h;
• reservoir for the future fuel tank;
• cable from an old bicycle;
• a handle to allow you to adjust the throttle;
• bolt ties, nuts and other small consumables for creating fasteners;
• connecting elements for creating a connection between the wheels and the engine.

• we assemble the drive shaft - remove the rear wheel tire and install a tire with a diameter of up to 2.5 cm. This equipment will help to adjust the engine speed and, like a gearbox, reduce the number of revolutions;
• We use electric welding to weld a stand from the corners - it will help install the engine from the chainsaw;
• alteration of the clutch - you can use a centrifugal one from a factory saw, connecting it to the wheel;
• we adapt the gas tank - it can be located next to the engine, or on the frame;
• we attach the wire from the engine ignition system to one of the bicycle handles;
• attach a cable from the carburetor to the gas handle so that throttle control is simple and quick;
• We equip the motorbike with protective equipment: mirrors, a flashlight, and proceed to testing a homemade bicycle from a chainsaw.

As you can see, installing a chainsaw motor on a bicycle is not so difficult.

How to make a moped from a chainsaw?

The youth dream of most of our fellow citizens was and remains a moped. It develops a higher speed and has a structure that is more advanced than the motorbike described above. Buying a ready-made moped is not a cheap pleasure. We will tell you how to make it from scrap materials.

For this you will need:

• a motor from a working, powerful saw (in our version, this is the “Friendship” model);
• 2 wheels from an old bicycle;
• pipe with a diameter of 2 cm (metal);
• cable;
• bicycle sprockets; as well as forks;
• old spare parts from a motorcycle - a ready-made fuel tank, a headlight, and, if desired, a seat, although this can also be made with your own hands;
• steering part;
• gas lever.

• we cook the frame to which we connect the wheels from the bicycle, forks, as well as a gas tank and a lantern;
• we adapt the motor - the composition of the installation will depend on the configuration of the frame;

• screw on the gas tank and battery;
• we check that the newly installed elements do not dangle;
• We make a chain drive - it will allow the wheels to receive the torque of the motor and move. You can use a belt instead of a chain pulley. But we must not forget that its wear will be noticeably higher;
• we set up the ignition system - we connect the battery and brake lever to it;
• adjust the exhaust pipe.

The assembly process is complete: you can start testing the moped.

Do-it-yourself chainsaw go-kart: step-by-step assembly

Karting is a modern vehicle that can cover a significant distance in a short period of time. An exclusive kart is the dream of every car enthusiast. You don’t have to race with it: you can easily drive it on rough terrain, on rural roads, and in general anywhere where a larger car cannot pass.

Among the possible equipment options, homemade go-karts made from chainsaws have gained enormous popularity - no less powerful and productive than their serial counterparts. Let's look at it step by step.

Preparatory stage

It begins with detailed drawings and design. We suggest that you familiarize yourself with the finished drawing, which will save time on design;

The proposed overall dimensions are suitable for a person of average height. For teenagers and tall people, the design should be adjusted to their individual parameters. For teenagers, you can use a different scheme presented below.

Collecting the design base

This is a chassis, the manufacture of which will require:

• square pipes (up to 10 m);
• steel pipes;
• thick steel plate;
• equipment for blocking the bottom;
• armchairs.

The process looks like this:

• The pipes are cut according to the proposed scheme and welded using electric welding.

• This is what should happen after welding;

• the front axle is equipped with plugs;
• the rear axle is aggregated - it is welded to the frame itself in such a way that its rotation is ensured;
• the bottom is cut out of metal or durable wood according to the drawing and fitted to the frame;
• seat - in this case, you don’t have to mess around and take a ready-made one from an old kart or car.

Karting equipment with motor

• remove the motor from the chainsaw;

• We make a base for the motor - from a steel plate and a corner. Its pulley must coincide with the last frame structure;
• screw the pulley;
• we take 2 metal rods, which we bend at a right angle - this will be the kart steering wheel drive;

• adjusting the brakes - it is desirable that the braking applies to all 4 wheels. Don’t forget about the brake pedal: pressing the brake with your hands will be very inconvenient;

• we equip the go-kart with wheels – small-diameter wheels from an old racing car will do;
• we set up the ignition - connect it to the throttle valve and the gas handle;
• reliability control, assembly and testing of the finished unit.

Go-karting is a luxury for the average person, but with the help of available tools you can create a budget version of it - a go-kart with a chainsaw engine.

An equally famous homemade product that the domestic “Kulibins” learned to make. To recreate it we will need:

• a scooter designed to support the weight of the person who will operate it. It is desirable that it initially have a manual braking system. The pneumatic wheelbase of the scooter must be durable;
• a chainsaw from which the engine is removed - medium and high-power models are suitable.

The process of assembling a scooter looks simplified compared to previous homemade products:

• First, remove the motor base and secure it to the back of the scooter frame. Make sure that the motor and wheel sprockets match;
• we attach a manual accelerator with ignition of the chain saw - this way the operator can control the moving process;
• If necessary, the scooter is equipped with a brake pedal, but in most cases, the lever for manual control of the scooter is enough for its full operation.
• testing a scooter made from a chainsaw - if it is working properly, the new motorized device is ready and can be used.

Homemade children's ATV from a chainsaw

The last homemade product that we will look at will be dedicated to ATVs. In fact, to assemble an ATV you need similar materials as for a go-kart or tricycle:

• engine from an old powerful and working chainsaw;
• gearbox – increases engine thrust and takes over its operating speed;
• ATV frame – it should be stronger and more stable;
• the driver's seat is good if you have an old moped seat: a teenager will be more comfortable in it than in a bulky car seat;
• wheels with rough tread, diameter of at least 34-35 cm each. This will improve the cross-country ability of the ATV and make it similar to an SUV.

If desired, the prefabricated structure of the ATV can be improved to perfection with shock absorbers: the maneuverability of the ATV will increase, and the operating stroke will become smoother.

Homemade vehicles are cheap, but not always reliable. They can only be used in strict compliance with all safety regulations.

Materials and tools for homemade:
- an engine from a chainsaw (possibly with a damaged body, but with a normal piston);
- clamps;
- bolts with nuts;
- bicycle chain;
- a small sprocket (attached to the engine clutch);
- cable, handle (for throttle control);
- welding;
- Bulgarian;
- spanners;
- headlight, rear brake, battery, generator and other electrical equipment (if desired).

The process of installing an engine on a bicycle:

Step one. We decide on the installation location and remove the excess
First of all, you have to decide where to install the engine. Bicycle designs vary, just like chainsaws. The author installs the engine above the drive sprocket. The principle boils down to using a chain to connect the engine shaft to the drive sprocket of the bicycle, on which the connecting rods with pedals are located. In other words, the engine here simply replaces the cyclist’s legs. This design is simple, and if desired, you can make the bike change gears.

Step two. Making an asterisk
The most difficult part of the homemade product is finding the drive sprocket that is installed on the clutch. To get good towing power, the sprocket should be as small as possible. If you can’t find one, you can try turning it yourself, although you will need good strong steel, which will need to be hardened, otherwise the sprocket will quickly wear out.

Step three. Fastening the engine
An important task is to securely fasten the engine, otherwise, if it comes off, everything can end in disaster. Here you will need corners, and aluminum ones are best, as they are lighter. Choose their number and location depending, again, on the characteristics of the chainsaw and the bicycle. Everything is secured with bolts and nuts. The author drills through the bicycle frame for bolts; you can do the same with the body of a chainsaw.

In addition, install the switch in a convenient place and connect the ignition wire to it. This will make it easy to turn off the engine if necessary.

You can also install tubes on the bolt bars to make the running boards more stylish.

Improvements.
v.0.1
The clutch cup has been improved, the main types of belts PJ, K, SPZ, 3V are supported.
Can be used to connect additional attachments.
Implement the option of a grinder on a chainsaw, the so-called gas cutter.
v.1.0
Added tension rollers.
The first test drive was carried out (02/24/2013). So far without an adequate throttle grip. Just a piece of rope. Basically it works. You can play further.
The engine cannot accelerate on its own. But it easily maintains the set speed. Doesn't move. It grabs if you accelerate to about 10 km/h. According to my subjective assessments. A noticeable vibration is transmitted through the saddle to the rear. You need to think about some kind of foam lining. For such vibration is hardly useful.
v.1.1
Design details.
Photos and videos added.

v.1.2
Economics of the project.

The engine from a Chinese chainsaw 45cm3 cost 300 UAH ($38).
I took it without 2 tires and 2 chains included in the kit. Naked engine.

Steel rim 20" - 30 UAH ($4).

Poly V-belt 4PJ1600 - 70 UAH ($9).
I found Contitech. Although there are many companies producing them.

Steel corner 25x25 mm - 1.1 m - 20 UAH. ($5)
Steel strip 40x5 mm - 1.5 m - 20 UAH. ($5)

Hardware - M8 bolts, M8 nuts, washers, screws, M4 bolts, M4 nuts - 80 UAH ($10)
Expensive because I bought it at retail in different lengths, etc., as needed.

Washers d8xd28x3mm - for M8 bolt, called for wood - 8 pcs.
They need to be machined along an outer diameter of 26.4 mm with a tolerance of -0.1 mm.
They are needed to attach the chainsaw to the bicycle.
They are inserted from 2 sides into 4 mounting holes in the chainsaw body with a mandatory rubber gasket of the same size and thickness, also from 2 sides, so as not to crush the silumin body. On the recoil starter side, you will have to carefully cut holes in the plastic housing for the rear bolt to come out. Under the front bolt, it will be enough to only slightly shorten the plastic tab.

Brackets for fastening the rim - from a plate for fastening pipes or boxes - 5 pcs. - 5 UAH. ($1)
It is cut and bent as needed, it is better to bend in places weakened by a lateral triangular notch, as intended during installation.

Rod M10 (tensioner attached to the seat tube) - 16 UAH. ($10)
P.S. If I had bought a 1700mm long belt, I wouldn’t have needed it at all. It would be possible to make a one-piece frame, similar to a bicycle rack. But since... then...

Dropper tube d4 mm. - 8 UAH ($1)

Total - 550 UAH. ($70)

For factory parts, add another 1000 UAH ($125).

Main part.
The idea arose to make a bicycle with a chainsaw engine, purely for pampering.
And at the same time understand the engines. And then, to my shame, I have no experience.

On the forums they mainly write how to do it with the engine from a trimmer (mower).
But with a chainsaw engine - there is no information.
Since it is very inconvenient to use a chainsaw engine for these purposes :)
But since it is cheaper, 2-3 times, in comparison with the engine from a brush cutter (and there is not much money for all sorts of nonsense)
It was decided to try to implement this idea.

So, the cheapest Chinese chainsaw "Dnipro-M" 45 cm3 was purchased.
"Dnipro-M", "Baikal", "Goodluck", "Ural", "Taiga", "Stavr", "Temp", "Foresta", "Brigadir", "Siberia", "Craft-Tec", "Kraftech ", "Sturm", "Einhell", "Sadko", "Energomash", "Energy", "Zenit", "Start", "PowerTec", "Tekhmash", "Shark", "EuroTec", "Kedr" , “Proton”, “Stern”, etc. (tired of writing) these are all clones of the Japanese Komatsu Zenoah chainsaw of various versions.
In particular, "Dnipro-M" clone of Komatsu Zenoah g-455-avs g-500-avs.

Great - Ardis Santana 26".

Typical appearance with slight variations on the theme:

Hidden text: Typical appearance of Chinese chainsaws

The ideology of a bicycle with a chainsaw engine:
1. Belt drive.
2. Clutch - the original centrifugal chainsaw clutch.
3. Drive pulley - directly on the centrifugal clutch.
4. Driven wheel - 20" bicycle rim.

Work front.
1. Belt drive - poly V-belt 4PJ1600 (4 - number of grooves, PJ - section type, 1600 - belt length in mm). It is quite possible to take a belt with a length in the range of 1600-1700 mm and play with the tension rollers and the height of the engine mounting. 1600 mm is already close to the rear wheel guard. And the fastening must be carried out with an already disassembled engine, i.e. without a gas tank-handle. At 1700 mm, you can try to mount the whole saw directly to the trunk. You can use a domestically produced belt GOST 1284.1-89. The type of section used is K. But it has a slight difference from foreign PJ in pitch.

2. Driven wheel - a 20" bicycle rim, attached directly to the spokes of the rear wheel. I took the cheapest steel one with a width of 30 mm. Drill holes of 4.2 mm along the perimeter of the side of the rim opposite the spokes. Fasten with M4 screws 30 mm long. Adjust the required number M4 nuts to achieve the desired offset of the driven wheel from the tire tread.
You can secure it either using 2 washers or a steel plate folded in half with a hole diameter of 4.2-4.5 mm. I took as a blank a steel pressure plate for pipes or wires with numerous perforations with holes of just the right diameter.

3. When disassembling a centrifugal clutch without special equipment. key, the nut with the left-hand thread was broken.
Although they wrote in all the forums that the Russian universal key is exactly what is needed.
Therefore, I also had to make a nut.

Hidden text: clutch_nut

4. Special clutch nut wrench. (Who wants something simpler, you can make it from a pipe)

Hidden text: Special. clutch nut wrench

5. Clutch cams. Just in case. Didn't make it. I left it with my family, but I think it will be a consumable item.

Hidden text: Clutch cams

6.1. Clutch cup made integral with the drive pulley.

Hidden text: Clutch cup

6.2. Clutch cup assembly.

Hidden text: Clutch cup assembly

7. Replacing the oil pump drive bushing. I called it a washer for some reason, probably because, in principle, it can be made without a cylindrical part going deep into the body, just like a washer. :)

Hidden text: Replacing the oil pump drive bushing

8. The washer is hardened, between the clutch cup and the washer that replaces the oil pump bushing.

Hidden text: Hardened washer

9. Belt tension rollers. I recommend doing two. The first, on the one hand, is rigidly fixed, gives direction to the belt and increases the angle of coverage of the drive pulley. And the second one is spring-loaded. Role: constancy of belt tension under various inaccuracies of the system and also gives the direction of the belt and increases the angle of coverage of the drive pulley. Two versions were created, the first for a 6x19x6 mm bearing and the second for a 10x22x6 mm bearing. The first version seemed a little flimsy to me. Therefore, a more reinforced version 2 was created. But on the current sample, the version with a 6x19x6 mm bearing stands as a rigid roller, and with a 10x22x6 mm bearing as a spring-loaded one. Both worked fine at the time of the test drive.

Bearings used:
6x19x6 6-80026С17 GOST 7242-81, 626-2RS SKF
10x22x6 61900-2RS1 SKF

General view of the tension roller assembly (without fasteners). The final fixation of the roller on the bearings is carried out by lightly punching at 3 points. Since I didn’t fence the retaining rings.