The bearings used in the MTZ-2 tractor are all selected based on the working needs of different parts, with clear purposes:
The most widely used are ordinary ball bearings, mostly installed in parts that do not bear extremely heavy loads, such as generators, hydraulic mechanisms, power take-off shafts, some gearbox shafts, fans, brakes, crawler mechanisms and other positions. These bearings have a simple structure and are easy to maintain. They can withstand radial forces generated when the shaft rotates, as well as a small amount of axial movement force of the shaft; some models are equipped with dust covers or seals to prevent sediment and oil from entering, making them more durable.
In core components with heavy loads and strong impacts, such as the engine crankshaft, gearbox main shaft, and final drive, cylindrical roller bearings are used. These bearings rely on line contact to bear loads, so they can withstand much heavier forces than ball bearings. Some are also designed with special structures to adapt to compact installation spaces. Tapered roller bearings are used in parts like front wheel hubs and steering worms, which can withstand both radial and axial forces at the same time, adapting to the complex stress conditions of wheels and steering, and are not prone to looseness or wobble.
There are also some special-purpose bearings: angular contact bearings are used in positions such as the governor shaft and fuel pump, which can bear both radial and axial forces simultaneously. Some models have removable outer rings for easy installation and maintenance; thrust ball bearings are used for the governor shaft and front axle supports, which are specially designed to withstand axial forces, preventing the shaft from moving back and forth, and ensuring stable operation of the mechanism.
Overall, these bearings are matched according to actual needs: ordinary ball bearings cover most general scenarios, roller bearings withstand heavy loads and impacts, and special bearings solve special stress and installation requirements. This configuration ensures that all parts of the tractor rotate stably, withstand heavy loads, and are durable and easy to repair during operation.
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The table below lists the specific bearing models used on the MTZ-2 tractor:
| Bearing installation location | Bearing designation | Size | Bearing type | Quantity |
| Power take-off shaft (rear support) | 210 | 50×90×20 | Single-row radial ball | 1 |
| Generator G46-G (back support) | 204 | 20×47×14 | Single-row radial ball | 1 |
| Generator G46-G (front support) | 60204 | 20×47×14 | Single row radial ball bearing with one shielding washer | 1 |
| Hydraulic mechanism (rear support) | 209 | 45×85×19 | Single-row radial ball | 1 |
| Hydraulic mechanism (front support) | 207 | 35×72×17 | Single-row radial ball | 1 |
| Engine (crankshaft of starting engine PD-10M and PD-10U, middle and rear supports) | 2206 | 30x62x16 | Radial roller with short cylindrical rollers without flanges on the outer ring | 2 |
| Engine (regulator shaft of starting motor) | 202 | 15×35×11 | Single-row radial ball | 2 |
| Engine (speed governor shaft) | 8202 | 15x32x12 | Single thrust ball | 1 |
| Engine (governor shaft, rear support) | 200 | 10×30×9 | Single-row radial ball | 1 |
| Engine (governor shaft, front support) | 36203 | 17x40x12 | Single-row angular contact ball bearing one-piece with a bevel on the outer ring with a contact angle α = 12º | 1 |
| Motor (rear fan drive support) | 208 | 40×80×18 | Single-row radial ball | 1 |
| Engine (front fan drive support) | 308 | 40x90x23 | Single-row radial ball | 1 |
| Engine (generator drive, front and rear mounts) | 209 | 45×85×19 | Single-row radial ball | 2 |
| Engine (fuel pump, front and rear camshaft bearings) | 6020 | 100×150×24 | Single row angular contact ball bearing with removable outer ring | 2 |
| Differential (right and left axle bearings) | 411 | 55×140×33 | Single-row radial ball | 2 |
| Final drive (driven gear, inner and outer bearings) | 317 | 85×180×41 | Single-row radial ball | 4 |
| Final drive (pinion, inner support) | 292218 | 107x160x30 | Radial roller with short cylindrical rollers without inner ring | 2 |
| Final drive (pinion, outer bearing) | 32216 | 80×140×26 | Radial roller with short cylindrical rollers without flanges on the inner ring | 2 |
| Gearbox (secondary shaft, rear support) | 32612 | 60×130×46 | Radial roller with short cylindrical rollers without flanges on the inner ring | 1 |
| Gearbox (secondary shaft, front support) | 50408 | 40x110x27 | Single row radial ball bearing with a groove on the outer ring | 1 |
| Gearbox (primary shaft, front and rear support) | 42211 КМ | 55x100x21 | Radial roller with short cylindrical rollers with a single flange inner ring | 2 |
| Gearbox (intermediate shaft, rear support) | 310 | 50×110×27 | Single-row radial ball | 1 |
| Gearbox (intermediate shaft, front support) | 211 | 55×100×21 | Single-row radial ball | 1 |
| Gearbox (reverse gear) | 206 | 30×62×16 | Single-row radial ball | 2 |
| Transmission (intermediate gear) | 208 | 40×80×18 | Single-row radial ball | 2 |
| Magneto (rotor, front and rear legs) | 6012 | 60×95×18 | Single row angular contact ball bearing with removable outer ring | 2 |
| Front axle (right and left support) | 8210 | 50x78x22 | Single thrust ball | 2 |
| Drive pulley (driven shaft, right and left support) | 408 | 40×110×27 | Single-row radial ball | 2 |
| Drive pulley (drive shaft, front support) | 408 | 40×110×27 | Single-row radial ball | 1 |
| Starting motor (governor gear) | 202 | 15×35×11 | Single-row radial ball | 2 |
| Starting engine PD-10M (transmission mechanism) | 207 | 35×72×17 | Single-row radial ball | 4 |
| Starting engine PD-10M PD-10U (crankshaft, front support) | 205 | 25×52×15 | Single-row radial ball | 1 |
| Starting motor PD-10M and PD-10U (gear) | 202 | 15×35×11 | Single-row radial ball | 2 |
| Steering (bipod shaft) | 922205 К | 25x52x15 | Single row radial roller without inner ring | 1 |
| Steering (worm) | 977909 | 46,673x72x17,2 | Conical angular contact roller without inner ring | 2 |
| Front wheel hubs (inner bearings) | 7609 | 45×100×38.2 | Single row tapered roller | 2 |
| Front wheel hubs (outer bearings) | 7608 | 40×90×35.25 | Single row tapered roller | 2 |
| Clutch (Rear Clutch Support) | 308 | 40×90×23 | Single-row radial ball | 1 |
| Clutch (Front Clutch Support) | 6-80205 С5 | 25x52x15 | Single row radial ball bearing with two shields | 1 |
| Braking system (front and rear support) | 308 | 40×90×23 | Single-row radial ball | 4 |
| Creeper | 208 | 40×80×18 | Single-row radial ball | 2 |
| Creeper (primary and secondary shaft, rear support) | 50308 | 40×90×23 | Single row radial ball bearing with a groove on the outer ring | 2 |