Home- Thin-Section Bearing- Standard Thin Section Ball Bearing-61800 Series
The 61800 Series standard thin section bearings provide an excellent balance between compact design, rotational precision, and operational reliability. Their lightweight structure, low friction characteristics, and space-saving advantages make them suitable for modern industrial systems that require both efficiency and compact integration.
The 61800 Series standard thin section bearings are deep groove ball bearings designed with an extremely slim cross-section and compact structure. Compared with conventional deep groove bearings, the 61800 series maintains a smaller radial and axial profile while still providing stable rotational accuracy, lightweight performance, and reliable load capacity.
Manufacturers widely use this bearing series in applications where installation space is limited but rotational efficiency and precision remain critical. Engineers often select 61800 thin section bearings for lightweight machinery, compact transmission systems, robotics, medical equipment, packaging machines, semiconductor devices, and automation assemblies.
The biggest advantage of the 61800 series lies in its ability to reduce overall equipment size and weight without sacrificing operational stability.
Ultra-Thin Cross Section Design
The 61800 series adopts a thin-walled structure that significantly reduces the bearing profile. This design allows equipment manufacturers to optimize compact mechanical layouts and improve internal space utilization.
The thin-section structure also helps reduce rotating inertia, which improves response speed in high-speed applications.
Deep Groove Raceway Geometry
The raceway design supports both radial loads and moderate axial loads in two directions. This structure enables the bearing to operate smoothly under combined loading conditions while maintaining low friction torque.
Lightweight Construction
The lightweight body reduces the total weight of moving components. For equipment manufacturers, this advantage contributes to lower energy consumption and better dynamic performance.
Many portable or high-speed systems benefit directly from this weight reduction.
High Rotational Accuracy
Manufacturers produce 61800 series bearings with precise dimensional tolerances and stable raceway geometry. This design supports smooth rotation, low vibration, and reduced operating noise.
Precision equipment manufacturers often use these bearings in systems requiring stable positioning and repeatable motion control.
Space-Saving Performance
The compact design allows engineers to reduce the overall size of machinery. Modern industrial equipment increasingly demands smaller footprints and higher integration density, and the 61800 series helps achieve these goals.
Low Friction and Energy Efficiency
The optimized internal geometry minimizes friction during operation. Lower friction generates less heat and improves energy efficiency, especially in continuous-running equipment.
High-Speed Capability
The lightweight rolling elements and optimized raceways allow stable high-speed operation. Many automation systems and electric motor applications require this characteristic.
Reduced Noise and Vibration
Precision machining and smooth surface finishing help lower operational vibration. Quiet operation becomes especially important in medical equipment, laboratory systems, and consumer devices.
Flexible Material and Seal Options
Manufacturers can provide the 61800 series in multiple configurations, including:
Open type bearings
Metal shielded bearings
Rubber sealed bearings
Stainless steel versions
Ceramic hybrid versions
High-temperature grease configurations
This flexibility allows users to match the bearing with specific working environments.
The 61800 series serves a wide range of industries because of its compact size and stable operating characteristics.
Robotics and Automation Equipment
Robotic joints and compact actuators require lightweight components with precise rotational control. Thin section bearings help reduce arm weight and improve motion efficiency.
Medical Devices
Medical equipment manufacturers often prioritize compact structure, low noise, and smooth operation. The 61800 series performs well in imaging systems, diagnostic equipment, and portable medical devices.
Electric Motors and Micro Motors
Small motors benefit from low friction torque and stable high-speed performance. These bearings help improve motor efficiency and reduce operating heat.
Semiconductor and Precision Instruments
Precision industries require bearings with stable accuracy and minimal vibration. The 61800 series supports clean, smooth, and reliable motion.
Packaging and Printing Equipment
High-speed packaging lines and printing machines rely on compact rotating components. Thin section bearings improve equipment responsiveness and reduce mechanical resistance.
Bearing Steel
High-carbon chromium bearing steel remains the most common material choice because it offers excellent hardness, wear resistance, and fatigue strength.
Stainless Steel
Stainless steel versions provide enhanced corrosion resistance for humid or chemically exposed environments.
Ceramic Hybrid Design
Ceramic balls combined with steel rings help reduce friction, improve speed performance, and increase service life in demanding applications.
Customized Lubrication
Manufacturers can supply grease options for:
High-speed operation
Low-temperature environments
High-temperature conditions
Food-grade applications
Low-noise requirements
Choosing the correct thin section bearing depends on several operational factors.
Evaluate Load Requirements
Users should confirm the radial and axial load conditions before selecting a model. Thin section bearings save space, but engineers must still ensure sufficient load capacity.
Consider Rotational Speed
High-speed applications may require optimized lubrication or ceramic hybrid configurations.
Analyze Operating Environment
Dust, moisture, chemicals, and temperature conditions influence sealing structure and material selection.
Verify Installation Space
The main advantage of the 61800 series is compactness, so precise dimensional matching remains essential during equipment design.
Modern machinery continues moving toward lighter, smaller, and more efficient designs. The 61800 series supports this trend by combining compact dimensions with reliable operational performance.
Manufacturers appreciate several long-term benefits:
Reduced machine weight
Improved energy efficiency
Better space utilization
Lower operating noise
Stable high-speed performance
Flexible customization options
These advantages help equipment manufacturers improve both product competitiveness and operational reliability.
| Deep Groove Ball Bearing (618 Series) | ||||||||
| Item No. |
Dimension（mm） |
Basic Rated Load（KN） |
Rated Speed（r•min） |
Approx Weight
（kg）
|
||||
| d | D | B | Cr | Cor | Reference | Limited | W | |
| 61805 | 25 | 37 | 7 | 4.36 | 2.6 | 38 000 | 24,000 | 0.022 |
| 61805-2RS | / | 11,000 | ||||||
| 61805-2Z | 38,000 | 19,000 | ||||||
| 61806 | 30 | 42 | 7 | 4.49 | 2.9 | 32,000 | 20,000 | 0.025 |
| 61806-2RS | / | 95,000 | ||||||
| 61806-2Z | 32,000 | 16,000 | ||||||
| 61807 | 35 | 47 | 7 | 4.35 | 3.35 | 30,000 | 18,000 | 0.03 |
| 61807-2RS | / | 85,000 | ||||||
| 61807-2Z | 30,000 | 15,000 | ||||||
| 61808 | 40 | 52 | 7 | 4.49 | 3.75 | 26,000 | 16,000 | 0.034 |
| 61808-2RS | / | 7,500 | ||||||
| 61808-2Z | 26,000 | 13,000 | ||||||
| 61809 | 45 | 58 | 7 | 6.63 | 6.10 | 22,000 | 14,000 | 0.04 |
| 61809-2RS | / | 6,700 | ||||||
| 61809-2Z | 22,000 | 16,000 | ||||||
| 61810 | 50 | 65 | 7 | 6.76 | 6.8 | 20,000 | 13,000 | 0.05 |
| 61810-2RS | 6,000 | |||||||
| 61810-2Z | 20,000 | 10,000 | ||||||
| 61811 | 55 | 72 | 9 | 9 | 8.8 | 19,000 | 12,000 | 0.09 |
| 61811-2RS | / | 5,300 | ||||||
| 61811-2Z | 19,000 | 9,500 | ||||||
| 61812 | 60 | 78 | 10 | 11.9 | 11.4 | 17,000 | 11,000 | 0.11 |
| 61812-2RS | / | 4,800 | ||||||
| 61812-2Z | 17,000 | 8,500 | ||||||
| 61813 | 65 | 85 | 10 | 12.14 | 12.7 | 16,000 | 10,000 | 0.13 |
| 61813-2RS | / | 4,500 | ||||||
| 61813-2Z | 16,000 | 8,000 | ||||||
| 61814 | 70 | 90 | 10 | 12.4 | 13.2 | 15,000 | 9,000 | 0.138 |
| 61914-2RS | / | 4,300 | ||||||
| 16014-2Z | 15,000 | 7,500 | ||||||
| 61815 | 75 | 95 | 10 | 12.5 | 10.8 | 14,000 | 8,500 | 0.15 |
| 61815-2RS | / | 4,000 | ||||||
| 61815-2Z | 14,000 | 7,000 | ||||||
| 61816 | 80 | 100 | 10 | 12.7 | 11.2 | 13,000 | 8,000 | 0.2 |
| 61816-2RS | / | 3,600 | ||||||
| 61816-2Z | 13,000 | 6,600 | ||||||
| 61817 | 85 | 110 | 13 | 19.5 | 16.6 | 12,000 | 7,500 | 0.28 |
| 61817-2RS | / | 3,400 | ||||||
| 61817-2Z | 12,000 | 6,000 | ||||||
| 61818 | 90 | 115 | 13 | 19.5 | 17 | 11,000 | 7,000 | 0.29 |
| 61818-2RS | / | 3,200 | ||||||
| 61818-2Z | 11,000 | 5,600 | ||||||
| 61819 | 95 | 120 | 13 | 19.8 | 20.4 | 11,000 | 6,700 | 0.32 |
| 61819-2RS | / | 3,000 | ||||||
| 61819-2Z | 11,000 | 3,500 | ||||||
| 61820 | 100 | 125 | 13 | 17.8 | 18.3 | 10,000 | 6,300 | 0.33 |
| 61820-2RS | 3,000 | |||||||
| 61820-2Z | 10,000 | 5,300 | ||||||
| 61821 | 105 | 130 | 13 | 20.8 | 19.7 | 10,000 | 6,300 | 0.34 |
| 61821-2RS | / | 2,800 | ||||||
| 61821-2Z | 10,000 | 5,000 | ||||||
| 61822 | 110 | 140 | 16 | 28.1 | 26 | 9,500 | 5,600 | 0.50 |
| 61822-2RS | / | 2,600 | ||||||
| 61822-2Z | 9,500 | 4,500 | ||||||
| 61824 | 120 | 150 | 16 | 29.1 | 28 | 8.5 | 5,300 | 0.54 |
| 61824-2RS | / | 2,400 | ||||||
| 61824-2Z | 8,500 | 4,300 | ||||||
| 61826 | 130 | 165 | 18 | 37.9 | 42.9 | 3200 | 4000 | 0.736 |
| 61826-2RS | 3000 | 3800 | ||||||
| 61826-2Z | 2800 | 3600 | ||||||
| 61828 | 140 | 175 | 18 | 39 | 46.5 | 7,500 | 4,500 | 0.82 |
| 61828-2RS | / | 2,000 | ||||||
| 61828-2Z | 7,500 | 3,600 | ||||||
| 61830 | 150 | 190 | 20 | 48.8 | 51 | 6,700 | 4,300 | 1.11 |
| 61830MA | 150 | 190 | 20 | 48.8 | 51 | 6,700 | 4,300 | 1.3 |
| 61832 | 160 | 200 | 20 | 49.6 | 59.1 | 6,300 | 4,000 | 1.2 |
| 61834 | 170 | 215 | 22 | 61.5 | 73.3 | 6000 | 3,600 | 1.545 |
| 61836 | 180 | 225 | 22 | 62.3 | 75.9 | 5,600 | 3,400 | 1.621 |
| 61838 | 190 | 240 | 24 | 75.1 | 91.6 | 5,300 | 3,200 | 2.1 |
| 61840 | 200 | 250 | 24 | 74.2 | 101.2 | 5,000 | 3,200 | 2.21 |
| 61844 | 220 | 270 | 24 | 76.4 | 97.8 | 4,500 | 2,800 | 2.369 |
| 61848 | 240 | 300 | 28 | 108 | 150 | 4,000 | 2,600 | 3.90 |
| 61852 | 260 | 320 | 28 | 111 | 163 | 3,800 | 2,400 | 4.15 |
| 61856 | 280 | 350 | 33 | 135 | 178 | 3,400 | 2,200 | 6.25 |
| 61856MA | 280 | 350 | 33 | 138 | 200 | 3,400 | 2,800 | 7.25 |
| 61860 | 300 | 380 | 38 | 172 | 245 | 3,200 | 2,000 | 8.9 |
| 61860MA | 300 | 380 | 38 | 172 | 245 | 3,200 | 2,600 | 10.5 |
| 61864 | 320 | 400 | 38 | 173 | 255 | 3,000 | 1,900 | 9.50 |
| 61864MA | 320 | 400 | 38 | 173 | 255 | 3,000 | 2,400 | 11.00 |
| 61868 | 340 | 420 | 38 | 178 | 275 | 2,800 | 1,800 | 10 |
| 61872MA | 360 | 400 | 38 | 182 | 285 | 2,600 | 2,800 | 12 |
| 61876MA | 380 | 480 | 46 | 242 | 390 | 2,400 | 2,000 | 20 |
| 61880MA | 400 | 500 | 46 | 247 | 405 | 2,400 | 1,900 | 20.5 |
| 61884MA | 420 | 520 | 46 | 251 | 425 | 2,200 | 1,800 | 21.5 |
| 61888MA | 440 | 540 | 46 | 255 | 440 | 2,300 | 1,900 | 22.5 |
| 61892MA | 460 | 580 | 56 | 319 | 570 | 2,000 | 1,600 | 35 |
| 61896MA | 480 | 500 | 56 | 325 | 600 | 1,900 | 1,600 | 36.5 |
| 618/500MA | 500 | 620 | 56 | 332 | 620 | 1,800 | 1,500 | 40.5 |
| 618/530MA | 530 | 650 | 56 | 332 | 655 | 1,700 | 1,400 | 39.5 |
| 618/560MA | 560 | 680 | 56 | 345 | 395 | 1,600 | 1,300 | 42 |
| 618/600MA | 600 | 730 | 60 | 364 | 765 | 1,500 | 1,200 | 52 |
| 618/630MA | 630 | 780 | 69 | 442 | 965 | 1,400 | 1,100 | 73 |
| 618/670MA | 670 | 820 | 69 | 442 | 1,000 | 1,300 | 1,100 | 83.5 |
| 618/710MA | 710 | 870 | 74 | 475 | 1,100 | 1,200 | 1,000 | 93.5 |
| 618/750MA | 750 | 920 | 78 | 527 | 1,250 | 1,100 | 900 | 110 |
| 618/800MA | 800 | 980 | 82 | 559 | 1,270 | 1,000 | 850 | 130 |
| 618/850MA | 850 | 1030 | 82 | 559 | 1,430 | 950 | 750 | 140 |
| 618/900MA | 900 | 1090 | 85 | 618 | 1,600 | 850 | 700 | 167 |
| 618/950MA | 950 | 1150 | 90 | 537 | 1730 | 800 | 670 | 197 |
| 618/1000MA | 1,000 | 1,220 | 100 | 637 | 1.8 | 750 | 600 | 245 |
