The 63 and 64 series deep groove ball bearings are designed for applications where higher radial loads, improved stability, and long service life are required. Compared with standard 62 series bearings, these two series feature a larger ball size and reinforced raceway structure, making them ideal for heavy-duty and continuous-operation environments.
Thanks to their simple structure and excellent performance balance, 63 and 64 series bearings are widely used across industries such as electric motors, industrial gearboxes, mining equipment, pumps, compressors, and heavy machinery.
| Dimensions of 63 and 64 Series Deep Groove Ball Bearings | |||||||||||||
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | Column 6 | Column 7 | Column 8 | Column 9 | Column 10 | Column 11 | Column 12 | Column 13 | Column 14 |
| Model | Inner Diameter | Outer Diameter | Width | Central Economic | Sphere Diameter | Number of Pitches | Outer Trench | Outer Inner Diameter | Groove Curvature | Inner Trench | Inner and Outer Diameter | Groove Curvature | |
| 6300 | 10 | 35 | 11 | 23.5 | 6.35 | 7 | 29.858 | 27.6 | 3.27 | 17.15 | 19.4 | 3.27 | |
| 6301 | 12 | 37 | 12 | 24.5 | 7.938 | 6 | 32.43 | 29.7 | 4.08 | 16.562 | 19.3 | 4.08 | |
| 6302 | 15 | 42 | 13 | 29.5 | 7.938 | 7 | 37.44 | 34.7 | 4.08 | 21.56 | 24.3 | 4.08 | |
| 6303 | 17 | 47 | 14 | 32.5 | 8.731 | 7 | 41.24 | 38.6 | 4.49 | 23.76 | 26.8 | 4.49 | |
| 6304 | 20 | 52 | 15 | 36 | 9.525 | 7 | 45.53 | 42.2 | 4.9 | 26.47 | 29.8 | 4.9 | |
| 6305 | 25 | 62 | 17 | 43.5 | 11.509 | 7 | 55.01 | 51 | 6.03 | 31.99 | 36 | 5.92 | |
| 6306 | 30 | 72 | 19 | 52 | 12 | 8 | 64.01 | 59.2 | 6.18 | 40 | 44.8 | 6.18 | |
| 6307 | 35 | 80 | 21 | 58.5 | 13.494 | 8 | 71.99 | 66.8 | 6.94 | 45 | 50 | 6.94 | |
| 6308 | 40 | 90 | 23 | 65.5 | 15.081 | 8 | 80.58 | 75.2 | 7.76 | 50.41 | 56.5 | 7.76 | |
| 6309 | 45 | 100 | 25 | 73.5 | 17.462 | 8 | 90.96 | 84.5 | 8.99 | 56.03 | 62.4 | 8.99 | Big ball |
| 6309 | 45 | 100 | 25 | 72.5 | 16.669 | 8 | 89.169 | 83.3 | 8.58 | 55.831 | 61.7 | 8.58 | Small Ball |
| 6310 | 50 | 110 | 27 | 80 | 19.05 | 8 | 99.05 | 92.3 | 9.81 | 60.95 | 67.6 | 9.81 | Big ball |
| 6310 | 50 | 110 | 27 | 80 | 17.4625 | 8 | 97.4625 | 91.3 | 8.99 | 62.5375 | 68.7 | 8.99 | Small Ball |
| 6311 | 55 | 120 | 29 | 87.5 | 20.638 | 8 | 108.138 | 100.9 | 10.63 | 66.862 | 74 | 10.63 | |
| 6312 | 60 | 130 | 31 | 95 | 22.225 | 7 | 117.225 | 109.4 | 11.45 | 72.775 | 80.5 | 11.45 | |
| 6313 | 65 | 140 | 33 | 102.5 | 23.813 | 8 | 126.313 | 117.9 | 12.26 | 78.687 | 87 | 12.26 | |
| 6314 | 70 | 150 | 35 | 110 | 25.4 | 8 | 135.4 | 126.5 | 13.08 | 84.6 | 93.5 | 13.08 | |
| 6315 | 75 | 160 | 37 | 117.5 | 26.988 | 8 | 144.48 | 135 | 13.9 | 90.51 | 99.9 | 13.9 | |
| 6316 | 80 | 170 | 39 | 125 | 26.988 | 8 | 151.988 | 142.5 | 13.9 | 98.012 | 107.4 | 13.9 | |
| 6317 | 85 | 180 | 41 | 132.5 | 28.757 | 8 | 161.257 | 151.2 | 14.8 | 103.743 | 113.8 | 14.8 | |
| 6318 | 90 | 190 | 43 | 140 | 30.163 | 8 | 170.16 | 158.1 | 15.53 | 109.84 | 121.9 | 15.53 | |
| 6319 | 95 | 200 | 45 | 147.5 | 31.75 | 8 | 179.25 | 168.1 | 16.35 | 115.75 | 126.9 | 16.35 | |
| 6320 | 100 | 215 | 47 | 157.5 | 33.3375 | 8 | 190.8375 | 17.16 | 124.1625 | 135.8 | 17.16 | ||
| 6400 | |||||||||||||
| 6401 | 12 | 42 | 13 | ||||||||||
| 6402 | 15 | 52 | 15 | ||||||||||
| 6403 | 17 | 62 | 17 | 39.5 | 12.7 | 6 | 52.2 | 47.1 | 6.54 | 26.8 | 31.8 | 6.54 | |
| 6404 | 20 | 72 | 19 | 46 | 14.288 | 6 | 60.288 | 54.5 | 7.35 | 31.712 | 37.4 | 7.35 | |
| 6405 | 25 | 80 | 21 | 52.5 | 16.669 | 6 | 69.169 | 62.5 | 8.58 | 35.831 | 42.5 | 8.58 | |
| 6406 | 30 | 90 | 23 | 60 | 17.4625 | 6 | 77.4625 | 70.5 | 8.99 | 42.5375 | 49.5 | 8.99 | |
| 6407 | 35 | 100 | 25 | 67.5 | 19.05 | 6 | 86.55 | 78.9 | 9.81 | 48.45 | 56.1 | 9.81 | |
| 6408 | 40 | 110 | 27 | 75 | 20.638 | 6 | 95.638 | 87.4 | 10.62 | 54.362 | 62.6 | 10.62 | |
| 6409 | 45 | 120 | 29 | 82.5 | 22.225 | 6 | 104.725 | 95.8 | 11.44 | 60.275 | 69.1 | 11.44 | |
| 6410 | 50 | 130 | 31 | 90 | 23.813 | ||||||||
| 6411 | 55 | 140 | 33 | 25.4 | |||||||||
| 6412 | 60 | 150 | 35 | 26.988 | |||||||||
| 6413 | 65 | 160 | 37 | 28.575 | |||||||||
| 6414 | 70 | 180 | 42 | ||||||||||
| 6415 | 75 | 190 | 45 | ||||||||||
| 6416 | 80 | 200 | 48 | ||||||||||
| 6417 | 85 | 210 | 52 | ||||||||||
| 6418 | 90 | 225 | 54 | ||||||||||
| 6419 | 95 | 240 | 55 | ||||||||||
| 6420 | 100 | 250 | 58 | ||||||||||
1. Larger Ball Design for Higher Load Capacity
Both 63 and 64 series bearings adopt larger rolling elements, allowing them to withstand significantly higher radial loads than lighter series bearings. This makes them particularly suitable for equipment operating under constant load or shock conditions.
2. Optimized Raceway Geometry
The deep groove design ensures smooth rotation and low friction, while precisely machined raceways improve load distribution and reduce internal stress during operation.
3. High Rigidity and Dimensional Stability
The thicker inner and outer rings enhance overall rigidity, helping the bearing maintain stability even at higher speeds or under fluctuating loads.
Performance Advantages
High radial load capacity
Moderate axial load support in both directions
Low friction and low noise during operationExcellent fatigue resistance and long service life
Minimal maintenance requirements
These advantages make 63 and 64 series bearings a reliable choice for users seeking durability without sacrificing rotational efficiency.
To meet different operating environments, 63 and 64 series deep groove ball bearings are available with multiple configurations:
Open type – Suitable for clean environments with external lubrication
Metal shields (ZZ) – Protect against dust and debris while allowing higher speeds
Rubber seals (2RS) – Provide enhanced protection in humid or contaminated conditions
High-quality grease or oil lubrication ensures stable performance and extended bearing life, even under continuous operation.
Electric motors and generators
Industrial pumps and compressors
Gearboxes and transmission systems
Mining and construction machinery
Agricultural and heavy-duty equipment
Their versatility allows them to perform reliably in both high-speed rotation and high-load scenarios.
Choosing the right bearing directly affects equipment reliability and operating costs. The 63 and 64 series stand out due to their robust design, proven performance, and wide application range. Whether you are upgrading existing machinery or designing new equipment, these bearings offer a dependable solution that balances strength, efficiency, and longevity.
For manufacturers and distributors, they also represent a high-demand product line, making them an excellent choice for industrial supply and long-term cooperation.
