70, 72, 73, 78, and 79 series angular contact ball bearings are widely used in machine tools, robotics, automotive, aerospace, wind energy, and industrial machinery. Their ability to handle demanding loads and high speeds makes them a reliable choice for engineers and equipment designers seeking both performance and longevity.
Angular contact ball bearings are a cornerstone in modern machinery, offering a unique combination of high-speed performance, precision, and load-handling capabilities. The 70, 72, 73, 78, and 79 series are engineered to meet the demanding requirements of industrial, automotive, and precision engineering applications, ensuring smooth operation, durability, and reliability.
| Dimensions of 60, 62, 63, 68, and 69 Series Angular Contact Ball Bearings | ||||||||||||
| Model | Inner Diameter | Outer Diameter | Width | Central Economic | Sphere Diameter | Number of Balls | Outer Trench | Outer Inner Diameter | Groove Curvature R | Inner Trench | Inner and Outer Diameter | Groove Curvature Ri |
| 702 | ||||||||||||
| 703 | 3 | 9 | 3/5 | 6 | 1.588 | 6 | 7.588 | 7.2 | 0.82 | 4.412 | 4.8 | 0.82 |
| 704 | 4 | 12 | 4 | 8 | 1.588 | 8 | 9.59 | 9.31 | 0.83 | 6.41 | 6.7 | 0.82 |
| 705 | 5 | 14 | 5 | 9.5 | 2 | 8 | 11.508 | 11.1 | 1.05 | 7.5 | 7.9 | 1.03 |
| 706 | 6 | 17 | 6 | 11.5 | 3.175 | 6 | 14.683 | 14 | 1.67 | 8.325 | 8.98 | 1.64 |
| 707 | 7 | 19 | 6 | 13 | 3.175 | 7 | 16.183 | 15.55 | 1.67 | 9.825 | 10.46 | 1.64 |
| 708 | 8 | 22 | 7 | 15 | 3.969 | 7 | 18.977 | 18.2 | 2.08 | 11.031 | 11.8 | 2.04 |
| 709 | 9 | 24 | 7 | 16 | 3.969 | 7 | 19.977 | 19.18 | 2.08 | 12.031 | 12.82 | 2.04 |
| 722 | ||||||||||||
| 723 | 3 | 10 | 4 | 6.5 | 1.588 | 7 | 8.08 | 7.8 | 0.81 | 4.91 | 5.2 | 0.81 |
| 724 | 4 | 13 | 5 | 8.2 | 2.381 | 6 | 10.589 | 10.1 | 1.24 | 5.819 | 6.3 | 1.23 |
| 725 | 5 | 16 | 5 | 10.5 | 2.381 | 8 | 12.889 | 12.4 | 1.24 | 8.119 | 8.6 | 1.23 |
| 726 | 6 | 19 | 6 | 13 | 3.175 | 7 | 16.183 | 15.55 | 1.67 | 9.825 | 10.46 | 1.64 |
| 727 | 7 | 22 | 7 | 15 | 3.969 | 7 | 18.97 | 18.2 | 2.08 | 11.03 | 11.8 | 2.04 |
| 728 | 8 | 24 | 8 | 16 | 3.969 | 7 | 19.97 | 19.2 | 2.08 | 12.03 | 12.8 | 2.04 |
| 729 | 9 | 26 | 8 | 18 | 4.763 | 7 | 22.77 | 21.3 | 2.49 | 13.23 | 14.9 | 2.45 |
| 732 | ||||||||||||
| 733 | 3 | 13 | 5 | 8.2 | 2.381 | 6 | 10.589 | 10.1 | 1.24 | 5.819 | 6.3 | 1.23 |
| 734 | 4 | 16 | 5 | 10.5 | 2.381 | 8 | 12.88 | 12.4 | 1.22 | 8.11 | 8.6 | 1.22 |
| 735 | 5 | 19 | 6 | 13 | 3.175 | 7 | 16.183 | 15.55 | 1.67 | 9.82 | 10.46 | 1.67 |
| 736 | 6 | 22 | 7 | 14 | 3.969 | 6 | 17.969 | 17.2 | 2.04 | 10.031 | 10.8 | 2.04 |
| 737 | 7 | 26 | 9 | 16.5 | 4.7625 | 6 | 21.26 | 19.6 | 2.44 | 11.737 | 13.4 | 2.44 |
| 738 | 8 | 28 | 9 | 18 | 4.762 | 7 | 22.77 | 21.3 | 2.49 | 13.23 | 14.9 | 2.44 |
| 739 | 9 | 30 | 10 | 19.5 | 4.7625 | 7 | 24.26 | 22.6 | 2.49 | 14.737 | 16.4 | 2.44 |
| 781 | 1 | 3 | 1 | 2 | 0.5 | 7 | 2.5 | 2.35 | 0.26 | 1.5 | 1.65 | 0.26 |
| 782 | 2 | 5 | 1.5/2.3 | 3.5 | 0.8 | 7 | 4.3 | 4.1 | 0.41 | 2.7 | 2.9 | 0.41 |
| 783 | 3 | 7 | 2/3 | 5 | 1.2 | 7 | 6.2 | 5.9 | 0.618 | 3.8 | 4.1 | 0.618 |
| 784 | 4 | 9 | 2.5/4 | 6.5 | 1.588 | 7 | 8.088 | 7.77 | 0.82 | 4.912 | 5.22 | 0.82 |
| 785 | 5 | 11 | 3/5 | 8 | 1.588 | 8 | 9.59 | 9.31 | 0.83 | 6.41 | 6.7 | 0.82 |
| 786 | 6 | 13 | 3.5/5 | 9.5 | 2 | 8 | 11.508 | 11.1 | 1.05 | 7.5 | 7.9 | 1.03 |
| 787 | 7 | 14 | 3.5/5 | 10.5 | 2 | 8 | 12.5 | 12.1 | 1.05 | 8.5 | 8.9 | 1.03 |
| 788 | 8 | 16 | 4/5 | 12 | 2.381 | 9 | 14.381 | 13.8 | 1.25 | 9.62 | 10.2 | 1.22 |
| 789 | 9 | 17 | 4/5 | 13 | 2.381 | 9 | 15.38 | 14.9 | 1.25 | 10.62 | 11.1 | 1.22 |
| 791 | 1 | 4 | 1.6 | 2.5 | 0.8 | 5 | 3.3 | 3.1 | 0.41 | 1.7 | 1.9 | 0.41 |
| 792 | 2 | 6 | 2.3/3 | 4 | 1 | 7 | 5 | 4.75 | 0.51 | 3 | 3.25 | 0.51 |
| 793 | 3 | 8 | 3/4 | 5.5 | 1.2 | 7 | 6.7 | 6.4 | 0.61 | 4.3 | 4.6 | 0.61 |
| 794 | 4 | 11 | 4 | 8 | 1.588 | 8 | 9.59 | 9.31 | 0.83 | 6.41 | 6.7 | 0.82 |
| 795 | 5 | 13 | 4 | 9.5 | 2 | 8 | 11.508 | 11.1 | 1.05 | 7.5 | 7.9 | 1.03 |
| 796 | 6 | 15 | 5 | 10.5 | 2.381 | 8 | 12.89 | 12.4 | 1.25 | 8.11 | 8.6 | 1.23 |
| 797 | 7 | 17 | 5 | 12 | 2.381 | 9 | 14.381 | 13.8 | 1.25 | 9.62 | 10.2 | 1.22 |
| 798 | 8 | 19 | 6 | 13.5 | 3.175 | 7 | 16.68 | 16.05 | 1.67 | 10.33 | 10.96 | 1.64 |
| 799 | 9 | 20 | 6 | 14.5 | 3.175 | 8 | 17.675 | 17 | 1.67 | 11.325 | 12 |
1.64 |
70 Series
Designed for high-speed operations, the 70 series angular contact ball bearings feature optimized internal geometry to reduce friction and heat generation. These bearings are ideal for spindles, pumps, and electric motors, where precision and stability are critical.
72 Series
The 72 series focuses on moderate to heavy radial and axial loads, providing excellent rigidity and fatigue resistance. These bearings are often used in gearboxes, machine tools, and conveyor systems, ensuring reliable operation under fluctuating loads.
73 Series
With enhanced contact angles, the 73 series excels in handling combined radial and axial loads, making it suitable for applications like high-speed turbines, precision robotics, and CNC machinery. The series balances load capacity with rotational accuracy, offering versatile performance.
78 Series
The 78 series is engineered for heavy-duty industrial applications. These bearings can withstand high axial loads and are often applied in mining equipment, wind turbines, and steel rolling mills, where both durability and load-carrying capability are essential.
79 Series
The 79 series provides maximum axial load support with high rigidity. Commonly used in automotive transmissions, pumps, and high-precision spindle systems, these bearings are optimized for environments where minimal deflection and long service life are required.
High-Speed Capability: Optimized design allows smooth operation even at high rotational speeds.
Load Versatility: Capable of handling both radial and axial loads, with specific series optimized for combined load scenarios.
Durability and Fatigue Resistance: Manufactured with high-quality steel and precision heat treatment to extend service life.
Precision Engineering: Tight tolerances ensure consistent performance in critical applications.
Easy Integration: Available in a wide range of sizes to fit standard housings and assemblies.
Selecting the right angular contact bearing can dramatically improve machine efficiency and reduce maintenance costs. The 70–79 series offers:
Exceptional rotational accuracy for precision machinery
High axial and radial load capacity for diverse industrial needs
Long service life and reliability under extreme operating conditions
Wide availability of sizes and configurations for easy replacement
