71902 ACE/P4AQBCB Super Precision Angular Contact Ball Bearing with High Speed 68,000 rpm and P4A Precision Grade
71902 ACE/P4AQBCB 15×28×28 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing - High Speed
Matched set of four super-precision, high-speed E design, single row angular contact ball bearings.
The 71902 ACE/P4AQBCB bearing features a bore diameter of 15 mm, outside diameter of 28 mm, and width of 28 mm. With precise dimensions, high static load capacity, and P4A precision grade, it delivers superior performance and reliability for applications requiring high rotational accuracy and stability.
| Part Number | 71902 ACE/P4AQBCB |
| Bearing Type | Angular Contact |
| Measurement Unit | Metric |
| Inner Bore Diameter (d) | 15 mm |
| Inner Bore Diameter Tolerance | -0.004mm to 0 |
| Outer Bore Diameter (D) | 28 mm |
| Outer Bore Diameter Tolerance | -0.004mm to 0 |
| Width (B) | 28 mm (4×7mm) |
| Width Tolerance | -0.2mm to 0 |
| Contact Angle | 25° (15°, 40° Available) |
| Material | Chrome Steel |
| Cage Material | Phenolic |
| Number of Rows | 4 (4× Single Row) |
| Seal Type | Open |
| Temperature Range | -30°C to 150°C |
| Number of bearings in matched set | 4 |
| Tolerance Class | P4A better than P4 (ABEC-7) |
| Weight | 0.06 kg |
| Matched Arrangement | QBC <<>> 4 bearings |
| Universal Matching Bearing | No |
| Preload | L/Light/Class B |
| Dynamic Radial Load | 8060 N |
| Static Radial Load | 5200 N |
| Reference Speed For Grease (r/min) | 68,000 rpm |
| Limiting Speed For Oil (r/min) | 106,000 rpm |
- Engineered for high-precision and high-performance applications
- Very tight tolerances suitable for precise machinery
- Ability to handle both radial and axial loads simultaneously
- High-speed operation with stability
- Low torque and friction for energy efficiency
- Enhanced rigidity for accuracy under heavy loads
- Durability with extended service life
- Effective performance across a wide temperature range
The 71902 ACE/P4AQBCB bearing is a high-precision angular contact ball bearing distinguished by its superior accuracy, load capacity, and reliability. It finds extensive use in:
- Industrial automation for enhancing production efficiency
- Machine tool industry for ensuring machining precision
- Semiconductor manufacturing for maintaining operational stability under extreme conditions
- Medical equipment for long-term stable performance due to excellent friction reduction and corrosion resistance
- Marine, aerospace, and energy sectors
Its versatility makes it an indispensable component across a wide range of demanding industrial applications.
| CERTIFICATE | RoHS & REACH, IATF16949:2016 |
| Feature | High Speed and Stiffness, High Running Accuracy, High Load Carrying Capacity |
| Service | OEM&ODM Customized Services |
| Samples | Please Contact Us |
| Service | Online Support, Professional Service |
| Size | Standard, For custom sizes, please contact us |
| Factory Manufacturer | Yes |
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