S71904 CD/P4A Super Precision Single Row Angular Contact Ball Bearing with P4A Precision Grade 20x37x9 mm for High Speed Operation
S71904 CD/P4A 20×37×9 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing - High Speed
Super-precision, high-capacity, single row angular contact ball bearing with seals. The S71904 CD/P4A bearing features a bore diameter of 20 mm, outside diameter of 37 mm, and width of 9 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 | S71904 CD/P4A |
| Bearing Type | Angular Contact |
| Measurement Unit | Metric |
| Inner Bore Diameter (d) | 20 mm |
| Inner Bore Diameter Tolerance | -0.005mm to 0 |
| Outer Bore Diameter (D) | 37 mm |
| Outer Bore Diameter Tolerance | -0.006mm to 0 |
| Width (B) | 9 mm |
| Width Tolerance | -0.2mm to 0 |
| Contact Angle | 15° (25°, 40° Available) |
| Material | Chrome Steel |
| Cage Material | Phenolic |
| Number of Rows | 1 Single Row |
| Seal Type | Seal on both sides |
| Temperature Range | -30°C to 150°C |
| Lubrication | Grease |
| Tolerance Class | P4A better than P4 (ABEC-7) |
| Weight | 0.037 kg |
| Dynamic Radial Load | 6050 N |
| Static Radial Load | 3200 N |
| Reference Speed For Grease | 45,000 rpm |
| Limiting Speed For Oil | 67,000 rpm |
- 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 wide temperature range
The S71904 CD/P4A bearing excels in high-speed machining equipment and precision machine tools such as electric spindles, high-speed machining centers, and milling machines. Its sealed design and P4A precision make it suitable for industrial machinery including textile machinery and steel rolling mills. The bearing's high rigidity and low friction characteristics, along with suitability for precision instruments and applications requiring high preload control, ensure optimal performance across demanding applications.
Certificates: RoHS & REACH, IATF16949:2016
Features: High Speed and Stiffness, High Running Accuracy, High Load Carrying Capacity
Services: OEM & ODM Customized Services, Online Support, Professional Service
Sizes: Standard sizes available, custom sizes upon request
Manufacturer: Factory Direct
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