S71904 CD/HCP4A Super Precision Single Row Angular Contact Ball Bearing 20x37x9 mm with P4A Precision Grade and Hybrid Ceramic Balls
S71904 CD/HCP4A 20×37×9 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing Hybrid Ceramic Balls High Speed
Super-precision, high-capacity, single row angular contact ball bearing with seals. Featuring precise dimensions, high static load capacity, P4A precision grade, and hybrid ceramic balls, delivers superior performance and reliability for applications requiring high rotational accuracy and stability.
| Part Number | S71904 CD/HCP4A |
| 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 | Hybrid (Chrome Steel Rings, Ceramic Balls) |
| 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 | 0.033 kg |
| Dynamic Radial Load | 6050 N |
| Static Radial Load | 3200 N |
| Reference Speed For Grease (r/min) | 53,000 rpm |
| Limiting Speed For Oil (r/min) | 80,000 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 a wide temperature range
The S71904 CD/HCP4A bearing is distinguished by its high precision and high-speed performance, making it ideal for demanding applications in various industries:
- Electric spindles for high-speed rotation
- High-speed machining centers (both horizontal and vertical) for stable and precise tool head operation
- High-speed milling machines for complex part machining
- High-speed internal grinding machines to handle the loads of rotating wheels and workpieces
- Woodworking machinery for ensuring high-speed operation and machining accuracy
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
Samples: Please Contact Us
Size Options: Standard sizes available, custom sizes upon request
Factory Manufacturer: Yes
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.