S71903 ACD/HCP4A Super Precision Single Row Angular Contact Ball Bearing 7903 2RZ
S71903 ACD/HCP4A 17×30×7 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. The S71903 ACD/HCP4A bearing features precise dimensions, high static load capacity, P4A precision grade, and hybrid ceramic balls, delivering superior performance and reliability for applications requiring high rotational accuracy and stability.
Technical Specifications
| Part Number |
S71903 ACD/HCP4A |
| Bearing Type |
Angular Contact |
| Measurement Unit |
Metric |
| Inner Bore Diameter (d) |
17 mm |
| Inner Bore Diameter Tolerance |
-0.004mm to 0 |
| Outer Bore Diameter (D) |
30 mm |
| Outer Bore Diameter Tolerance |
-0.005mm to 0 |
| Width (B) |
7 mm |
| Width Tolerance |
-0.2mm to 0 |
| Contact Angle |
25° (15°,40° Available) |
| Material |
Hybrid (Chrome Steel Rings, Ceramic Balls) |
| Cage Material |
Phenolic |
| Number of Rows |
1 Single Row |
| Seal Type |
Seal on both side |
| Temperature Range |
-30°C to 150°C |
| Lubrication |
Grease |
| Tolerance Class |
P4A better than P4 (ABEC-7) |
| Weight |
0.015 kg |
| Dynamic Radial Load |
3970 N |
| Static Radial Load |
2000 N |
| Reference Speed For Grease |
56,000 rpm |
| Limiting Speed For Oil |
90,000 rpm |
Performance Features
- 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
Applications
The S71903 ACD/HCP4A bearing, distinguished by its superior performance and precision, is widely used in various industrial applications including:
- Metal cutting machine tools (machining centers, high-speed milling and grinding machines)
- Robotics (delicate operations and semiconductor fault detection)
- Printing machinery
- Measurement devices
- Marine gyro stabilizers
- High-performance automotive components (race car wheel hubs)
Its ability to provide high rotational accuracy, stability, and durability under demanding conditions makes it essential for enhancing efficiency, precision, and safety across these diverse sectors.
Certifications: 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
Factory Manufacturer: Yes