71909 CE/P4A Super Precision Single Row Angular Contact Ball Bearing 45x68x12 mm High Speed P4A Precision Grade
71909 CE/P4A 45×68×12 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing - High Speed
Super-precision, high-speed B design, single row angular contact ball bearing featuring precise dimensions, high static load capacity, P4A precision grade, delivering superior performance and reliability for applications requiring high rotational accuracy and stability.
| Part Number | 71909 CE/P4A |
|---|---|
| Bearing Type | Angular Contact |
| Measurement Unit | Metric |
| Inner Bore Diameter (d) | 45 mm |
| Inner Bore Diameter Tolerance | -0.006mm to 0 |
| Outer Bore Diameter (D) | 68 mm |
| Outer Bore Diameter Tolerance | -0.007mm to 0 |
| Width (B) | 12 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 | Open |
| Temperature Range | -30°C to 150°C |
| Lubrication | Grease or Oil |
| Tolerance Class | P4A better than P4 (ABEC-7) |
| Weight | 0.13 kg |
| Dynamic Radial Load | 10400 N |
| Static Radial Load | 6800 N |
| Reference Speed For Grease | 29,000 rpm |
| Limiting Speed For Oil | 44,000 rpm |
The 71909 CE/P4A angular contact ball bearing is engineered for high-precision and high-performance applications, featuring:
- 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 71909 CE/P4A precision angular contact ball bearing is primarily used in industrial scenarios requiring high precision and high-speed operation:
- Machine Tool Spindles - Supports high-speed rotation in machine tools, ensuring accuracy and stability
- Aerospace - Used in aircraft engines and flight control systems, handling extreme conditions
- Wind Turbines - Works in gearboxes and main shafts, enduring heavy loads and long-term use
- Mining & Construction - Fits in mining machinery (e.g., crushers) and construction equipment (e.g., excavators), resisting heavy loads and vibrations
- Medical & Optical Devices - Provides low noise and high precision for CT scanners, surgical tools, and optical instruments
- Automotive & Robotics - Used in car manufacturing lines, robot joints, and electric vehicle motors
- Semiconductor Equipment - Ensures precise motion control in semiconductor machines like wafer cutters
- Other Industries - Suitable for textile, printing, and food processing machinery requiring reliability
If you need more detailed information, feel free to ask!
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