71908 CE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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71908 CE/P4ADT Bearing Product Overview & Core Advantages
The 71908 CE/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring ultra-precise rotational accuracy and minimal runout. Its primary advantage lies in its ability to handle combined loads efficiently, providing high rigidity and stability in high-speed operations. The phenolic cage and optimized internal geometry contribute to its superior performance, making it an ideal choice for high-precision machinery.
71908 CE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing series and size designation (40mm bore, 62mm OD, 24mm width) |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity |
| E | Reinforced internal design with increased ball complement and optimized raceway geometry |
| P4A | High precision tolerance class with enhanced dimensional and running accuracy |
| DT | Duplex Tandem arrangement, where two bearings are mounted in tandem to increase axial load capacity in one direction |
71908 CE/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement provides exceptional stiffness and enables the bearing set to withstand significant axial loads in one direction while maintaining radial load capacity. The 15° contact angle is optimized for high-speed performance while providing substantial thrust capacity.
Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal vibration and precise rotational characteristics. The phenolic resin cage offers excellent dimensional stability and low friction, contributing to smooth operation at high speeds up to 56,000 rpm.
Enhanced Durability: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue resistance and long service life. The open design allows for customized lubrication schemes to optimize performance for specific operating conditions within the -30°C to 110°C temperature range.
71908 CE/P4ADT Bearing Typical Application Areas
The 71908 CE/P4ADT is specifically engineered for high-precision applications requiring exceptional accuracy and speed:
- Machine tool spindles for CNC machining centers and precision grinding machines
- High-speed spindles in PCB drilling equipment and precision milling applications
- Precision instruments and measuring equipment requiring minimal runout
- Robotic arm joints and automation equipment demanding high positional accuracy
- Medical equipment spindles and high-speed dental handpieces
