71909 ACDTP/P4B
71900 Series Super Precision Angular Contact Ball Bearings
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71909 ACDTP/P4B Bearing Product Overview & Core Advantages
The 71909 ACDTP/P4B is a single-row angular contact ball bearing designed for applications demanding high precision and superior rigidity. Engineered to accommodate combined loads (radial and axial loads in one direction), this bearing features a 25° contact angle optimized for high axial load capacity. Manufactured to P4 (ABEC-7) tolerance class with phenolic cage and preloaded configuration, it delivers exceptional rotational accuracy and stability, making it ideal for high-speed, high-rigidity applications where precise shaft positioning is critical.
71909 ACDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series designation for metric angular contact ball bearings |
| AC | Angular Contact design with optimized internal geometry |
| D | High contact angle (25°) for enhanced axial load capacity |
| TP | Phenolic (synthetic resin) cage for reduced weight and superior high-speed performance |
| P4B | P4 precision class (ABEC-7 equivalent) with specific internal clearance and geometric tolerances |
71909 ACDTP/P4B Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The single-row angular contact design with 25° contact angle provides optimal stiffness for precise shaft guidance. Manufactured to P4 tolerance class, it ensures minimal runout and vibration for superior positioning accuracy.
Enhanced Load Capacity: Engineered to handle combined radial and axial loads simultaneously, with a dynamic load rating of 2790 lbf and static load rating of 2025 lbf. The optimized raceway geometry distributes stress evenly for extended service life.
High-Speed Performance: The phenolic cage offers excellent strength-to-weight ratio and centrifugal stability, enabling limiting speeds up to 17,000 rpm. The open design facilitates efficient lubrication management at high rotational speeds.
Precision Engineering: Manufactured from chrome steel with precisely controlled bore diameter (45 mm) and outside diameter (68 mm) tolerances. The bearing comes preloaded for immediate optimal performance without additional adjustment.
71909 ACDTP/P4B Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- High-Speed Motors: Electric spindle motors, high-frequency motors, and servo drives
- Precision Instruments: Measuring equipment, optical instruments, and laboratory apparatus
- Robotics: Industrial robot joints, precision actuators, and automated guidance systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft control mechanisms
