71914 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71914 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71914 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to P4A tolerance class with a light preload (Class B), it is engineered for high-speed operation and precise positioning in demanding industrial environments. Its compact design and phenolic cage contribute to its high performance and reliability.
71914 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71914 | Basic bearing series and size designation (70mm bore, 100mm OD) |
| AC | Angular Contact design with a 25° contact angle |
| D | Duplex Back-to-Back (DB) matched arrangement |
| P4A | High Precision Tolerance Class (exceeding ABEC 7) |
| DBB | Specific internal clearance and preload designation for light preload |
71914 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back configuration creates a wide effective spread between load centers, significantly increasing system rigidity and moment load capacity. This makes the bearing exceptionally stable under combined loads.
Superior Precision: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and precise rotational accuracy for critical applications.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 28,000 rpm.
Optimized Load Capacity: With a 25° contact angle and 24 precision balls, this bearing delivers excellent radial dynamic load rating of 11,858 lbf and static load rating of 14,400 lbf, suitable for demanding applications.
Temperature Performance: Chrome steel construction and phenolic cage allow reliable operation across a temperature range of -30°C to 110°C.
71914 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring exceptional accuracy and rigidity, including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial robotics and automation systems
- Medical Equipment - High-speed dental handpieces and surgical tools
- Aerospace Components - Guidance systems and auxiliary power units
- Test & Measurement Equipment - Coordinate measuring machines and optical instruments
