71919 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71919 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71919 CD/P4ADBB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B specifications, delivering superior system stiffness and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously. Manufactured to the exacting P4A tolerance class, it is the ideal choice for high-precision, high-reliability machinery where uncompromising performance is critical.
71919 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
- 71919: Basic designation indicating a 95 mm bore, 130 mm OD, and 36 mm width.
- C: Denotes a 15° contact angle, optimized for high axial load capacity.
- D: Indicates the bearing is part of a duplex (paired) set.
- P4A: Specifies the tolerance class, representing very high precision for bore, outer diameter, and width, with restricted runout tolerances.
- DB: Defines the matched arrangement as Back-to-Back. This configuration provides high moment rigidity and is excellent for stabilizing shafts under complex load conditions.
- B: Indicates the Light preload applied to the matched set, ensuring consistent performance and eliminating internal clearance.
71919 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 17,842 lbf, this bearing is engineered to sustain high-speed operations under significant combined radial and axial loads.
Precision & Speed Performance: Built to P4A super-precision standards and featuring a lightweight phenolic resin cage, the bearing achieves a high limiting speed of 16,000 rpm with minimal friction and heat generation.
Material & Construction: Components made from high-grade chrome steel offer excellent wear resistance and durability, contributing to a long service life in demanding environments.
71919 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is specifically engineered for advanced machinery where accuracy and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Robotic Drives.
- High-Frequency Motors and Spindles.
- Medical Equipment such as high-speed dental handpieces and imaging scanners.
- Aerospace Actuation Systems and Instrumentation.
