71918 CE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71918 CE/P4ADBB Bearing Product Overview & Core Advantages
The 71918 CE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B standards, ensuring high system stiffness and minimal axial and radial runout. Its P4A tolerance class guarantees superior dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery where combination loads (simultaneous radial and axial forces) are present. The open design, lubricated for immediate operation, offers versatility for custom lubrication systems.
71918 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
- 71918: Basic bearing series and size designation (90mm bore, 125mm OD, 36mm width).
- CE: Indicates a high-precision, 15° contact angle design, optimized for high-speed operation and rigid support.
- P4A: Denotes an ABEC 7 / ISO P4 precision class with enhanced width and radial runout tolerances for superior performance.
- DBB: Specifies the Duplex Back-to-Back (DB) mounting arrangement. This configuration provides high moment rigidity and is excellent for withstanding overturning moments.
71918 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) matched set creates a highly rigid bearing system capable of supporting significant combination loads. The preload eliminates internal clearance, enhancing stiffness and rotational accuracy under complex loading conditions.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 15° contact angle, this bearing ensures smooth, precise, and quiet operation at high speeds. The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and higher limiting speeds (15,000 rpm).
Superior Material & Construction: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and durability. The matched set of two bearings ensures optimal performance and simplified installation.
71918 CE/P4ADBB Bearing Typical Application Areas
This high-precision bearing is engineered for advanced machinery and systems, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Medical Equipment such as dental handpieces and imaging scanners.
- Aerospace & Defense instrumentation and control systems.
- Robotic Arm Joints and other automation components requiring high positional accuracy.
