71903 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71903 CE/P4A Bearing Product Overview & Core Advantages
The 71903 CE/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads, accommodating significant axial loads in one direction alongside radial loads. Its compact design, featuring a 7 mm width, makes it ideal for space-constrained, high-speed machinery. The phenolic resin cage and preloaded configuration contribute to its high-speed capability and operational stability, making it a superior choice for demanding, precision-critical environments.
71903 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 71903: Basic model number indicating a metric, single-row angular contact bearing with a 17 mm bore, 30 mm OD, and 7 mm width.
- CE: Denotes a contact angle of 15° and is typically associated with a specific internal design and preload level for high rigidity.
- P4A: Specifies the tolerance class P4 (ABEC-7), indicating very high dimensional and running accuracy. The 'A' suffix often indicates specific internal clearance or preload optimizations for precision applications.
71903 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance standards, this bearing ensures minimal runout and vibration, providing the high rigidity necessary for precise spindle applications.
- Optimized Load Capacity: The 15° contact angle is engineered to handle combined radial and axial loads efficiently, offering reliable performance under complex loading conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures stability and reduced centrifugal forces, enabling a high limiting speed of 106,000 rpm. The bearing is pre-lubricated for immediate operation.
- Durable Material Construction: Components made from chrome steel provide high wear resistance and durability, ensuring a long service life in demanding operational environments.
71903 CE/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Grinding and Milling Heads
- Precision Instruments and Measuring Devices
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
