71903 CE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71903 CE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 71903 CE/HCPA9ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a 15° contact angle and extra light preload (Class A), making it ideal for applications requiring minimal deflection and high running accuracy. Its ceramic ball construction and PA9A tolerance class ensure superior performance in high-speed and high-rigidity scenarios. The bearing is pre-lubricated and operates effectively within a wide temperature range, offering reliable performance in precision spindles and other critical machinery.
71903 CE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 71903: Basic series code for a high-precision, small-bore angular contact ball bearing.
- C: Represents a 15° contact angle.
- E: Indicates enhanced internal design and optimized internal geometry for superior performance.
- /HC: Signifies the use of Hybrid Ceramic balls (Silicon Nitride).
- PA9A: Denotes the tolerance class, specifying extremely tight dimensional and running accuracy tolerances.
- DGA: Indicates a Universal Matchable (SU) bearing designed for Duplex (DB/DF/DT) arrangements with an Extra Light (Class A) preload.
71903 CE/HCPA9ADGA Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Performance: The combination of ceramic balls and a phenolic resin cage significantly reduces centrifugal forces and friction, enabling very high limiting speeds (up to 80,000 rpm). The 15° contact angle and extra light preload provide high rigidity with minimal heat generation, which is critical for precision spindle applications.
Superior Accuracy and Load Capacity: Manufactured to PA9A tolerance class, this bearing ensures exceptional dimensional stability and running accuracy. It is capable of supporting combined loads (radial and axial) simultaneously, with a dynamic load rating of 1244 lbf and a static load rating of 686 lbf.
Universal Matching Capability: As a Universal Matchable (SU) bearing, any two bearings can be paired in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements without selective matching, simplifying installation and inventory management while providing increased system rigidity.
71903 CE/HCPA9ADGA Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Dental and Medical Handpiece Drives
- Aerospace Instrumentation
- Semiconductor Manufacturing Equipment
