71928 CD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71928 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71928 CD/P4ADGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, this bearing is optimized to handle combined loads (radial and axial) simultaneously. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement, providing superior system stability. The phenolic cage and moderate preload (Class C) contribute to smooth, high-speed operation up to 11,000 rpm, making it an ideal choice for high-performance machinery where reliability and precision are critical.
71928 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
- 71928: Basic designation indicating a 140mm bore, 190mm OD angular contact bearing
- C: Represents a 15° contact angle, optimized for high-speed applications with combined loads
- D: Indicates the bearing is supplied as part of a universally matchable pair
- P4A: Denotes super precision tolerance class with enhanced running accuracy
- DGC: Specifies moderate preload (Class C) for optimal rigidity in universal matching arrangements
71928 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 15° contact angle and universal matching capability enables the bearing to handle significant radial and axial loads simultaneously. The moderate preload eliminates internal clearance, ensuring high system rigidity and precise shaft positioning.
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at limiting speeds of 11,000 rpm. The optimized internal geometry minimizes friction and heat generation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71928 CD/P4ADGC Bearing Typical Application Areas
The 71928 CD/P4ADGC is ideally suited for high-precision, high-speed applications including:
- Machine Tool Spindles: Providing high rigidity and accuracy for milling, grinding, and turning centers
- Precision Gearboxes: Supporting high-speed shafts in industrial transmission systems
- High-Frequency Motors: Enabling stable rotation in advanced motor applications
- Aerospace Components: Used in auxiliary systems requiring reliable high-speed performance
- Medical Equipment: Supporting precision rotary components in diagnostic and surgical devices
