71919 CD/HCP4AQBCC
Hybrid Ceramic Super Precision Bearings
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71919 CD/HCP4AQBCC Bearing Product Overview & Core Advantages
The 71919 CD/HCP4AQBCC is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric bearing features a back-to-back (QBC) matched arrangement of four bearings, enabling it to withstand combined radial and axial loads from multiple directions simultaneously. Manufactured to P4A super-precision tolerance and utilizing ceramic balls, it delivers superior performance in high-speed and high-rigidity scenarios. The moderate preload (Class C) ensures optimal stiffness and rotational accuracy right from installation.
71919 CD/HCP4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
- 71919: Basic bearing series and size designation (95mm bore, 130mm OD, 72mm width).
- CD: Indicates a duplex (two-bearing) set with a specific internal preload and clearance. In this context, it forms the building block for the quadruplex set.
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: Specifies the tolerance class, indicating very high precision levels for runout and dimensional accuracy.
- QBCC: Defines the matched arrangement as a Quadruplex Back-to-Back (QBC) set. The "C" suffix typically relates to the specific preload and internal clearance achieved in this quadruplex configuration.
71919 CD/HCP4AQBCC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that can handle significant moment loads and complex combined loads. The 15° contact angle is optimized for supporting substantial axial loads in both directions while maintaining good radial load capacity.
High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic resin cage allows for a high limiting speed of 16,000 rpm. This makes it suitable for high-speed spindle applications.
Super-Precision Operation: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, ready for installation and operation within its specified temperature range of -30°C to 110°C.
71919 CD/HCP4AQBCC Bearing Typical Application Areas
This high-performance bearing is engineered for the most demanding machinery, including:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and machining centers)
- Precision Grinding Spindles
- High-Rigidity Industrial Robots and automation equipment
- Advanced Medical Equipment spindles
- Aerospace Test and positioning equipment
