S71919 ACD/HCP4AQBCB
Hybrid Ceramic Super Precision Bearings
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S71919 ACD/HCP4AQBCB Bearing Product Overview & Core Advantages
The S71919 ACD/HCP4AQBCB is a high-precision quadruplex matched bearing set engineered for demanding applications requiring exceptional rigidity and accuracy. This metric angular contact ball bearing configuration features a back-to-back (QBC) arrangement of four bearings, providing superior stability and moment load capacity. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, outstanding high-speed performance facilitated by a phenolic cage and ceramic balls, and long-term reliability due to its sealed and pre-lubricated design. This set is ideal for high-rigidity, high-precision spindles and other critical machinery.
S71919 ACD/HCP4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
- S7: Indicates a high-precision bearing design.
- 1919: Standard size designation (Bore: 95mm, OD: 130mm, Width: 18mm per bearing).
- ACD: Angular Contact design with a 25° contact angle.
- HCP4A: Denotes the tolerance class P4A (very high precision) and specific internal design features.
- QBC: Specifies the Quadruplex Back-to-Back matched set arrangement.
- B: Indicates a Light preload (Class B) applied to the set.
S71919 ACD/HCP4AQBCB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid system capable of withstanding heavy combined loads and significant moment loads, making it ideal for precision spindle applications.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic cage (lightweight and robust) enables a high limiting speed of 21,000 rpm.
- High Precision Operation: Manufactured to P4A tolerance class, this set ensures minimal runout and vibration, which is critical for achieving superior surface finishes and machining accuracy.
- Maintenance-Free & Long Service Life: The bearings are sealed and pre-lubricated with grease, protecting against contamination and providing reliable operation across a wide temperature range from -30°C to 110°C.
S71919 ACD/HCP4AQBCB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Other high-precision, high-rigidity rotary systems requiring maximum stability.
