S71911 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71911 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71911 CD/P4ADBA is a metric precision double row angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered with P4A tolerance class and an extra light preload (Class A), this bearing is optimized for high-speed operation up to 34,000 rpm while providing superior support against combined radial and axial loads. Its sealed, grease-lubricated, and matched duplex back-to-back (DB) configuration offers a compact, pre-adjusted, and highly reliable solution for critical machinery.
S71911 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7: Denotes a series of high-precision angular contact ball bearings.
- 1911: Standard size designation (55mm bore, 80mm OD, 26mm width).
- CD: Indicates a duplex (two-bearing) set in a Back-to-Back (DB) arrangement.
- P4A: Specifies the tolerance class (P4A), indicating very high dimensional and running accuracy.
- DBA: Further defines the matched set with extra light preload (Class A).
S71911 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design and duplex back-to-back (DB) mounting create a rigid bearing system that effectively withstands combined loads and moment loads, ensuring stable shaft positioning.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 15° contact angle and a lightweight phenolic resin cage, the bearing achieves smooth operation and minimal vibration at high rotational speeds.
Sealed & Ready-to-Use: The integrated seals retain the factory-applied grease lubrication, protecting against contamination and providing long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71911 CD/P4ADBA Bearing Typical Application Areas
This high-precision bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Industrial Pumps and Compressors
- Medical and Laboratory Instruments
