S71920 CD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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S71920 CD/P4ADBC Bearing Product Overview & Core Advantages
The S71920 CD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class metric bearing is preloaded and matched as a set, enabling it to handle combined radial and axial loads simultaneously with high stability. Its compact design and superior construction make it ideal for high-speed, high-reliability machinery where precision is paramount.
S71920 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision angular contact ball bearing series.
- 1920: Standard size designation (Bore: 100mm, OD: 140mm, Width: 40mm).
- CD: Duplex Back-to-Back (DB) arrangement with Moderate preload (Class C).
- P4A: High precision tolerance class, exceeding ABEC 7/ISO P4 standards.
- DBC: Indicates the bearing is one of a matched set of two bearings.
S71920 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, providing exceptional operational stability for spindles and precise axes.
Superior Load Capacity: Engineered with a 15° contact angle and high-grade chrome steel components, this bearing is optimized to carry significant combined loads.
Optimized High-Speed Performance: The lightweight phenolic resin cage ensures smooth operation and low centrifugal forces, contributing to the high limiting speed of 16,250 rpm. The standard grease lubrication is suitable for this operational range.
Sealed & Ready-to-Use: As a sealed bearing, it is protected from contamination and comes pre-lubricated, offering long service life and reduced maintenance needs within its specified temperature range of -30°C to 110°C.
S71920 CD/P4ADBC Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Control Systems
