S71902 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71902 CDGA/P4A Bearing Product Overview & Core Advantages
The S71902 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy, high-speed capability, and superior rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads (radial and axial) simultaneously. Its compact 15 mm bore design, combined with an Extra Light (A) preload, ensures minimal friction, low heat generation, and precise shaft positioning, making it ideal for high-reliability and high-precision machinery.
S71902 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| S7 | Indicates a series of super-precision angular contact ball bearings. |
| 1902 | Specifies the bearing size: 15mm bore, 28mm OD, 7mm width. |
| CD | A universal matchable bearing designed to be paired with another identical bearing to form a duplex set with a specific preload. |
| GA | Specifies the preload level: Extra light preload (Class A). |
| P4A | Denotes the tolerance class, signifying very high dimensional and running accuracy exceeding ABEC 7 standards. |
S71902 CDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The 15° contact angle and Extra Light preload provide high axial and radial rigidity, minimizing deflection under load for superior machining or positioning accuracy.
Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry allows for a high limiting speed of 115,000 rpm, making it an excellent high-speed bearing.
Optimized Load Capacity: Engineered to handle combined loads effectively. With a dynamic load rating of 893 lbf and a static load rating of 428 lbf, it offers reliable performance in demanding applications.
Universal Matching Design: The Universal Matchable (SU) "CD" designation means two identical S71902 CDGA/P4A bearings can be universally paired (face-to-face, back-to-back, or tandem) to create a pre-loaded set, simplifying inventory and assembly.
S71902 CDGA/P4A Bearing Typical Application Areas
The S71902 CDGA/P4A is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and high-speed milling applications.
- Precision Instrumentation: Used in measuring devices, optical scanners, and laboratory equipment.
- High-Frequency Spindles: For PCB drilling, dental handpieces, and small tool spindles.
- Robotics: In high-accuracy joints and arm assemblies requiring minimal backlash.
