S71926 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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S71926 CD/P4A Bearing Product Overview & Core Advantages
The S71926 CD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing manufactured to a P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and simultaneous one-direction axial loads—thanks to its defined 15° contact angle. The bearing comes preloaded and pre-lubricated from the factory, ensuring immediate high performance, simplified installation, and is ideal for high-speed spindles and other high-reliability machinery.
Model Code Breakdown
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1926: Specifies the size series, with a 130 mm bore, 180 mm outside diameter, and 24 mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation.
- D: Signifies that the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning.
- P4A: Designates the tolerance class P4 (ABEC-7), guaranteeing extremely tight dimensional and running accuracy.
S71926 CD/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: The P4 tolerance class and preload (D) work in concert to minimize axial and radial runout, providing exceptional shaft guidance and system stiffness, which is critical for machining accuracy.
Optimized Load Capacity: The 15° contact angle (C) is engineered to efficiently handle combined loads, offering a high radial dynamic load rating of 20,768 lbf and substantial thrust capacity in one direction.
Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 7,000 rpm. This, combined with the optimized internal design, ensures stable operation at high rotational velocities.
Ready-to-Install and Sealed: The bearing is sealed to protect against contamination and is pre-lubricated, making it a maintenance-free solution for the specified operating temperature range (-30°C to 110°C).
S71926 CD/P4A Bearing Typical Application Areas
The S71926 CD/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motors and spindles.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
