S71926 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71926 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71926 ACDGA/P4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing with a 25° contact angle and Extra Light (A) preload, it delivers exceptional rotational accuracy and system stability. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously while operating at limiting speeds up to 11,000 rpm. Manufactured to the stringent P4A tolerance class, this bearing is the ideal choice for machine tool spindles and other precision equipment where uncompromising performance is critical.
S71926 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: Indicates a series of high-precision, high-speed angular contact ball bearings.
- 1926: Specifies the standard size, with a 130 mm bore, 180 mm outside diameter, and 24 mm width.
- AC: Signifies Angular Contact design with a 25° contact angle.
- D: Denotes a phenolic resin cage.
- GA: Indicates the bearing is preloaded in an Extra Light (A) preload class.
- P4A: Defines the tolerance class, equivalent to ABEC 7, ensuring extremely tight dimensional and running accuracy.
S71926 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single bearing design with a specified preload eliminates internal clearance, providing superior system stiffness and minimizing deflection under load, which is essential for high-precision machining.
Optimized for High-Speed Operation: The lightweight phenolic cage (D) ensures excellent dimensional stability and low friction at high rotational speeds, contributing directly to the high limiting speed of 11,000 rpm.
Superior Load Capacity: With a dynamic load rating of 19,598 lbf and a static load rating of 22,950 lbf, this bearing reliably sustains significant combined loads.
Universal Matching Capability (SU): This feature allows multiple bearings to be universally matched in sets (up to 4 in this case) to achieve optimal preload and performance in complex arrangements, simplifying installation and enhancing system performance.
S71926 ACDGA/P4A Bearing Typical Application Areas
The S71926 ACDGA/P4A is predominantly used in high-performance applications requiring extreme precision and speed, including:
- Machine Tool Spindles (for milling, grinding, and turning centers)
- High-frequency Spindle Motors
- Precision Instrumentation
- High-speed Robotic Drives
