S71912 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71912 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71912 ACDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy, rigidity, and speed. As a single bearing with a 25° contact angle and extra light preload (Class A), it is engineered to handle combined radial and axial loads simultaneously. Its P4A tolerance class and universal matchable (SU) designation ensure exceptional running accuracy and facilitate simplified mounting in pre-determined duplex arrangements. This bearing is ideal for high-reliability, high-performance spindle systems.
S71912 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Super-precision bearing |
| 7 | Angular contact ball bearing |
| 1912 | Dimension series: 19 (width) & 12 (bore code for 60mm) |
| AC | 25° contact angle |
| D | Enhanced internal design for high-speed operation |
| GA | Preload class: Extra Light (Class A) |
| P4A | Tolerance class superior to ABEC 7 (P4), with focused control on width and runout tolerances |
S71912 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized 25° contact angle and robust internal geometry provide excellent resistance to combined loads, ensuring stable performance under demanding conditions.
- Superior High-Speed Performance: The phenolic resin cage offers low weight and excellent sliding properties, contributing to the high limiting speed of 36,000 rpm. The enhanced internal design (denoted by "D") further optimizes lubrication and heat management.
- Exceptional Running Accuracy: Manufactured to P4A super-precision standards with tight bore, outside diameter, and width tolerances, this bearing guarantees minimal vibration and superior positional accuracy for spindle applications.
- Sealed and Pre-Lubricated: The bearing is sealed and pre-lubricated with grease, protecting against contamination and providing reliable, maintenance-free operation within its specified temperature range.
- Universal Matching (SU): This feature allows for simplified assembly of matched bearing sets (typically in sets of 3) to achieve specific preload and stiffness characteristics without selective mounting.
S71912 ACDGA/P4A Bearing Typical Application Areas
The S71912 ACDGA/P4A is ideally suited for high-performance machinery where precision and speed are critical. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-accuracy measuring devices and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Electric spindles for PCB drilling and other high-RPM applications.
- Robotics: High-precision joints and actuators requiring minimal runout and high rigidity.
