S71907 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71907 ACB/P4A Bearing Product Overview & Core Advantages
The S71907 ACB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a single-row bearing, it is engineered to accommodate high combined loads, primarily thrust loads in one direction, while also handling significant radial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing comes pre-lubricated and features a phenolic cage, contributing to its high limiting speed and reliable performance in demanding operational environments.
S71907 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71907 | Denotes the bearing series and size. 'S' typically indicates a high-precision series. '71907' specifies a metric bore diameter of 35mm, outside diameter of 55mm, and width of 10mm. |
| ACB | Angular Contact Bearing with a 25° contact angle and specific internal design for optimal load distribution. |
| P4A | Specifies the tolerance class P4 (ABEC-7), denoting very high dimensional and running accuracy. The 'A' suffix may indicate a specific preload or internal clearance group. |
S71907 ACB/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications like machine tool spindles. The 25° contact angle is optimized to support high thrust loads effectively.
Superior Load Capacity: The single-row design with a high-grade chrome steel construction provides excellent dynamic and static load ratings (1098 lbf / 776 lbf), enabling reliable operation under significant combined loads.
High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, allowing for a high limiting speed of 30,000 rpm. This makes the bearing suitable for very high-speed applications.
Optimized for Performance: The bearing is pre-lubricated and sealed, protecting against contamination and ensuring long-term, maintenance-free operation within its specified temperature range.
S71907 ACB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision grinding, milling, and drilling spindles.
- High-Speed Motors: Spindles for routers and other high-RPM equipment.
- Precision Instrumentation: Medical devices, optical scanners, and measuring equipment.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical components requiring high accuracy and reliability.
