71907 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71907 ACE/P4A Bearing Product Overview & Core Advantages
The 71907 ACE/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction and combined loads, this bearing features a P4 (ABEC-7) tolerance class for superior running accuracy. Its compact design, with a 25° contact angle, provides high rigidity and is ideal for high-speed operation, making it a reliable choice for demanding, precision machinery.
71907 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 10mm width). |
| ACE | Designates a 25° contact angle and optimized internal geometry for high-speed performance. |
| P4A | Indicates a P4 tolerance class (equivalent to ABEC-7), signifying very high precision for spindle and other critical applications. |
71907 ACE/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration. The 25° contact angle provides optimal stiffness for resisting axial loads, enhancing the stability of the entire assembly.
High-Speed Capability: The use of a lightweight, durable phenolic resin cage reduces centrifugal forces, allowing for a high limiting speed of 50,000 rpm. The open design facilitates efficient lubrication management at high rotational speeds.
Superior Load Capacity: With a dynamic load rating of 1638 lbf and a static load rating of 990 lbf, it reliably handles significant axial and combined loads. The bearing is supplied prelubricated for immediate operation.
Material Quality: Components made from high-grade chrome steel ensure excellent wear resistance and long service life, even in demanding operating conditions.
71907 ACE/P4A Bearing Typical Application Areas
The 71907 ACE/P4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aviation and Aerospace Instrumentation
