71901 ACEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71901 ACEGB/P4A Bearing Product Overview & Core Advantages
The 71901 ACEGB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Manufactured to the exacting P4A tolerance class, it is engineered for universal matching (SU), allowing two bearings to be mounted together in a back-to-back (DB) or face-to-face (DF) arrangement to handle combined loads. Its compact design, featuring a 12 mm bore and 6 mm width, makes it ideal for space-constrained, high-performance assemblies. The bearing is pre-lubricated and features a light preload (Class B) for immediate, precise operation with minimal runout.
71901 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series, indicating a high-precision, single-row angular contact ball bearing with a 12mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| E | Optimized internal design for high stiffness and high-speed capability. |
| GB | Specifies a Light Preload / Class B. |
| P4A | The tolerance class, denoting very high dimensional and running accuracy exceeding ABEC 7. |
71901 ACEGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4A tolerance class ensures minimal dimensional variation and exceptional running accuracy. The 25° contact angle and optimized internal geometry provide high axial and radial stiffness, crucial for precise positioning.
- Superior High-Speed Performance: The phenolic resin cage is lightweight and robust, enabling stable operation at the high limiting speed of 140,000 rpm. The universal matchable (SU) design allows for precise axial preload control in paired sets, further enhancing high-speed stability.
- Optimized Load Capacity: As an angular contact ball bearing, it is designed to support combined radial and axial loads simultaneously. The dynamic load rating of 457 lbf and static load rating of 191 lbf confirm its reliability in demanding applications.
- Ready-to-Install & Reliable: The bearing is supplied pre-lubricated, ensuring immediate startup and smooth operation within its specified temperature range of -30°C to 110°C.
71901 ACEGB/P4A Bearing Typical Application Areas
The 71901 ACEGB/P4A is ideally suited for high-speed, high-precision machinery and systems, including:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Motors and encoders
- Medical and Dental Handpieces
- Instrumentation and laboratory equipment
- Aerospace auxiliary systems
