71952 ACD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
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71952 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The **71952 ACD/P4ATBTB** is a **super-precision angular contact ball bearing** designed for the most demanding industrial applications. This **triplex matched set** in a **back-to-back (TBT) arrangement** is engineered to deliver exceptional **system rigidity** and handle significant **combined loads**, including high radial loads and bidirectional axial loads. Manufactured to the stringent **P4A tolerance class**, it guarantees superior running accuracy and rotational stability, making it ideal for high-speed spindles and other precision machinery requiring maximum performance and reliability.
71952 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
- 71952: Basic bearing designation, indicating a 260mm bore, 360mm OD, and 138mm width.
- ACD: **Angular Contact** design with a **25° contact angle**, optimized for high axial load capacity and speed.
- P4A: Denotes a **super-precision tolerance class** with enhanced dimensional and running accuracy requirements.
- TBT: Specifies the bearing arrangement as a **Triplex (3 bearings) Back-to-Back** matched set, providing high moment rigidity and stability.
- B: Indicates a **Light preload (Class B)** applied to the matched set, ensuring consistent performance and eliminating internal clearance.
71952 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
This bearing's performance is derived from its advanced construction. The **triplex back-to-back configuration** creates a highly rigid bearing system capable of withstanding complex **combined loads** and tilting moments. The **phenolic resin cage** ensures excellent high-speed performance and reduced friction. The specified **light preload (Class B)** eliminates internal play, enhancing positional accuracy and dynamic response. With a **25° contact angle**, it offers a balanced capacity for both radial and axial loads. The **open seal type** allows for customized lubrication schemes to achieve the maximum **limiting speed** of 4,500 rpm, while the high-grade **chrome steel** rings and balls ensure long-term durability under heavy loads.
71952 ACD/P4ATBTB Bearing Typical Application Areas
The 71952 ACD/P4ATBTB is primarily used in high-performance machinery where extreme precision, rigidity, and speed are paramount. Typical applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and high-torque drive systems.
- Industrial Pumps and Compressors requiring high shaft stability.
- Aerospace and Defense positioning systems and test rigs.
