71936 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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71936 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71936 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched pair in a Back-to-Back (DB) arrangement is preloaded to provide high rigidity and stable rotational accuracy under combined loads, including significant radial and axial forces. Manufactured to a P4A tolerance class, it guarantees superior running precision, making it ideal for high-speed spindles and other critical machinery where performance and reliability are paramount.
71936 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 71936: Basic bearing series and size designation (180mm bore, 250mm OD).
- A: Denotes a 25° contact angle, optimized for carrying high axial loads.
- C: Indicates a Moderate Preload (Class C) for enhanced system rigidity.
- D: Specifies a Duplex (two-bearing) set.
- P4A: The tolerance class, signifying very high precision for dimensional and running accuracy.
- DB: Defines the Back-to-Back mounting arrangement, which provides high moment rigidity.
- C: (In P4ADBC) Confirms the Moderate Preload on the matched set.
71936 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement and moderate preload create an exceptionally stiff bearing system capable of withstanding heavy combined radial and axial loads and resisting moment loads. The 25° contact angle is specifically engineered for high axial load carrying capacity.
Precision & High-Speed Performance: Built to P4A tolerance class, this bearing ensures minimal runout and smooth operation. The lightweight phenolic resin cage contributes to lower inertia, facilitating a high limiting speed of 16,250 rpm. The open seal type allows for optimal lubrication flow and heat dissipation in high-speed applications.
Durability & Reliability: Components made from chrome steel provide high hardness and fatigue resistance. The bearing is supplied lubricated and ready for installation, operating effectively within a temperature range of -30°C to 110°C.
71936 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high speed and accuracy.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors that experience significant axial thrust.
- Aerospace and Defense positioning systems.
