71936 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71936 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71936 ACD/P4ADBA is a super-precision angular contact ball bearing designed for the most demanding applications. Operating under P4A tolerance class, this metric bearing delivers exceptional rotational accuracy and dimensional stability. Its duplex back-to-back (DB) matched arrangement provides superior rigidity and excellent capability to handle combined loads, including significant radial and axial loads in both directions. The extra light preload (Class A) ensures minimal friction and optimal performance in high-speed scenarios, making it an ideal choice for machine tool spindles and other high-precision, high-rigidity systems.
71936 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71936: Basic bearing series and size designation (180mm bore, 250mm OD)
- A: 25° contact angle, optimized for high axial load capacity
- C: Extra light preload (Class A)
- D: Duplex back-to-back (DB) mounting arrangement
- P4A: Super-precision tolerance class exceeding ABEC 7 standards
- DBA: Specific manufacturing and matching specifications for the duplex set
71936 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads. With a 25° contact angle and dynamic load rating of 58,500 lbf, this bearing excels at handling combined radial and axial loads simultaneously.
Precision Performance: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures minimal runout and vibration for superior machining quality.
High-Speed Capability: The phenolic resin cage and optimized internal design enable a limiting speed of 16,250 rpm, making it suitable for high-speed spindle applications.
Thermal Stability: The phenolic cage material provides excellent dimensional stability across the operating temperature range of -30°C to 110°C, maintaining precision under thermal variations.
71936 ACD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision
- Precision Gearboxes: Industrial transmission systems demanding high rigidity and accuracy
- Aerospace Components: Critical rotating assemblies in aircraft systems
- Medical Equipment: High-speed dental handpieces and surgical tools
- Robotic Systems Precision joints and rotary axes in industrial robotics
- Test & Measurement Equipment: Rotary tables and precision positioning systems
