71952 ACD/P4ALDBA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71952 ACD/P4ALDBA Bearing Product Overview & Core Advantages
The 71952 ACD/P4ALDBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a back-to-back (DB) matched arrangement and an extra light preload (Class A), making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously, ensuring stable performance under demanding conditions.
71952 ACD/P4ALDBA Bearing Model Code Explained, Specifications & Naming Convention
- 71952: Basic bearing series and size designation (260mm bore, 360mm OD)
- ACD: Angular Contact design with a 25° contact angle
- P4A: Ultra-precision tolerance class exceeding ABEC 7 standards
- L: Light preload category
- DB: Duplex Back-to-Back matched arrangement
- A: Extra light preload specification (Class A)
71952 ACD/P4ALDBA 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 radial dynamic load rating of 98,100 lbf and static load rating of 180,000 lbf, this bearing delivers exceptional load carrying capacity for its compact dimensions.
Precision Performance: Manufactured to P4A tolerance class standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration. The 25° contact angle optimizes axial load capacity while maintaining good radial performance.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, contributing to the bearing's limiting speed of 4,500 rpm. The lightweight cage design reduces centrifugal forces at high rotational speeds.
Premium Material Construction: Both rings and balls are manufactured from chrome steel for superior hardness and fatigue resistance, ensuring long service life in demanding applications.
71952 ACD/P4ALDBA Bearing Typical Application Areas
The 71952 ACD/P4ALDBA is specifically engineered for high-precision, high-speed applications including:
- Machine tool spindles for milling, grinding, and turning centers
- Precision gearboxes and transmission systems
- High-speed machining centers requiring extreme accuracy
- Industrial pumps and compressors with demanding performance requirements
- Aerospace positioning systems and rotary tables
- Medical equipment spindles where precision and reliability are critical
