71934 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71934 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71934 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined loads, including high radial loads and bidirectional axial loads. Manufactured to P4A tolerance class, it ensures extremely tight dimensional and running accuracy, making it ideal for high-speed, high-precision spindles and other critical machinery where high rigidity and minimal runout are paramount.
71934 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71934: Basic bearing designation indicating a metric, light series angular contact ball bearing.
- A: Denotes a 25° contact angle, optimized for supporting high axial loads.
- C: Indicates the bearing is manufactured from Chrome Steel for high durability.
- D: Specifies a Duplex Back-to-Back (DB) pre-assembled set.
- P4A: The tolerance class, signifying ultra-precision levels for both dimensional and running accuracy.
- DB: Confirms the Back-to-Back mounting arrangement.
- A: Indicates an Extra Light preload for minimal friction and optimal high-speed performance.
71934 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a rigid bearing system that effectively resists moment loads. This setup, combined with a 25° contact angle, provides excellent capability for handling combined radial and axial loads from both directions.
Precision & High-Speed Performance: Built to P4A tolerance class with a phenolic resin cage, this bearing offers exceptional running accuracy and stability. The phenolic cage is lightweight, contributing to lower centrifugal forces and enabling higher limiting speeds (16,250 rpm). The extra light preload (Class A) ensures smooth operation with minimal heat generation at high velocities.
Material & Durability: Both rings and balls are made from high-grade Chrome Steel, providing excellent wear resistance and long service life under demanding conditions.
71934 ACD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: Where precise shaft positioning and load capacity are critical.
- High-Frequency Motors and Spindles: Applications in PCB drilling and semiconductor manufacturing equipment.
- Industrial Pumps and Compressors: For high-performance models that operate at elevated speeds.
