71914 ACD/P4ATGA
71900 Series Super Precision Angular Contact Ball Bearings
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71914 ACD/P4ATGA Bearing Product Overview & Core Advantages
The 71914 ACD/P4ATGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. Operating under the stringent P4A tolerance class, this bearing is engineered to provide exceptional running accuracy and dimensional stability. Its 25° contact angle and universal matchable (SU) design enable it to accommodate combined radial and axial loads efficiently. The phenolic cage and optimized internal geometry contribute to superior high-speed performance, making it an ideal solution for machine tool spindles and other precision machinery where high rigidity and low operational vibration are critical.
71914 ACD/P4ATGA Bearing Model Code Explained, Specifications & Naming Convention
- 71914: Basic series designation, indicating a super-precision, light-weight angular contact ball bearing with a 70mm bore, 100mm OD, and 48mm width.
- AC: Angular Contact design.
- D: Signifies a high rigid internal design and contact angle of 25°.
- P4A: Denotes the tolerance class, specifying extremely tight dimensional and running accuracy tolerances superior to ABEC 7/ISO P4.
- T: Indicates the cage material is phenolic resin, which is lightweight and ideal for high-speed operation.
- GA: Specifies a universal matchable (SU) bearing, pre-set for a specific preload when mounted in a group (e.g., duplex or triplex sets).
71914 ACD/P4ATGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and robust construction provides high axial and radial rigidity, enabling stable performance under combined loads.
Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is paramount for applications requiring ultra-high rotational accuracy.
High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and extra light preload (Class A) allow for a high limiting speed of 28,000 rpm.
Universal Matching: As a Universal Matchable (SU) bearing, it can be paired in various arrangements (back-to-back, face-to-face, or tandem) to achieve specific stiffness and preload requirements without selective matching.
71914 ACD/P4ATGA Bearing Typical Application Areas
The 71914 ACD/P4ATGA is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Precision Instrumentation: Applications in medical devices, optical scanners, and coordinate measuring machines.
- Aerospace Systems: Gyroscopes, navigation systems, and other critical rotational components.
