71917 ACD/P4ATGA
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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71917 ACD/P4ATGA Bearing Product Overview & Core Advantages
The 71917 ACD/P4ATGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universally matchable (SU) bearing supplied in a set of three, it enables optimized preload configurations for superior system performance. Its key advantages include the ability to handle combined loads (radial and axial), high operational stability due to the P4A tolerance class, and excellent high-speed capabilities supported by its phenolic cage and factory-applied lubrication.
71917 ACD/P4ATGA Bearing Model Code Explained, Specifications & Naming Convention
- 71917: Basic designation indicating a 85 mm bore, 120 mm OD, 54 mm width angular contact bearing
- ACD: Angular Contact design with a 25° contact angle
- P4A: High precision tolerance class exceeding ABEC 7 standards
- T: Phenolic (synthetic resin) cage material
- GA: Special preload designation for Extra light (Class A) preload
71917 ACD/P4ATGA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications. The universal matching (SU) capability allows three bearings to be mounted in any combination while maintaining consistent preload and performance.
Optimized Load Capacity: With a 25° contact angle design, the bearing efficiently handles combined radial and axial loads. The dynamic radial load rating of 21,060 lbf and static radial load rating of 30,825 lbf provide reliable performance under demanding conditions.
High-Speed Performance: The phenolic cage and optimized internal geometry contribute to a limiting speed of 28,000 rpm, making it suitable for high-speed spindle applications. The factory lubrication ensures immediate operational readiness.
Material Excellence: Constructed from chrome steel for both rings and balls, the bearing offers high durability and wear resistance, operating effectively within a temperature range of -30°C to 110°C.
71917 ACD/P4ATGA Bearing Typical Application Areas
The 71917 ACD/P4ATGA is ideally suited for high-precision, high-speed applications including:
- Machine tool spindles and high-speed machining centers
- Precision grinding spindles requiring minimal vibration
- High-frequency motor spindles in manufacturing equipment
- Medical device rotors and laboratory equipment
- Aerospace positioning systems demanding extreme accuracy
- Semiconductor manufacturing equipment requiring precise motion control
