71909 ACDGA/VQ253
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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71909 ACDGA/VQ253 Bearing Product Overview & Core Advantages
The 71909 ACDGA is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered with a 25° contact angle and manufactured to P4A tolerance class, this bearing excels in handling combined radial and axial loads simultaneously. Its extra light preload (Class A) ensures minimal friction and smooth operation, making it ideal for high-speed applications with a limiting speed of 41,000 rpm. The phenolic cage and universal matching capability further enhance its performance in precision assemblies.
71909 ACDGA/VQ253 Bearing Model Code Explained, Specifications & Naming Convention
| 71909 | Basic designation: 45 mm bore, 68 mm OD, 12 mm width |
| AC | Angular Contact design with 25° contact angle |
| D | High precision manufacturing standards |
| GA | Universal Matchable bearing, supplied in sets of 3 for preloaded arrangements |
71909 ACDGA/VQ253 Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and running precision.
High-Speed Capability: The phenolic cage and optimized internal design enable stable operation at limiting speeds up to 41,000 rpm, making it suitable for demanding high-speed applications.
Superior Load Capacity: With a radial dynamic load rating of 2790 lbf and static load rating of 2025 lbf, the bearing delivers reliable performance under combined loading conditions.
Universal Matching Design: As part of a Universal Matchable (SU) set supplied in groups of three, these bearings can be arranged in back-to-back or face-to-face configurations to achieve optimal preload and stiffness.
Material Excellence: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and durability in precision applications.
71909 ACDGA/VQ253 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional accuracy
- Precision Instrumentation: Measuring equipment and laboratory instruments demanding minimal runout
- High-Speed Motors: Spindle motors and high-frequency applications where speed and precision are critical
- Aerospace Components: Guidance systems and avionics requiring reliable performance in demanding conditions
- Medical Equipment: Dental handpieces and surgical tools where precision and reliability are paramount
