71917 ACE/P4A
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 ACE/P4A Bearing Product Overview & Core Advantages
The 71917 ACE/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and exceptional rotational accuracy. Manufactured to P4 (ABEC-7) tolerance class, this bearing is engineered to handle significant axial loads in one direction combined with moderate radial loads. Its compact 18mm width and optimized internal geometry make it an ideal choice for high-speed spindles and other precision machinery where space constraints and performance are critical. The phenolic cage and pre-lubrication contribute to its reliable operation at the specified limiting speed.
Model Code Breakdown
- 71917: Basic series designation for a high-precision, angular contact ball bearing.
- ACE: A specific internal design code from the manufacturer, often indicating optimized internal geometry and contact angle for performance.
- P4A: Denotes the tolerance class P4 (ABEC-7) and a specific grouping within that class for precision matching.
71917 ACE/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The 25° contact angle and strict P4 tolerance class ensure minimal runout and high system rigidity, which is crucial for machining accuracy and reduced vibration.
Optimized Load Capacity: With a dynamic load rating of 6322 lbf and a static load rating of 4860 lbf, this bearing is capable of handling the combination loads encountered in demanding applications.
Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the pre-lubrication and optimized internal design enable a high limiting speed of 21,000 rpm.
Precision Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance within its operating temperature range of -30°C to 110°C.
71917 ACE/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles (e.g., CNC milling, grinding, and high-speed machining centers)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Robotic Arm Joints and Precision Drives
