71907 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71907 ACB/P4A Bearing Product Overview & Core Advantages
The 71907 ACB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior performance. Engineered to a P4 (ABEC-7) tolerance class, it is ideal for high-speed operations, supporting significant axial loads in one direction. Its compact design, featuring a 35 mm bore and 10 mm width, makes it suitable for space-constrained, high-reliability applications. The bearing is pre-lubricated and features a phenolic cage, contributing to its excellent high-speed capabilities and operational stability.
71907 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71907 ACB/P4A provides detailed technical specifications:
- 71907: Denotes the bearing series and size (35mm bore, 55mm OD, 10mm width).
- ACB: Stands for Angular Contact Bearing, indicating its design to handle combined loads with a 25° contact angle.
- P4A: Specifies the tolerance class P4 (ABEC-7), ensuring extremely high running accuracy. The 'A' suffix indicates a specific internal design and preload level for optimal rigidity and performance.
Key features highlighted by the code include its open seal type for maximum speed and the availability of preload for enhanced system rigidity.
71907 ACB/P4A Bearing Structural Features & Performance Benefits
The design of the 71907 ACB/P4A delivers distinct performance advantages:
- High Precision and Rigidity: Manufactured to a P4 tolerance class, it ensures minimal runout and vibration. The availability of preload eliminates internal clearance, resulting in superior shaft positioning accuracy and system stiffness.
- Optimized Load Capacity: With a 25° contact angle, this bearing is engineered to support high axial loads in one direction while also handling radial loads effectively.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 48,000 rpm. The open design minimizes friction and heat generation.
- Durable Construction: Components made from chrome steel provide high hardness and wear resistance, ensuring a long service life under demanding conditions.
71907 ACB/P4A Bearing Typical Application Areas
The 71907 ACB/P4A is ideally suited for high-precision, high-speed machinery across various industries, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: Especially in applications where low friction and high rotational speeds are critical.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small precision motors.
- Robotics and Automation: In joints and arm assemblies where compact size, high speed, and precise movement are essential.
