71907 ACEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71907 ACEGB/HCP4A Bearing Product Overview & Core Advantages
The 71907 ACEGB/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the ceramic ball material (Silicon Nitride) combined with a phenolic resin cage, enabling superior performance under demanding conditions. This bearing is designed to primarily accommodate high axial loads in one direction and radial loads simultaneously. With a P4A super-precision tolerance class and Universal Matchable (SU) designation, it is supplied as a pre-lubricated, light preload (Class B) set of two bearings, ready for installation in precision spindle arrangements requiring extreme rotational accuracy and minimal thermal expansion.
71907 ACEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71907 | Bearing series and size designation | Indicates a 35mm bore, 55mm OD, 10mm width bearing from the 719 series. |
| AC | 25° Contact Angle | Optimized for high axial load capacity and high-speed operation. |
| E | Optimized Internal Design | Enhanced internal geometry for increased load rating and speed capability. |
| GB | Light Preload (Class B) | Ensures bearing rigidity and precise shaft positioning with minimal friction increase. |
| HC | Hybrid Ceramic | Indicates the use of ceramic balls for reduced density, lower centrifugal force, and superior performance at high speeds. |
| P4A | Tolerance Class | Denotes super-precision tolerances for runout and dimensions, exceeding ABEC 7/ISO P4 standards. |
71907 ACEGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces weight and centrifugal forces, allowing for a higher limiting speed (56,000 rpm) and reduced operating temperatures compared to all-steel equivalents.
Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to smooth operation and high-speed capability.
Precision & Rigidity: The 25° contact angle and light preload (GB) provide high system rigidity and precise axial displacement control, which is critical for applications like machine tool spindles.
Universal Matchability (SU): The bearings are manufactured to universal matching standards, allowing any two bearings to be paired in a duplex set (e.g., DB, DF) without selective matching, simplifying inventory and assembly.
Optimized Load Capacity: The "E"-type internal design enhances the dynamic and static load ratings, enabling the bearing to handle significant combined loads.
71907 ACEGB/HCP4A Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and drilling where high speed, precision, and rigidity are paramount.
- Precision Robotics: Used in high-precision robotic arms and joints requiring minimal friction and high positional accuracy.
- High-Speed Motors and Spindles: Ideal for electric motors, turbine spindles, and other machinery operating at extreme rotational speeds.
- Aerospace & Defense Systems: Applied in gyroscopes, navigation systems, and other critical components where reliability and performance under stress are essential.
- Medical Equipment: Suitable for high-speed dental handpieces and surgical drill spindles.
