71907 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71907 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 71907 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing from a universally matchable (SU) set, it is engineered to accommodate combined loads, primarily thrust loads in one direction, with a 25° contact angle for optimal performance. Its core advantages stem from its P4A super-precision tolerance class, ceramic ball material (Silicon Nitride), and phenolic resin cage, enabling superior high-speed capabilities, reduced friction, and extended service life in critical machinery.
71907 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 AC | Basic bearing series with a 25° contact angle. |
| E | Optimized internal design for enhanced performance. |
| GA | Indicates a specific preload level (Extra light / Class A). |
| HCP4A | Defines the tolerance class P4A (higher than ABEC 7) and material/design features: H for Hybrid (Ceramic Balls), C for Phenolic Cage. |
71907 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls with a chrome steel ring significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation. This results in dramatically higher limiting speeds (56,000 rpm) and longer service life compared to all-steel bearings.
- Precision & Rigidity: Manufactured to a P4A super-precision tolerance with tight dimensional control on bore, outside diameter, and width. The 25° contact angle provides excellent rigidity for accurate rotational performance under combined loads.
- High-Speed Cage: The phenolic resin cage is lightweight, strong, and exhibits excellent sliding properties, which is crucial for maintaining stability and guiding the ceramic balls effectively at ultra-high speeds.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be universally paired with another bearing of the same type to form a pre-loaded duplex set (e.g., DB, DF, DT), offering design flexibility for precise axial rigidity requirements.
- Pre-lubrication: The bearing comes pre-lubricated for immediate operation, suitable for its specified temperature range of -30°C to 110°C.
71907 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed hybrid bearing is ideally suited for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Turbomachinery
- Aerospace & Defense Systems
- Semiconductor Manufacturing Equipment
