7008 ACBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7008 ACBGA/HCP4A Bearing Product Overview & Core Advantages
The 7008 ACBGA/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Its design is optimized to handle significant combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and precision machinery. Manufactured to P4A tolerance class with a 25° contact angle and ceramic balls, this bearing delivers exceptional rotational accuracy, reduced friction, and extended service life. The extra light preload (Class A) ensures smooth operation with minimal deflection under load.
7008 ACBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series, indicating a 40mm bore, 68mm OD, and 15mm width. |
| AC | Angular Contact design, optimized for combined loads. |
| BGA | Designates a universally matchable bearing (SU designation), allowing precise pairing for preload control. |
| HC | Indicates the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7 standards for exceptional running accuracy. |
7008 ACBGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic (Si3N4) balls significantly reduces friction, heat generation, and wear. This enables higher limiting speeds (56,000 rpm) and provides electrical insulation, mitigating damage from electrical arcing.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable ball guidance at high speeds, contributing to smooth operation and reduced vibration.
- High-Precision P4A Tolerance: Manufactured to ultra-precise dimensional and running accuracy tolerances, this bearing minimizes runout and ensures consistent performance in demanding applications.
- Optimized Load Capacity: The 25° contact angle and precision grinding provide excellent capacity for combined radial and axial loads, offering high rigidity and positioning accuracy.
- Pre-Lubricated for Immediate Use: Comes pre-lubricated with a high-performance grease suitable for the specified temperature range (-30°C to 110°C), ensuring immediate installation and reliable initial operation.
7008 ACBGA/HCP4A Bearing Typical Application Areas
The 7008 ACBGA/HCP4A is ideally suited for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- High-Speed Machine Tool Spindles
- Precision Grinding Machines
- High-Frequency Electric Motors & Spindles
- Aerospace Actuation Systems
- Medical and Dental Equipment
- Semiconductor Manufacturing Equipment
