7008 ACE/HCP4BVG275
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7008 ACE/HCP4BVG275 Bearing Product Overview & Core Advantages
The 7008 ACE/HCP4BVG275 is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its ceramic ball material and P4 (ABEC-7) tolerance class, ensuring superior running accuracy and minimal vibration. Its 25° contact angle is optimized to handle significant axial loads in one direction while accommodating combined radial and axial loads. Preloaded and pre-lubricated, this bearing offers high rigidity, excellent high-speed capability up to 32,000 rpm, and reliable operation within a wide temperature range, making it an ideal choice for high-reliability, precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 15mm width). |
| ACE | Internal design code, typically indicating optimized internal geometry and 25° contact angle. |
| HCP4B | Hybrid Ceramic construction (Ceramic balls) with P4 precision tolerance and a Phenolic (B) cage. |
| VG275 | Lubrication specification, indicating the type and quantity of high-performance grease used. |
7008 ACE/HCP4BVG275 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This construction enables higher limiting speeds, provides electrical insulation, and extends service life, especially in high-speed and demanding environments.
- P4 Super-Precision Tolerance: Manufactured to ABEC-7 / P4 tolerance class, this bearing guarantees extreme dimensional and running accuracy. This results in superior system rigidity, reduced noise and vibration, and enhanced positional accuracy for the entire assembly.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's overall high-speed performance and reliability.
- Optimized Preload and Lubrication: The bearing is supplied with a preload and pre-lubricated with a specific grease (VG275), ensuring immediate operational readiness, consistent running torque, and long-term, maintenance-free performance within its specified temperature range.
7008 ACE/HCP4BVG275 Bearing Typical Application Areas
- High-Speed Machine Tool Spindles for milling, grinding, and drilling
- Precision Robotics and automated guidance systems
- High-Frequency Motors and spindle drives
- Medical and Dental Equipment such as high-speed handpieces and scanners
- Aerospace Instrumentation and auxiliary systems
