7008 CDGA/P4AGMM
7000 Series Super Precision Angular Contact Ball Bearings
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7008 CDGA/P4AGMM Bearing Product Overview & Core Advantages
The 7008 CDGA/P4AGMM is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 15° contact angle and an Extra Light (Class A) preload, making it ideal for high-speed spindles and precision machinery. Its P4A tolerance class ensures superior dimensional and running accuracy, while the phenolic cage and universal matching capability (Universal Matchable (SU)) provide reliable performance in complex arrangements.
7008 CDGA/P4AGMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing designation (40mm bore, 68mm OD, 15mm width) |
| CDGA | Contact angle (15°) and preload designation (Extra Light/Class A) |
| P4A | High precision tolerance class (superior to ABEC 7) |
| GMM | Grease lubrication and universal matching specification |
7008 CDGA/P4AGMM Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage enables stable operation at limiting speeds up to 43,000 rpm, reducing centrifugal forces and maintaining dimensional stability under high rotational stresses.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-precision applications.
Optimized Load Capacity: The 15° contact angle and chrome steel construction provide excellent radial dynamic load rating of 3780 lbf and static load rating of 2475 lbf, effectively handling combined loads in demanding conditions.
Universal Matching Design: As part of a matched set of 3 bearings, the SU designation ensures precise preload and alignment when used in multi-bearing arrangements, enhancing system rigidity and accuracy.
7008 CDGA/P4AGMM Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and grinding spindles
- Precision Medical Equipment: Dental handpieces and surgical tools
- Aerospace Components: Gyroscopes and navigation system assemblies
- Robotics and Automation: High-precision robotic joints and positioning systems
- Semiconductor Manufacturing: Wafer handling equipment and precision stages
