S7011 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7011 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7011 CDGA/HCP4A is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. As a single bearing with a 15° contact angle and universal matchable (SU) design, it is optimized to handle combined loads—significant radial and one-directional axial loads—simultaneously. Its defining features include a P4A tolerance class for exceptional running accuracy, a phenolic resin cage for high-speed capability, and ceramic balls that reduce centrifugal forces, lower operating temperatures, and extend service life. This combination makes it an ideal solution for spindles requiring high rigidity, ultra-high speeds, and uncompromising reliability.
Model Code Breakdown
- S70: Series designation for high-precision angular contact ball bearings.
- 11: Bore diameter code (55 mm).
- C: 15° contact angle.
- D: Signifies a phenolic resin cage.
- GA: Indicates the bearing is universally matchable (SU) and preloaded to Extra Light (Class A).
- /HCP4A: Denotes the tolerance class P4A, representing extremely tight dimensional and running accuracy tolerances superior to standard ABEC 7 / ISO P4.
S7011 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Low Heat Generation: The lightweight phenolic resin cage (D) and ceramic (silicon nitride) balls work in tandem to minimize centrifugal forces and friction, enabling a limiting speed of 46,000 rpm and stable operation under extreme conditions.
- Exceptional Rigidity and Running Accuracy: The P4A tolerance class ensures minimal runout and vibration, which is critical for maintaining precision in machining and positioning. The extra light preload (GA) enhances system stiffness without generating excessive heat.
- Superior Load Capacity: With a dynamic load rating of 8932 lbf and a static load rating of 7312 lbf, the bearing is robustly designed to handle the combined loads encountered in high-speed spindles.
- Sealed & Pre-Lubricated: The bearing is sealed and pre-lubricated with grease, protecting against contamination and providing maintenance-free operation within its specified temperature range of -30°C to 110°C.
S7011 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for aerospace and automotive manufacturing.
- Other Precision Machinery: Applications demanding the ultimate in speed, accuracy, and rigidity.
