S7011 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7011 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.37 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3578 lbf
Radial static load rating
2610 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S7011 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S7011 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered with a 25° contact angle and manufactured to P4A super-precision tolerance, this bearing excels at handling combined radial and axial loads simultaneously. Its compact design, featuring a ceramic ball and phenolic cage, enables superior high-speed performance and thermal stability, making it an ideal solution for high-reliability spindle systems and precision machinery.
S7011 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Preloaded to Extra Light (Class A) for minimal deflection and high rigidity. |
| HC | Hybrid Ceramic: Features ceramic balls for reduced friction and higher speed capability. |
| P4A | Manufactured to ABEC 7 / P4A super-precision tolerance for exceptional running accuracy. |
S7011 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The extra light preload (Class A) ensures minimal axial and radial play, providing superior system stiffness and positional accuracy critical for machining and precision applications.
- Enhanced Speed & Thermal Performance: The combination of a lightweight phenolic resin cage and low-density silicon nitride (Si3N4) ceramic balls reduces centrifugal forces, lowers operating temperatures, and allows for a high limiting speed of 34,000 rpm.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads, making it suitable for complex loading conditions.
- Universal Matching & Sealed Design: Designated as Universal Matchable (SU), these bearings can be paired in any combination to form precisely matched sets (typically sets of 4) for duplex or multiplex arrangements. The sealed construction protects against contamination and retains the factory-applied grease lubrication.
S7011 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy rotary joints and arm actuators.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units.
