7011 ACE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7011 ACE/HCPA9ADGA
Basic Information
System of measurement
Metric
Weight
0.72 kg
Tolerance class
PA9A
Seal type
Open
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
36 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
5850 lbf
Radial static load rating
5220 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7011 ACE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 7011 ACE/HCPA9ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a universal matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to achieve specific stiffness and load-handling characteristics. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, superior high-speed capability enabled by its phenolic cage and ceramic balls, and outstanding operational reliability due to its PA9A tolerance class and pre-lubrication.
7011 ACE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7011 ACE/HCPA9ADGA decodes the bearing's technical specifications as follows:
- 7011: Standard bore diameter (55 mm) and series designation.
- A: Signifies a 25° contact angle, optimized for carrying higher axial loads.
- C: Indicates the use of Ceramic (Si3N4) balls, which reduce centrifugal forces, lower operating temperature, and enable higher speeds.
- E: Designates an Extra light preload (Class A), ensuring minimal starting torque and smooth operation at very high speeds.
- /HCPA9A: Denotes the tolerance class PA9A, indicating ultra-precision dimensions and running accuracy.
- DGA: Specifies that the bearing is Lubricated with a specific grease suitable for the designated temperature range.
7011 ACE/HCPA9ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and universal matchable feature allow the bearing to be pre-stressed in pairs, creating a highly rigid system capable of supporting significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density than steel) and a lightweight phenolic cage significantly reduces centrifugal forces and inertial drag, enabling a high limiting speed of 34,000 rpm.
- Precision Operation: Manufactured to PA9A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, resulting in minimal vibration and exceptional positional precision for spindle applications.
- Reduced Maintenance: The bearing is supplied pre-lubricated, ensuring immediate readiness for service and long-term, reliable operation within its specified temperature range.
7011 ACE/HCPA9ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
