7011 ACE/HCP4AH1DBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7011 ACE/HCP4AH1DBA
Basic Information
System of measurement
Metric
Weight
0.72 kg
Tolerance class
P4A
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
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7011 ACE/HCP4AH1DBA Bearing Product Overview & Core Advantages
The 7011 ACE/HCP4AH1DBA is a precision duplex angular contact ball bearing set designed for applications demanding exceptional rotational accuracy and rigidity. This metric series bearing is configured in a back-to-back (DB) arrangement, creating a highly stable system capable of supporting combined loads (radial and axial) from both directions. Its construction with ceramic balls and P4A super-precision tolerance makes it an ideal solution for high-speed and high-reliability machinery where minimal runout and thermal stability are critical.
7011 ACE/HCP4AH1DBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| ACE | 25° Contact Angle, Extra Light Preload | Optimized for high-speed operation with minimal friction and heat generation. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Enables higher speeds, reduced weight, and longer service life due to superior material properties. |
| P4A | Super Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for applications requiring supreme precision. |
| H1 | Stabilized for High-Temperature Operation | Ensures dimensional stability under thermal variations. |
| DB | Duplex Back-to-Back Arrangement | Provides high rigidity and can withstand overturning moments. |
| A | Light Preload / Class A | Pre-loaded at the factory to eliminate internal clearance, ensuring precise shaft positioning and stiffness. |
7011 ACE/HCP4AH1DBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration of the two bearings creates a wide, rigid support base. This structure is exceptionally effective at handling combined radial and axial loads from both directions, as well as resisting moment loads, making the assembly highly stable under complex loading conditions.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lighter and harder than steel) and a phenolic resin cage significantly reduces centrifugal forces and friction. This allows the bearing to achieve a high limiting speed of 34,000 rpm with lower operating temperatures and improved dynamic response.
- Precision & Accuracy: Manufactured to P4A super-precision tolerance and featuring an open seal design, this bearing guarantees minimal rotational vibration and runout. This is essential for applications where positioning accuracy and surface finish are paramount.
- Optimized for Demanding Environments: The standard lubrication and H1 thermal stabilization allow for reliable operation within a temperature range of -30°C to 110°C, ensuring consistent performance.
7011 ACE/HCP4AH1DBA Bearing Typical Application Areas
This high-performance bearing set is engineered for advanced machinery where speed, precision, and rigidity are non-negotiable. Key applications include:
- High-Frequency Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Robotic Arms and Joints
- High-Speed Centrifuges and Compressors
- Advanced Medical Equipment (e.g., dental handpieces, imaging scanners)
- Aerospace Actuation Systems and Instrumentation
