7012 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7012 CD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.68 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
95 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
14918 lbf
Radial static load rating
15638 lbf
Limiting speed
33 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
No drawings available at the moment, will be launched soon
In Stock
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7012 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7012 CD/HCP4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair configuration is engineered to handle combined loads, accommodating significant radial loads and bidirectional axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and high-speed capability, making it ideal for high-precision, high-reliability machinery. The use of ceramic balls and a phenolic cage further enhances its performance in high-velocity and thermally challenging environments.
7012 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series and size designation (60mm bore, 95mm OD). |
| C | 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates a duplex (two-bearing) set. |
| HC | Refers to the Hybrid Ceramic construction with ceramic balls and steel rings. |
| P4A | Denotes a super-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| A | Indicates an Extra Light preload for minimal friction and optimal high-speed performance. |
7012 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a large effective spread between load centers, significantly increasing the bearing set's resistance to moment loads and providing high rigidity. This configuration is exceptionally capable of supporting combined radial and axial loads from both directions.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage, a 15° contact angle, and hybrid ceramic construction (ceramic balls) reduces centrifugal forces, minimizes friction, and lowers operating temperatures. This enables a very high limiting speed of 33,000 rpm.
- Enhanced Durability and Thermal Stability: Ceramic balls are harder, lighter, and more resistant to wear and thermal deformation than steel balls. They also provide superior performance in potentially corrosive or electrically sensitive environments. The phenolic cage maintains its integrity at high speeds and temperatures.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications demanding the highest levels of precision and smooth operation.
7012 CD/HCP4ADBA Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Dental handpieces, centrifuges, and imaging devices.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
