7012 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7012 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.34 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
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8775 lbf
Radial static load rating
7538 lbf
Limiting speed
35 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7012 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 7012 ACDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and Universal Matchable (SU) designation, allowing for precise preload configuration in multi-bearing arrangements. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational mass, making it ideal for high-reliability, high-rigidity applications where precision is paramount.
7012 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing, designed for duplex pairs (Back-to-Back arrangement). |
| HC | Hybrid Ceramic construction, featuring ceramic balls for enhanced performance. |
| P4A | High precision tolerance class (exceeding ABEC 7 / ISO P4), ensuring minimal runout and superior rotational accuracy. |
7012 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and 25° contact angle provide excellent resistance to combined loads, offering high axial and radial stiffness for stable operation.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly increases the limiting speed (35,000 rpm) and reduces friction and heat generation.
- Precision Engineering: Manufactured to a P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, which is critical for applications with minimal deflection requirements.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be paired with other identical bearings in precisely controlled preload sets (Light Preload / Class B), simplifying installation and optimizing system performance.
7012 ACDGB/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where high RPM and low vibration are critical.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: Dental handpieces, centrifuges, and imaging scanner rotors.
