7012 ACE/HCP4AH1DGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7012 ACE/HCP4AH1DGA
Basic Information
System of measurement
Metric
Weight
0.78 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
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5850 lbf
Radial static load rating
5512 lbf
Limiting speed
33 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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7012 ACE/HCP4AH1DGA Bearing Product Overview & Core Advantages
The 7012 ACE/HCP4AH1DGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing is designed to accommodate combined loads (radial and axial) simultaneously, making it ideal for complex load scenarios. Its extra light preload (Class A) and P4A super-precision tolerance ensure smooth, quiet operation with minimal runout. The combination of a phenolic cage and ceramic balls enables superior high-speed performance and reduced rotational inertia, while the open design allows for custom lubrication schemes tailored to specific operational environments.
7012 ACE/HCP4AH1DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bearing series designation indicating bore diameter (60 mm), outside diameter (95 mm), and width (36 mm). |
| ACE | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced weight, higher stiffness, and superior high-speed capability. |
| P4A | Super-precision tolerance class exceeding ABEC 7 standards, ensuring extremely tight dimensional and running accuracy. |
| H1 | Stabilized heat treatment for consistent performance within a specified temperature range. |
| DG | Universal Matchable (SU) designation. Two bearings can be paired in a universal arrangement to handle bidirectional axial loads. |
| A | Extra light preload class, minimizing friction and heat generation for high-speed applications. |
7012 ACE/HCP4AH1DGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces rolling element density, lowering centrifugal forces and enabling a limiting speed of 33,000 rpm. This results in less friction, lower operating temperatures, and extended service life.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to smooth operation and high acceleration capabilities at extreme speeds.
- Precision Ground Geometry: Manufactured to P4A tolerance with tight bore and outside diameter tolerances, this bearing provides exceptional running accuracy, reduced vibration, and superior system rigidity.
- Universal Matchability (SU): As a universal matchable bearing, two 7012 ACE/HCP4AH1DGA units can be mounted together in a back-to-back or face-to-face arrangement. This configuration creates a pre-stressed system capable of supporting combined radial and bidirectional axial loads with high rigidity.
- Open Seal Design: The open structure allows for custom lubrication, facilitating the use of specialized oils or greases to optimize performance for specific temperature ranges (-30°C to 110°C) and operational conditions.
7012 ACE/HCP4AH1DGA Bearing Typical Application Areas
This high-performance bearing is specifically designed for advanced machinery and systems where precision, speed, and reliability are paramount. Key application areas include:
- High-Speed Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads requiring high rotational accuracy and rigidity.
- Precision Robotics: In robot arm joints and rotary actuators demanding low friction and high responsiveness.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and auxiliary power units (APUs) where reliability under extreme conditions is critical.
- High-Frequency Motors and Spindles: For PCB drilling, dental handpieces, and small turbine applications that operate at very high RPMs.
