7212 ACD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7212 ACD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
1.39 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
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19890 lbf
Radial static load rating
20250 lbf
Limiting speed
31 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
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7212 ACD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7212 ACD/HCP4ADBA is a duplex back-to-back (DB) angular contact ball bearing designed for applications demanding the highest levels of precision and rigidity. This precision bearing is engineered to simultaneously handle significant combined loads—high radial loads and bidirectional axial loads. Its ceramic ball construction and P4A super-precision tolerance class make it an ideal solution for high-speed spindles and other machinery where exceptional running accuracy, thermal stability, and high rigidity are critical. The matched DB arrangement provides a preloaded setup for maximum system stiffness right from installation.
Model Code In-Depth Explanation
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing series, 60 mm bore, 110 mm OD, 44 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two single bearings supplied as a set). |
| HC | Hybrid Ceramic: Ceramic balls with steel rings. |
| P4A | Super Precision tolerance class (equivalent to ABEC 7). |
| DB | Back-to-Back mounting arrangement. |
| A | Extra Light Preload. |
7212 ACD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and provides exceptional stability. This configuration allows the bearing to handle significant combined radial and axial loads from both directions.
- Superior High-Speed Performance: The use of a lightweight phenolic resin cage and low-density ceramic (Si3N4) balls reduces centrifugal forces, lowers operating temperatures, and enables a high limiting speed of 31,000 rpm. This makes it an excellent high-speed bearing.
- Enhanced Durability & Longevity: Hybrid ceramic construction offers superior wear resistance, reduced thermal expansion, and extended service life, especially in demanding applications. The bearings are supplied lubricated and ready for operation.
- Precision Engineering: Manufactured to P4A super-precision standards with tight dimensional tolerances on the bore diameter, outside diameter, and width, ensuring smooth, quiet, and vibration-free operation.
7212 ACD/HCP4ADBA Bearing Typical Application Areas
This precision duplex bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Robotics: Arm joints and rotary units requiring high rigidity and accuracy.
- High-Frequency Motors & Spindles: Applications where low inertia and high rotational accuracy are paramount.
- Medical Equipment: High-speed drill and tool spindles.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
