7212 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7212 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.69 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
22 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
12442 lbf
Radial static load rating
10125 lbf
Limiting speed
36 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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In Stock
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7212 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 7212 ACDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single bearing features a Universal Matchable (SU) design, allowing it to be supplied in sets of three for preloaded arrangements. Its core advantages include the ability to handle combined loads efficiently due to its 25° contact angle, superior high-speed performance enabled by a phenolic cage and ceramic balls, and outstanding operational reliability within a temperature range of -30°C to 110°C. This configuration is ideal for machine tool spindles and other high-precision machinery.
7212 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design, optimized for combined radial and axial loads. |
| DGB | Duplex arrangement, Back-to-Back (DB) mounting. This specific code indicates a universal matchable bearing designed for a back-to-back configuration in a set. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls for reduced weight, higher stiffness, and superior high-speed capability. |
| P4A | High precision tolerance class, providing extremely tight running accuracy for the most demanding applications. |
7212 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides excellent resistance to combined loads, offering high axial and radial stiffness. The bearing dimensions (60mm bore, 110mm OD) contribute to a robust load-carrying structure.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and allows for a high limiting speed of 36,000 rpm.
- Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The hybrid construction also offers improved resistance to wear and a longer service life under high-stress conditions.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be supplied in pre-matched sets (3 bearings) to create a preloaded arrangement, simplifying installation and ensuring optimal system performance.
7212 ACDGB/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Advanced Robotics and Automation Systems
