S7212 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7212 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.82 kg
Tolerance class
P4A
Seal type
Sealed
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
32.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S7212 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7212 ACDGA/P4A is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. As a single bearing from a universally matchable (SU) set, it is engineered to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery. The combination of a phenolic cage and premium grease lubrication enables outstanding high-speed performance and operational stability.
S7212 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7212 ACDGA/P4A is decoded as follows:
- S7: Series designation, indicating a specific high-performance design.
- 212: Standard dimension series; 12 indicates a 60mm bore.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a high ball count and optimized internal geometry for increased load capacity.
- GA: Indicates a specific internal clearance and preload level (Extra light / Class A).
- P4A: The tolerance class, denoting superior dimensional and running accuracy exceeding ABEC 7 standards.
S7212 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and a high ball count (16 balls) provides excellent rigidity, enabling the bearing to support substantial combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the optimized internal geometry contributes to a high limiting speed of 32,500 rpm, making it a true high-speed bearing.
- Precision and Longevity: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration. The sealed construction retains grease and excludes contaminants, ensuring consistent performance and a long service life in clean, high-speed environments.
- Universal Matchability: As part of a universally matchable (SU) set, two identical S7212 ACDGA/P4A bearings can be mounted together in a back-to-back or face-to-face arrangement to accommodate axial loads in both directions, offering exceptional design flexibility.
S7212 ACDGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, accuracy, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-precision automated equipment.
- High-Frequency Motors: Spindles for electric motors operating at very high rotational speeds.
- Medical and Dental Equipment: High-speed handpieces and scanners.
