S7212 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7212 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.71 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
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7212 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7212 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a universal matchable bearing supplied in a set of two, it is designed to accommodate combined loads (radial and axial) simultaneously. Its construction with ceramic balls and a P4A super-precision tolerance class ensures low vibration, high rigidity, and superior high-speed capabilities. The sealed design with pre-lubrication offers reliable, long-term operation, making it ideal for high-reliability and high-rotational accuracy scenarios.
S7212 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7212 ACDGA/HCP4A is decoded as follows:
- S7: Series designation for high-precision angular contact ball bearings.
- 212: Standard size designation (Bore: 60 mm, OD: 110 mm, Width: 22 mm).
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a duplex (two-bearing) set.
- GA: Indicates a specific preload level (Extra light / Class A).
- /HC: Denotes the use of Hybrid Ceramic balls.
- P4A: Specifies the tolerance class, equivalent to ABEC 7, with enhanced running accuracy.
S7212 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex arrangement and 25° contact angle provide high rigidity and enable the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 32,500 rpm.
- Enhanced Precision and Longevity: The P4A tolerance class ensures minimal runout and smooth operation. Ceramic balls offer superior wear resistance and extended service life, especially in challenging environments.
- Maintenance-Free Operation: The bearing is sealed and pre-lubricated with grease, providing protection from contaminants and ensuring consistent performance across its specified temperature range (-30°C to 110°C).
S7212 ACDGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision, speed, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In high-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Used in electric motors and spindles for PCB drilling and semiconductor manufacturing.
- Aerospace and Defense Systems: In gyroscopes, navigation systems, and other critical rotating assemblies.
