S7212 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7212 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.71 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.008mm 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° to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
10125 lbf
Limiting speed
14 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 631.46
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S7212 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7212 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and one-directional axial loads simultaneously with high efficiency. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees exceptional running accuracy and rotational precision. The bearing is preloaded and comes lubricated and sealed from the factory, making it a ready-to-install, high-reliability component ideal for high-speed, high-rigidity systems.
S7212 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7212 | Basic bearing designation, indicating a 60mm bore, 110mm OD, and 22mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-precision, duplexed bearing set with preload. |
| HC | Indicates the use of Hybrid Ceramic balls (Ceramic balls with steel rings). |
| P4A | Specifies the P4 (ABEC-7) tolerance class and specific internal geometry for optimal performance. |
S7212 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This construction enables higher limiting speeds (14,000 rpm), provides electrical insulation, and extends service life, especially in high-speed or marginally lubricated conditions.
- Phenolic Cage: The lightweight and robust phenolic cage ensures excellent dimensional stability and low centrifugal forces at high rotational speeds, contributing to smooth operation and reduced vibration.
- High Rigidity & Load Capacity: The angular contact design and preload provide superior axial and radial stiffness, minimizing deflection under load. With a dynamic load rating of 12,442 lbf and a static load rating of 10,125 lbf, it reliably handles demanding combined loads.
- Precision & Reliability: Manufactured to P4 tolerance, this bearing ensures minimal runout and consistent performance, which is critical for applications requiring high positional accuracy.
- Sealed & Lubricated for Life: As a sealed bearing that is factory-lubricated, it is protected from contamination and is typically maintenance-free for its entire service life within its specified temperature range of -30°C to 110°C.
S7212 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where speed, accuracy, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles: Where low friction and high-speed capability are critical.
- Precision Robotics: In arm joints and rotary actuators requiring high rigidity and repeatability.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and auxiliary power units.
- Medical Equipment: For dental handpieces and high-speed laboratory centrifuges.
