S7211 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7211 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.52 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.008mm to 0
Width
21 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
9675 lbf
Limiting speed
17 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:
$ 158.87
/ each
In Stock
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S7211 CD/HCP4A Bearing Product Overview & Core Advantages
The S7211 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional speed, rigidity, and accuracy. As a single-row bearing, it is optimized to handle combined loads—primarily high radial loads and substantial thrust loads in one direction. Its core advantages stem from a 15° contact angle, a phenolic resin cage, and ceramic balls, enabling superior high-speed performance and reduced rotational mass. Pre-loaded and factory-lubricated, this bearing is designed for high reliability in precision machinery.
S7211 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7211 | Standard bearing series designation. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high-speed operation and high rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and allow for higher limiting speeds. |
| P4 | Denotes a high-precision tolerance class (ABEC-7 / ISO P4), ensuring extremely tight dimensional and running accuracy for critical applications. |
S7211 CD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 17,000 rpm.
- Enhanced Rigidity and Load Capacity: The 15° contact angle and optimized internal geometry provide high rigidity, supporting substantial radial dynamic load ratings (12,442 lbf) and one-direction thrust loads.
- Superior Precision and Stability: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-speed spindles.
- Reduced Maintenance: The bearing comes sealed and pre-lubricated, protecting against contamination and providing long-term, maintenance-free operation within its specified temperature range.
S7211 CD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where speed, precision, and reliability are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindles
- Medical and Dental Equipment Drives
- Aerospace Instrumentation and Auxiliary Systems
