S7210 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7210 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.39 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.008mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
7312 lbf
Limiting speed
16 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:
$ 454.67
/ each
In Stock
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S7210 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7210 ACD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional high-speed performance and rigidity. Engineered with a 25° contact angle and a phenolic resin cage, it excels at handling combined loads (radial and axial) simultaneously. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-reliability, precision machinery where minimal runout and vibration are critical.
S7210 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex (arranged for preload) | Optimized for high rigidity and precise axial positioning. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) | Enables higher limiting speeds, reduced friction, and longer service life. |
| P4A | Precision Tolerance Class P4 (ABEC-7) | Guarantees exceptional dimensional and running accuracy for precision applications. |
S7210 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of ceramic balls and chrome steel rings significantly reduces centrifugal forces, lowers operating temperature, and allows for a limiting speed of 16,000 rpm. This construction also offers superior resistance to electrical erosion.
- Optimized Preload & High Rigidity: The bearing is supplied as a preloaded single unit (ACD), providing high system stiffness, minimizing axial and radial deflection under load, and ensuring precise rotational accuracy.
- Superior Load Capacity: With a 25° contact angle and robust design, it efficiently handles significant combined radial and axial loads (Dynamic: 9518 lbf, Static: 7312 lbf).
- Phenolic Resin Cage: This lightweight and robust cage material contributes to smooth operation at high speeds, excellent dimensional stability, and is suitable for the specified temperature range (-30° to 110 °C).
S7210 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Actuation Systems
