S7028 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7028 CD/P4A
Basic Information
System of measurement
Metric
Weight
3.44 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
210 mm
Outside diameter tolerance
-0.011mm to 0
Width
33 mm
Width tolerance
-0.24mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
22
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
34425 lbf
Radial static load rating
37350 lbf
Limiting speed
6.7 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2272.22
/ each
In Stock
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S7028 CD/P4A Bearing Product Overview & Core Advantages
The S7028 CD/P4A is a precision single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. Characterized by its P4 (ABEC-7) tolerance class and a 15° contact angle, this bearing is designed to support high combined loads, accommodating significant radial loads and axial loads in one direction simultaneously. Its compact design, featuring a phenolic cage and preloaded configuration, ensures high rigidity and stable operation, making it an ideal choice for high-reliability, high-precision machinery.
S7028 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| C | 15° Contact Angle | Optimized for handling combined radial and axial loads. |
| D | Enhanced Internal Design | Increased load capacity and optimized internal geometry. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees ultra-precision running accuracy and minimal vibration for high-speed applications. |
| Sealed | Integrated Seals | Protects against contamination and retains lubricant, enhancing service life. |
S7028 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Stability: The phenolic resin cage offers excellent dimensional stability and low friction, contributing to smooth operation and high-speed capability with a limiting speed of 6,700 rpm. The availability of preload further increases system rigidity and minimizes axial and radial runout.
- Superior Load Capacity: With a radial dynamic load rating of 34,425 lbf and a static load rating of 37,350 lbf, this bearing is built to handle demanding combined load conditions reliably.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional tolerances on the 140 mm bore and 210 mm outside diameter, ensuring precise fit and superior running accuracy.
- Ready-to-Use & Long-Lasting: The bearing comes lubricated and sealed, making it a maintenance-free solution for the specified operating temperature range of -30°C to 110°C.
S7028 CD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace and Defense Actuation Systems
