S7205 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7205 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
52 mm
Outside diameter tolerance
-0.007mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
1620 lbf
Limiting speed
30 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:
$ 167.11
/ each
In Stock
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S7205 CD/P4A Bearing Product Overview & Core Advantages
The S7205 CD/P4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the 15° contact angle and P4 (ABEC-7) super-precision tolerance class, enabling it to handle significant combined loads—both radial and axial—simultaneously. Pre-loaded and factory-lubricated, this bearing offers exceptional running accuracy and rigidity, making it an ideal, ready-to-install solution for demanding machinery requiring minimal rotational error and long-term reliability.
S7205 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact bearings. |
| 205 | Standard bore (25 mm) and outside diameter (52 mm) designation. |
| CD | Specifies a 15° contact angle and a specific internal design optimized for high rigidity. |
| P4 | Denotes the P4 tolerance class (equivalent to ABEC-7), ensuring ultra-precise dimensions and runout for superior performance. |
| A | Indicates that the bearing is supplied with a preload for immediate high-stiffness operation. |
S7205 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Running Accuracy: The single-row design with a 15° contact angle and P4 precision provides excellent shaft positioning accuracy and system stiffness, critical for minimizing deflection under load.
- Superior Load Capacity: Engineered to support combined radial and axial loads efficiently. The dynamic load rating of 3038 lbf and static load rating of 1620 lbf ensure reliable performance in demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 30,000 rpm. This makes it suitable for very high-speed spindles and rotors.
- Sealed and Lubricated for Life: As a sealed and pre-lubricated unit, it is protected from contamination and is designed for maintenance-free operation within its specified temperature range of -30°C to 110°C.
S7205 CD/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arms, high-accuracy joints)
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (High-speed handpieces, scanners)
- Aerospace Instrumentation (Gyroscopes, navigation systems)
