S7005 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7005 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.079 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2151 lbf
Radial static load rating
1170 lbf
Limiting speed
83 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S7005 CDGB/P4A Bearing Product Overview & Core Advantages
The S7005 CDGB/P4A is a super-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed capability. As a single bearing with a 15° contact angle and Universal Matchable (SU) designation, it is designed to be paired with other bearings to form a preloaded duplex set, offering outstanding rigidity and running accuracy. Its core advantages include high-speed performance facilitated by a phenolic cage, the ability to handle combined radial and axial loads, and superior operational smoothness under light preload (Class B), making it ideal for high-precision spindles and other critical machinery.
S7005 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7005 | Basic bearing series, indicating a 25mm bore, 47mm OD, and 12mm width. |
| C | Specifies a 15° contact angle. |
| DGB | Indicates a Universal Matchable (SU) bearing, designed for universal pairing in any arrangement (DB, DF, DT). |
| P4A | Denotes a super-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
S7005 CDGB/P4A Bearing Structural Features & Performance Benefits
- High-Speed & Rigidity: The combination of a phenolic resin cage and a 15° contact angle provides excellent stability and low friction, enabling high limiting speeds (83,000 rpm) while maintaining system rigidity when mounted in a preloaded set.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high positional accuracy and superior surface finishes in machining operations.
- Universal Matching Capability (SU): As a Universal Matchable bearing, it offers maximum flexibility for mounting in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements without selective pairing, simplifying inventory and assembly.
- Optimized Load Capacity: The design is capable of supporting significant combined loads (dynamic: 2151 lbf, static: 1170 lbf), making it robust for demanding applications.
- Sealed & Pre-Lubricated: The sealed design with grease lubrication protects against contamination and provides long-term, maintenance-free operation within a specified temperature range.
S7005 CDGB/P4A Bearing Typical Application Areas
This super-precision angular contact ball bearing is predominantly used in high-performance applications where speed, accuracy, and rigidity are paramount. Key sectors include:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes.
- High-Speed Motors and Spindles: In PCB drilling, dental handpieces, and small precision tools.
- Precision Instrumentation: Including optical scanners and measuring devices.
- Robotics: Particularly in high-accuracy robotic arm joints and spindle units.
