S7004 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7004 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.068 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 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
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1960 lbf
Radial static load rating
968 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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S7004 CDGA/P4A Bearing Product Overview & Core Advantages
The S7004 CDGA/P4A is a high-precision, double row angular contact ball bearing engineered for demanding applications. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads) with exceptional stability. Manufactured to the stringent P4A tolerance class, this bearing offers superior running accuracy and rotational precision. The combination of a phenolic cage, Extra light preload (Class A), and sealed construction makes it an ideal solution for high-speed spindles and other machinery requiring high rigidity and reliable, long-term performance.
S7004 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Bearing series and size designation (20mm bore, 42mm OD). |
| CDGA | Indicates a Universal Matchable (SU) bearing set. Two bearings are precision-matched as a set to provide optimal preload and performance when mounted together. |
| P4A | The tolerance class, denoting very high precision for both bore and outside diameter, ensuring minimal runout and superior performance. |
S7004 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design and 15° contact angle provide significantly increased radial and axial stiffness compared to single row bearings, enabling stable operation under combined loads.
- High-Speed Performance: The lightweight phenolic cage is engineered for high rotational speeds, reducing centrifugal forces and friction. This contributes to the bearing's high limiting speed of 100,000 rpm.
- Precision & Reliability: Manufactured to P4A super-precision tolerances and featuring an Extra light preload (Class A), this bearing delivers exceptionally smooth and accurate rotation, minimizing vibration and heat generation.
- Sealed & Lubricated for Life: The sealed construction effectively retains grease and excludes contaminants, making the bearing maintenance-free and suitable for the specified operating temperature range of -30°C to 110°C.
S7004 CDGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Advanced Robotics and Automation Equipment
