S7008 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7008 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.39 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
30 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
4950 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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S7008 CD/P4ADBA Bearing Product Overview & Core Advantages
The S7008 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This matched back-to-back (DB) arrangement provides superior stability under combined loads, simultaneously handling high radial forces and bidirectional axial thrust. Manufactured to P4A tolerance class, it ensures ultra-precise running accuracy and is pre-lubricated with grease for immediate use, making it ideal for high-speed, high-reliability spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 30mm width). |
| C | 15° contact angle, optimized for high-speed operation and moderate axial loads. |
| D | Duplex (two bearings supplied as a matched set). |
| P4A | High precision tolerance class, exceeding ABEC-7 standards for exceptional running accuracy. |
| DB | Back-to-Back arrangement, providing high moment rigidity. |
| A | Extra light preload, minimizing friction and heat generation for superior high-speed performance. |
S7008 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning under combined radial and axial loads.
- Optimized for High Speeds: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and smooth operation at the limiting speed of 41,000 rpm. The 15° contact angle further enhances high-speed capability.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees minimal runout and vibration for ultra-precise applications.
- Sealed & Pre-Lubricated: The sealed design protects against contamination, while the factory-applied grease lubrication ensures immediate operation and long service life within the specified temperature range (-30°C to 110°C).
S7008 CD/P4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery requiring maximum precision and speed.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- High-Speed Automation: Robotics, CNC rotary tables, and precision positioning systems.
- Medical & Dental Equipment: High-speed handpieces and laboratory instrumentation.
