S7008 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7008 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.19 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
15 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
3780 lbf
Radial static load rating
2475 lbf
Limiting speed
41 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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In Stock
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S7008 CDGA/P4A Bearing Product Overview & Core Advantages
The S7008 CDGA/P4A is a high-precision double row angular contact ball bearing engineered for applications demanding exceptional rigidity and running accuracy. This sealed bearing features an Extra Light (Class A) preload and a P4A super-precision tolerance class, making it ideal for high-speed spindles and other precision machinery. Its double row design enables it to support combined loads—significant radial loads alongside bidirectional axial loads—simultaneously, offering a compact and highly reliable solution.
S7008 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 15mm width). |
| CDGA | Indicates a universally matchable bearing designed in a duplex set configuration (2 bearings) with a 15° contact angle and specific internal preload. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7 standards, which ensures extremely tight dimensional and running accuracy for superior performance. |
S7008 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The double row angular contact design, combined with the Extra Light preload and P4A tolerance class, provides exceptional system stiffness and minimizes runout, which is critical for machining accuracy.
- Superior Load Capacity: Engineered to handle combined radial and axial loads from both directions efficiently, thanks to the optimized 15° contact angle and double row ball complement.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The standard grease lubrication is formulated for stable operation within this range.
- Sealed and Ready-to-Use: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is effectively maintenance-free throughout its service life in many applications.
S7008 CDGA/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (e.g., for CNC milling and grinding machines)
- High-Speed Precision Drives
- Industrial Pumps and Compressors
- Precision Instrumentation and Robotics
