S7008 FW/HC
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7008 FW/HC
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
18 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2722 lbf
Radial static load rating
1688 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 257.58
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S7008 FW/HC Bearing Product Overview & Core Advantages
The S7008 FW/HC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and speed capability. Engineered with a ceramic ball (Hybrid Ceramic) construction and P4 (ABEC-7) tolerance class, it delivers superior performance in high-speed and high-rigidity scenarios. Its single, preloaded arrangement ensures minimal axial and radial play, providing outstanding operational stability and precise shaft positioning. The phenolic cage and sealed design contribute to reliable, long-lasting operation.
S7008 FW/HC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| FW | Machined Brass Cage, Preloaded | Provides high strength and dimensional stability at high speeds, with preload eliminating internal clearance for enhanced rigidity. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduces centrifugal forces, lowers operating temperature, increases limiting speed, and provides longer service life. |
S7008 FW/HC Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls with a steel ring significantly reduces weight and inertia, enabling higher limiting speeds (31,000 rpm) and improved resistance to wear and heat generation compared to all-steel bearings.
- High Rigidity & Precision: The P4 tolerance class and factory-applied preload ensure minimal runout and deflection, resulting in exceptional rotational accuracy and system stiffness for precise machining and positioning.
- Optimized for High Speeds: The combination of the lightweight phenolic cage and hybrid ceramic construction minimizes friction and centrifugal forces, allowing the bearing to operate efficiently at its maximum limiting speed.
- Sealed & Lubricated for Life: The integrated seals retain lubrication and effectively exclude contaminants, making the bearing suitable for applications where re-lubrication is difficult, ensuring long-term, maintenance-free operation.
S7008 FW/HC Bearing Typical Application Areas
This high-speed precision bearing is ideally suited for applications requiring high rotational accuracy and velocity, including:
- High-Frequency Spindles for CNC machining centers and PCB drilling machines
- Precision Instrumentation and medical device motors
- High-Performance Electric Motors and turbochargers
- Advanced Robotics and automation equipment
