S7008 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7008 CB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.2 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
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1667 lbf
Radial static load rating
1260 lbf
Limiting speed
34 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:
$ 257.11
/ each
In Stock
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S7008 CB/HCP4A Bearing Product Overview & Core Advantages
The S7008 CB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 15° contact angle and is supplied with a preload, delivering superior running accuracy and high rigidity. Its construction with ceramic balls and a phenolic cage enables outstanding high-speed performance, making it ideal for machine tool spindles and other precision machinery where reliability and precision are paramount.
S7008 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 15mm width). |
| CB | Specific internal clearance and preload designation for high-precision applications. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4 | Corresponds to ABEC-7, denoting an ultra-high precision tolerance class. |
S7008 CB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 15° contact angle and applied preload significantly increase system stiffness, minimizing deflection under load and ensuring exceptional running accuracy.
- Superior High-Speed Capability: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and friction, enabling a high limiting speed of 34,000 rpm.
- Extended Service Life & Reliability: Hybrid ceramic construction offers improved durability, reduced wear, and superior performance in lubricant-starved conditions compared to all-steel bearings.
- Optimized for Precision Applications: Manufactured to P4 (ABEC-7) tolerance, this bearing ensures minimal runout and vibration, which is critical for maintaining high positional accuracy.
S7008 CB/HCP4A Bearing Typical Application Areas
The S7008 CB/HCP4A is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors & Spindles: Where maximum rotational speed and low vibration are required.
- Medical & Dental Equipment: High-speed handpieces and diagnostic scanners.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical instrumentation.
