7008 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7008 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
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
7.144 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1721 lbf
Limiting speed
56 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:
$ 214.32
/ each
In Stock
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7008 CE/HCP4A Bearing Product Overview & Core Advantages
The 7008 CE/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Featuring a P4 (ABEC-7) tolerance class and a 15° contact angle, it is optimized to handle combined loads (radial and axial) simultaneously. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance with a limiting speed of 56,000 rpm, while the available preload ensures maximum system stiffness and minimal runout for critical machinery.
7008 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Indicates the use of Ceramic (Silicon Nitride) balls, which reduce centrifugal forces, lower operating temperatures, and provide excellent performance at high speeds. |
| HC | Refers to a Phenolic (resin) Cage. This lightweight cage material is ideal for high-speed applications due to its excellent strength-to-weight ratio and compatibility with various lubricants. |
| P4A | Denotes a P4 (ABEC-7) precision class with specific accuracy enhancements. The "A" suffix often indicates a defined contact angle and optimized internal geometry for preload and high rigidity. |
7008 CE/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 15° contact angle and the option for preload delivers exceptional system stiffness and positional accuracy, making it ideal for machine tool spindles.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces and friction, enabling stable operation at the high limiting speed of 56,000 rpm.
- Enhanced Durability & Performance: Ceramic balls offer higher hardness, lower thermal expansion, and electrical insulation properties compared to steel, leading to longer service life and reliability in demanding conditions.
- Optimized for Combined Loads: The angular contact geometry is specifically designed to support significant radial dynamic load (2790 lbf) and axial loads in one direction simultaneously.
7008 CE/HCP4A Bearing Typical Application Areas
This bearing is specified for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and responsiveness.
- High-Frequency Motors & Spindles: Applications in aerospace, medical devices, and semiconductor manufacturing equipment.
- Turbochargers and High-Speed Pumps: Where extreme rotational velocities are encountered.
