7008 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7008 ACD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4A
Seal type
Open
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
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5850 lbf
Radial static load rating
4680 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 235.68
/ each
In Stock
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7008 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7008 ACD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and is supplied as a universally matchable (SU) pair, enabling simplified mounting and optimal performance in preloaded arrangements. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed capabilities, low heat generation, and extended service life, making it ideal for high-rigidity, high-reliability systems.
7008 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for enhanced speed and durability. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| DGA | Universal Matchable (SU): Denotes the bearing is supplied as one of a universally matchable pair that can be mounted in any combination (face-to-face, back-to-back, or tandem) without pre-selection. |
7008 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The dual-bearing universal matchable (SU) set and 25° contact angle provide high system rigidity and excellent capacity for combined radial and axial loads.
- Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and friction, enabling a high limiting speed of 56,000 rpm.
- Extended Service Life & Reliability: Hybrid ceramic construction offers superior wear resistance and operates effectively within a broad temperature range from -30°C to 110°C. The open design allows for customized lubrication schemes to further optimize performance.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal running vibration and noise, which is critical for precision applications.
7008 ACD/HCP4ADGA Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Advanced Robotics and Automation Systems
