7008 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7008 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 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
15 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2632 lbf
Radial static load rating
1620 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
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
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 131.84
/ each
In Stock
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7008 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 7008 ACEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and speed capability. This single bearing features a 25° contact angle and an Extra Light (A) preload, making it ideal for systems where minimal deflection and high rigidity are critical under combined loads. Its ceramic ball construction and P4A tolerance class ensure superior performance in high-speed and thermally stable environments. The bearing is universally matchable (SU), allowing for precise axial play adjustment when paired with a second bearing.
7008 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series, indicating a 40mm bore, 68mm OD, and 15mm width. |
| AC | Angular Contact design, optimized for combined radial and axial loads. |
| EGA | Designates Extra Light (A) preload and specific internal geometry for high precision. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced friction and higher speed capability. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for running accuracy. |
7008 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (41,000 rpm) and extended service life compared to all-steel bearings.
- Precision & Rigidity: Manufactured to P4A tolerance class with an Extra Light preload, this bearing provides exceptional running accuracy and system stiffness, minimizing deflection under combined loads.
- High-Speed Phenolic Cage: The phenolic resin cage is lightweight and robust, offering excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's overall high-speed performance.
- Universal Matchability (SU): As a universally matchable bearing, it can be paired with another bearing to create a pre-loaded set, simplifying installation and ensuring optimal performance in duplex arrangements.
7008 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications 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 and Spindles: Applications demanding low heat generation and maximum rotational velocity.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical instrumentation.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
