7038 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7038 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7038 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This precision bearing is distinguished by its ceramic ball material and P4 (ABEC-7) tolerance class, ensuring superior running accuracy and minimal vibration. Its design is optimized to support high combined loads, primarily thrust loads in one direction, while accommodating significant radial loads. The combination of a phenolic cage and pre-applied lubrication enables outstanding high-speed performance, making it an ideal choice for machine tool spindles and other high-velocity machinery where high rigidity and reliability are paramount.
Model Code Breakdown
| Model Segment | Technical Meaning |
|---|---|
| 7038 | Standard bore diameter (190 mm), outside diameter (290 mm), and width (46 mm) dimensions. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high load capacity internal design. |
| HC | Hybrid Ceramic: Indicates the use of ceramic balls. |
| P4 | Specifies a P4 tolerance class (equivalent to ABEC-7), denoting very high precision. |
7038 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces friction, heat generation, and wear. This construction offers electrical insulation, lower density for reduced centrifugal forces, and extended service life, especially at very high speeds.
- High-Precision P4 Tolerance: Manufactured to a P4 tolerance class, this bearing guarantees minimal runout and exceptional dimensional stability, which is critical for applications requiring extreme rotational accuracy.
- Optimized Cage and Lubrication: The phenolic cage is lightweight and robust, contributing to smooth operation at the bearing's high limiting speed. The bearing is pre-lubricated to ensure immediate and reliable performance from startup.
- Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing provides excellent capacity for combined loads, offering high rigidity and stability under demanding operational conditions.
7038 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace Equipment: Gyroscopes, navigation systems, and auxiliary power units.
- High-Speed Motors and Pumps: Where low friction, high speed, and long life are required.
