7048 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7048 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
14.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
240 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
360 mm
Outside diameter tolerance
-0.015mm to 0
Width
56 mm
Width tolerance
-0.3mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
22
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
73125 lbf
Radial static load rating
104625 lbf
Limiting speed
6.3 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:
$ 5791.88
/ each
In Stock
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7048 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7048 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a **25° contact angle** and is supplied with **preload**, enabling it to handle significant combined radial and axial loads simultaneously. Its construction with a **phenolic cage** and **ceramic balls** facilitates superior **high-speed performance**, while its **P4 (ABEC-7) tolerance class** guarantees ultra-precise operation, making it ideal for high-reliability, high-rigidity systems.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Indicates a **25° contact angle** and that the bearing is supplied with a **preload**. This optimizes bearing stiffness and minimizes axial and radial runout under load. |
| HCP4A | Signifies the use of **Hybrid Ceramic** balls (Silicon Nitride) and the **P4 (ABEC-7) tolerance class**. The 'A' denotes a specific internal design optimization. |
7048 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and applied preload provide high system rigidity, enabling the bearing to effectively support combined loads (radial and axial). With a dynamic load rating of 73,125 lbf and a static load rating of 104,625 lbf, it is built for demanding duty cycles.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density, hard ceramic balls reduces centrifugal forces and friction, allowing for a high limiting speed of 6,300 rpm. This hybrid ceramic design also reduces operating temperature and extends service life.
- Ultra-Precision Operation: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme positional accuracy and smooth operation.
- Wide Temperature Range & Lubrication: The bearing is pre-lubricated and operates effectively within a temperature range of -30°C to 110°C, suitable for various industrial environments.
7048 ACD/HCP4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles: Used in PCB drilling and precision machining.
- Precision Robotics: In robotic arm joints and gears requiring high positional accuracy.
- Aerospace & Defense Systems: In gyroscopes, radar systems, and other critical rotating assemblies.
- High-Performance Pumps and Compressors: Where reliability and high-speed operation are essential.
