7048 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7048 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
22
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
77625 lbf
Radial static load rating
110250 lbf
Limiting speed
7 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:
$ 5792.56
/ each
In Stock
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7048 CD/HCP4A Bearing Product Overview & Core Advantages
The 7048 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional speed performance. Its defining feature is the ability to support combined loads, simultaneously carrying significant radial loads and axial loads in one direction. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees superior running accuracy, making it ideal for high-reliability, high-speed machinery. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, reduced weight, and enhanced operational capabilities.
7048 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7048 CD/HCP4A provides detailed technical specifications:
- 7048: Basic bearing designation indicating a metric series angular contact bearing with a 240 mm bore, 360 mm outside diameter, and 56 mm width.
- C: Denotes a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- D: Indicates that the bearing is supplied with a specific preload for increased rigidity and precise shaft positioning.
- HC: Signifies the use of Hybrid Ceramic components, specifically ceramic balls with steel rings.
- P4: Identifies the tolerance class equivalent to ABEC-7, ensuring extremely tight dimensional and running accuracy.
- A: Specifies that the bearing is lubricated from the factory.
7048 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design, combined with a factory-set preload, provides superior system stiffness and minimizes axial and radial runout, which is critical for high-precision applications.
- Enhanced Speed and Temperature Performance: The hybrid ceramic construction (steel rings with ceramic balls) and a lightweight phenolic cage significantly reduce centrifugal forces, enabling a high limiting speed of 7,000 rpm. This design also allows for operation across a wide temperature range from -30°C to 110°C.
- Superior Load Capacity: Engineered with a 15° contact angle, this bearing efficiently handles combined loads, with high dynamic (77,625 lbf) and static (110,250 lbf) load ratings.
- Optimized for Performance: The open seal type allows for optimal lubrication flow and heat dissipation, which is essential for maintaining performance at high speeds.
7048 CD/HCP4A Bearing Typical Application Areas
This high-performance bearing is ideally suited for demanding applications in:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- High-Speed Motors and Spindles: Used in electric motors, CNC spindles, and other machinery where rotational accuracy and speed are critical.
- Aerospace and Defense Systems: Including gyroscopes, radar systems, and auxiliary power units.
- Precision Instrumentation: For medical devices, optical scanners, and testing equipment that demand minimal vibration and high running accuracy.
