7048 CD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7048 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
34.2 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
240 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
360 mm
Outside diameter tolerance
-0.004mm to 0
Width
112 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
125775 lbf
Radial static load rating
220500 lbf
Limiting speed
7.5 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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 5533.19
/ each
In Stock
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7048 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7048 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. As a universal matchable (SU) bearing supplied in a pre-set duplex pair, it is engineered to accommodate combined loads—significant radial and axial loads in both directions—simultaneously. Its P4A tolerance class and extra light preload (Class A) ensure exceptional running accuracy, low noise, and minimal heat generation, making it ideal for high-speed and high-rigidity spindle arrangements.
7048 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7048 CD/P4ADGA provides a detailed technical specification:
- 7048: Basic series designation, indicating a metric bore diameter of 240 mm, outside diameter of 360 mm, and width of 112 mm.
- C: Denotes a 15° contact angle, optimized for high-speed applications requiring high axial rigidity.
- D: Indicates the bearing is part of a universally matchable (SU) duplex set. Two bearings can be paired in any combination (DB, DF, DT) to achieve the required rigidity and load configuration.
- P4A: Specifies an ultra-precision tolerance class exceeding ABEC 7/ISO P4, with enhanced running accuracy for spindle applications.
- DGA: Indicates the specific preload grade within the pair. Extra light preload (Class A) minimizes friction and heat build-up, enabling higher limiting speeds.
7048 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair design and 15° contact angle create an exceptionally rigid system capable of handling heavy combined loads. The high dynamic and static load ratings (125,775 lbf and 220,500 lbf respectively) ensure long service life under demanding conditions.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a phenolic resin cage, this bearing achieves smooth operation and a high limiting speed of 7,500 rpm. The cage is lightweight and robust, ideal for rapid acceleration and deceleration.
- Universal Matchability (SU): This feature provides unparalleled flexibility in mounting. The two bearings in the set can be arranged in tandem (DT), back-to-back (DB), or face-to-face (DF) configurations to optimize performance for specific load and stiffness requirements.
- Superior Material & Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and durability. The open seal type allows for optimal lubrication management in controlled environments.
7048 CD/P4ADGA Bearing Typical Application Areas
This precision angular contact bearing is critical in high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinding equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Robotics: High-accuracy joints and rotary actuators.
