7048 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7048 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
51.4 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
168 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
157950 lbf
Radial static load rating
315000 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7048 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7048 ACD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high rigidity, and the ability to handle significant combined loads. Its preloaded, matched arrangement ensures optimal performance and stability under complex loading conditions, making it ideal for high-precision, high-stiffness machinery.
7048 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7048 | Basic bearing designation indicating bore diameter (240 mm) and series. |
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class with specific running accuracy requirements. |
| TBT | Specifies the bearing is supplied as a Triplex Back-to-Back matched set of three bearings. |
| Light / Class B Preload | Denotes the preload level applied to the matched set for enhanced rigidity. |
7048 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision in demanding applications.
- High Load Capacity: With a dynamic load rating of 157,950 lbf and a static load rating of 315,000 lbf, this bearing is built to withstand substantial combined radial and axial loads.
- Optimized for Precision: Manufactured to P4A tolerance standards and featuring a phenolic cage, this bearing ensures smooth operation, low vibration, and is suitable for high-speed applications up to 7,500 rpm.
- Superior Material Construction: Made from chrome steel for both rings and balls, the bearing offers high durability and resistance to wear.
7048 ACD/P4ATBTB Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, rigidity, and reliability are paramount. Key applications include:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Precision Gearboxes
- Industrial Pumps and Compressors
- Printing and Paper Machinery
- Advanced Robotics and Automation Systems
