7048 CD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7048 CD/P4A Bearing Product Overview & Core Advantages
The 7048 CD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this single-row bearing features a 15° contact angle and is supplied with a preload for enhanced system stiffness and precise shaft positioning. Manufactured to P4 (ABEC-7) tolerance class, it is an ideal solution for high-speed, high-reliability machinery where uncompromising performance is critical.
Model Code Breakdown
- 7048: Basic designation indicating a metric series bearing with a 240 mm bore and 360 mm outside diameter.
- CD: Indicates a specific contact angle of 15° and a preload classification, optimizing it for high rigidity and precise operation.
- P4A: Denotes an ultra-precision tolerance class equivalent to ABEC-7, ensuring minimal runout and superior dimensional accuracy.
- Open: The bearing is supplied without seals or shields, allowing for custom lubrication schemes and maximum speed capability.
7048 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The angular contact design and factory-applied preload eliminate internal clearance, providing superior shaft support and minimizing deflection under load. The P4 tolerance guarantees exceptional running accuracy.
Optimized Load Capacity: With a dynamic load rating of 77,625 lbf and a static load rating of 110,250 lbf, this bearing is built to withstand significant combined loads.
High-Speed Capability: The lightweight phenolic resin cage and open design contribute to a high limiting speed of 5,600 rpm, reducing centrifugal forces and friction.
Premium Materials: Constructed from chrome steel for rings and balls, the bearing offers high hardness, wear resistance, and long service life. It is supplied lubricated and operates within a temperature range of -30°C to 110°C.
7048 CD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Positioning Systems
- Medical and Laboratory Equipment
