7048 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7048 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7048 ACD/P4ADBA is a precision duplex angular contact ball bearing configured in a Back-to-Back (DB) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high rigidity, and reliable performance under combined loads. Its duplex DB setup provides excellent moment load capacity and shaft stability, making it an ideal choice for high-precision, high-stiffness machinery.
7048 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 7048: Basic bearing series, denoting a 240mm bore and 360mm outside diameter.
- A: Signifies a 25° contact angle, optimized for carrying significant axial loads.
- C: Indicates a duplex bearing (a pre-matched set).
- D: Specifies the Back-to-Back (DB) mounting arrangement.
- P4A: Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration.
- DB: Confirms the Back-to-Back pre-mounting of the two bearings.
- A: Indicates an Extra Light preload for minimal friction and optimal high-speed operation.
7048 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex Back-to-Back (DB) design creates a wide, rigid support system that effectively resists moment loads and prevents shaft misalignment, ensuring precise positioning.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 118,575 lbf, this bearing is engineered to handle substantial combined radial and axial loads simultaneously.
Precision & High-Speed Performance: Manufactured to P4A precision tolerances and featuring a lightweight phenolic resin cage, the bearing achieves a high limiting speed of 7,500 rpm with low friction and temperature rise.
Optimized for Performance: The open seal type allows for custom lubrication schemes to match specific operational needs, while the chrome steel construction ensures durability and long service life.
7048 ACD/P4ADBA Bearing Typical Application Areas
The 7048 ACD/P4ADBA is ideally suited for high-performance machinery where precision, rigidity, and speed are critical. Key applications include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Machining Centers
- Precision Gearboxes
- Industrial Pumps and Compressors
- Aerospace Positioning Systems
