7005 ACD/P4ADBD
7000 Series Super Precision Angular Contact Ball Bearings
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7005 ACD/P4ADBD Bearing Product Overview & Core Advantages
The 7005 ACD/P4ADBD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) matched set features a Heavy preload (Class D) and a P4A super-precision tolerance, making it ideal for machine tool spindles and other high-performance machinery. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously with high stability, ensuring superior rotational accuracy and system rigidity in compact installations.
7005 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
- 7005: Basic designation indicating a 25 mm bore and 47 mm outside diameter.
- AC: Angular Contact design with a 25° contact angle.
- D: Indicates a Duplex (two bearings in a set) configuration.
- P4A: Denotes a super-precision tolerance class, exceeding standard P4 levels for enhanced running accuracy.
- DB: Specifies the Back-to-Back mounting arrangement of the duplex set.
7005 ACD/P4ADBD Bearing Structural Features & Performance Benefits
The bearing's performance is defined by its specific construction. The duplex back-to-back arrangement creates a wide effective spread, significantly increasing moment rigidity and resistance to overturning moments. The Heavy preload (Class D) eliminates internal clearance, providing maximum stiffness and precise shaft positioning, which is critical for high-precision machining. The phenolic cage offers excellent performance at high speeds, contributing to the bearing's capability to operate at a limiting speed of 85,000 rpm. Manufactured from chrome steel for both rings and balls, it ensures high durability and a long service life under substantial dynamic and static loads.
7005 ACD/P4ADBD Bearing Typical Application Areas
This high-rigidity, super-precision bearing is predominantly used in applications where extreme accuracy and stability are paramount. Key sectors include:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads.
- High-Frequency Motors: Where high rotational speeds and precision are required.
- Precision Instrumentation: In measuring devices and analytical equipment.
- Robotic Arm Joints: Providing the necessary rigidity and accuracy for precise movement.
