7020 ACD/P4ATBTB
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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7020 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7020 ACD/P4ATBTB is a high-precision angular contact ball bearing supplied as a matched triplex set in a back-to-back (TBT) arrangement. This configuration is engineered to deliver exceptional system rigidity and handle significant combined loads (radial and axial) simultaneously. Manufactured to the exacting P4A tolerance class, it is designed for applications demanding the highest levels of rotational accuracy, high-speed capability, and operational reliability in a preloaded system.
Model Code Breakdown
- 7020: Basic series designation, indicating a 100 mm bore and 150 mm outside diameter.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and superior running accuracy.
- TBT: Specifies the Triplex Back-to-Back matched arrangement of three bearings, optimized for high moment stiffness.
- B: Indicates a Light preload is applied to the matched set, minimizing deflection and enhancing system stability.
7020 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The triplex back-to-back (TBT) configuration creates a highly rigid bearing system capable of withstanding complex combined loads and substantial overturning moments, making it ideal for precision spindles.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and 25° contact angle contribute to stable operation at high rotational speeds, with a limiting speed of 16,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width. This ensures precise shaft and housing fits, reduced vibration, and superior running accuracy.
Premium Materials: Constructed from chrome steel for both rings and balls, providing high fatigue life and durability under demanding operating conditions.
7020 ACD/P4ATBTB Bearing Typical Application Areas
This high-precision bearing set is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Machining Centers
- Other industrial machinery requiring extreme rigidity, high speed, and uncompromising accuracy.
