7204 ACD/P4ATBTD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7204 ACD/P4ATBTD Bearing Product Overview & Core Advantages
The 7204 ACD/P4ATBTD is a metric precision angular contact ball bearing designed for the most demanding applications. Its defining feature is its triplex back-to-back (TBT) matched arrangement, providing exceptional system rigidity and the ability to handle significant combined loads (radial and axial). Manufactured to a P4A super-precision tolerance class and preloaded to Class D (Heavy), this bearing is engineered for high-speed, high-accuracy machinery where uncompromising performance is critical.
Model Code Breakdown
- 7204: Basic series designation for a 20mm bore, 47mm OD angular contact ball bearing.
- A: Denotes a 25° contact angle, optimized for carrying high axial loads.
- CD: Indicates a triplex back-to-back (TBT) matched set with universal matching.
- P4A: Specifies the tolerance class, indicating extremely tight dimensional and running accuracy (super-precision).
- TBT: Reiterates the Triplex Back-to-Back arrangement of the three bearings in the set.
- D: Specifies the preload level as Heavy (Class D), maximizing rigidity.
7204 ACD/P4ATBTD Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The triplex back-to-back configuration creates an extremely stiff bearing system, effectively resisting complex moment loads. This design, combined with the 25° contact angle and heavy preload, delivers superior performance under heavy combined radial and axial loads.
High-Speed Capability: The phenolic resin cage is lightweight and robust, enabling smooth operation and reduced centrifugal forces at the limiting speed of 100,500 rpm. The open design facilitates efficient lubrication and cooling.
Precision Engineering: Adherence to the P4A tolerance class ensures minimal runout and vibration, which is paramount for applications requiring high rotational accuracy. The tight dimensional tolerances on the bore, outside diameter, and width guarantee predictable and reliable performance.
Durable Construction: Manufactured from high-grade chrome steel for both rings and balls, the bearing offers excellent wear resistance and a long operational life under demanding conditions.
7204 ACD/P4ATBTD Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles for milling, grinding, and drilling
- Precision Gearboxes and transmission systems
- High-Speed Compressors and Pumps
- Advanced Robotics and automation arms
- Aerospace Actuation Systems
- Other machinery requiring the ultimate in stiffness, precision, and speed.
