7220 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7220 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7220 ACD/P4ADBC is a precision duplex angular contact ball bearing set designed for demanding applications requiring exceptional rigidity and rotational accuracy. This matched back-to-back (DB) arrangement is preloaded to Moderate / Class C specifications, enabling it to withstand combined radial and axial loads simultaneously. Manufactured to a P4A tolerance class, it offers superior running accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and reliable performance are critical.
7220 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 7220: Basic bearing series, indicating a 100mm bore, 180mm OD, and 68mm width.
- A: Denotes a 25° contact angle, optimized for carrying higher axial loads.
- C: Indicates a Moderate / Class C preload applied to the bearing set.
- D: Specifies the bearing set is in a Duplex Back-to-Back (DB) arrangement.
- P4A: The tolerance class, signifying very high precision for dimensional and running accuracy.
- DBC: Further defines the matched set as Duplex Back-to-Back with a specific preload (C).
7220 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and provides exceptional stability. With a 25° contact angle and Moderate preload, this bearing set is engineered to handle significant combined radial and axial loads, offering a dynamic load rating of 54,450 lbf and a static load rating of 58,500 lbf.
Precision & High-Speed Performance: Built to P4A tolerance class standards, this bearing ensures minimal runout and vibration. The phenolic cage is lightweight and robust, contributing to smooth operation at high speeds, with a limiting speed of 16,000 rpm. The bearings are pre-lubricated for immediate operation.
Durable Construction: Both rings and balls are made from high-grade Chrome Steel, providing excellent wear resistance and longevity. The open seal type allows for optimal lubrication management in controlled environments.
7220 ACD/P4ADBC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for:
- Machine Tool Spindles
- High-Speed Grinding & Milling Heads
- Precision Gearboxes
- Industrial Pumps & Compressors
- Robotic Arm Joints & Precision Rotary Axes
