7210 ACD/P4ADBD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 ACD/P4ADBD
Basic Information
System of measurement
Metric
Weight
0.92 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
15502 lbf
Radial static load rating
14738 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7210 ACD/P4ADBD Bearing Product Overview & Core Advantages
The 7210 ACD/P4ADBD is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This back-to-back (DB) matched set is preloaded to Heavy / Class D specifications, providing superior stiffness and rotational accuracy. It excels at handling combined loads (simultaneous radial and axial loads) from both directions, making it ideal for high-precision, high-rigidity systems. Manufactured to the exacting P4A tolerance class, this bearing ensures reliable performance in demanding operational environments.
7210 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
The model number 7210 ACD/P4ADBD is decoded as follows:
- 7210: Basic bearing series, indicating a 50 mm bore, 90 mm OD, and 40 mm width.
- AC: Angular Contact design with a 25° contact angle.
- D: Indicates a Duplex (two-bearing) set.
- /P4A: Denotes a P4A tolerance class, signifying very high running accuracy.
- DB: Specifies the Duplex Back-to-Back mounting arrangement.
- Heavy Preload (Class D): The bearings are preloaded to a heavy grade for maximum system rigidity.
7210 ACD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back (DB) duplex arrangement and heavy preload create an exceptionally stiff bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under load.
- Superior Load Capacity: Engineered with a 25° contact angle, this bearing is optimized to carry significant combined radial and axial loads from both directions simultaneously.
- Precision Performance: Manufactured to P4A tolerance standards, it guarantees minimal runout and smooth, precise rotation, which is essential for applications requiring high positional accuracy.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and guides the balls effectively, contributing to a high limiting speed of 46,000 rpm.
- Durable Construction: Components made from high-grade chrome steel provide excellent wear resistance and long service life under demanding conditions.
7210 ACD/P4ADBD Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery where rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles: For milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors.
- Robotic Arms and Automation Equipment.
- Medical Imaging Equipment and other precision instruments.
