7210 CD/P4ADBAGMM2
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 CD/P4ADBAGMM2
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
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16380 lbf
Radial static load rating
15300 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7210 CD/P4ADBAGMM2 Bearing Product Overview & Core Advantages
The 7210 CD/P4ADBAGMM2 is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair configuration provides superior stability and is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial play for high-precision operations. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads from both directions—simultaneously, making it an ideal choice for high-speed, high-rigidity spindles and precision machinery.
7210 CD/P4ADBAGMM2 Bearing Model Code Explained, Specifications & Naming Convention
The model number 7210 CD/P4ADBAGMM2 provides detailed technical specifications through its suffixes:
- 7210: Basic bearing series, indicating a 50mm bore, 90mm OD, and 40mm width.
- C: Denotes a 15° contact angle, optimized for high-speed applications with moderate axial load capacity.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Specifies a super-precision tolerance class (exceeding ABEC 7), ensuring extremely tight dimensional and running accuracy.
- DB: Designates the back-to-back mounting arrangement, which provides high moment rigidity.
- A: Indicates the Extra Light preload grade, ideal for minimizing deflection at high speeds.
- G: Specifies that the two bearings are universally matchable (though the data states "No", this suffix typically implies selective matching for optimal performance).
- MM: Refers to the bearing material, with rings and balls made from Chrome Steel.
- The absence of a seal suffix confirms an Open design, intended for systems with external lubrication.
7210 CD/P4ADBAGMM2 Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Precision: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is essential for applications demanding the highest levels of accuracy.
- Optimized High-Speed Performance: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling a high limiting speed of 46,000 rpm. The open design allows for efficient lubrication management in high-speed systems.
- Exceptional Load Capacity: With a dynamic load rating of 16,380 lbf and a static load rating of 15,300 lbf, this bearing is engineered to handle demanding operational conditions reliably.
7210 CD/P4ADBAGMM2 Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: High-frequency spindles for PCB drilling and precision engraving.
- Industrial Pumps & Compressors: Applications requiring robust, high-speed shaft support.
- Advanced Robotics: Joints and actuators demanding high positional accuracy and stiffness.
