7212 ACD/P4ADGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7212 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
1.62 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19890 lbf
Radial static load rating
20250 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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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7212 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7212 ACD/P4ADGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. Engineered to simultaneously handle combined radial and axial loads, this bearing features a universal matchable (SU) design, allowing two bearings to be paired for optimal performance in preloaded arrangements. With its P4A super-precision tolerance and light preload (Class B), it delivers superior running accuracy, making it ideal for high-speed spindles and other demanding machinery where minimal deflection and vibration are critical.
7212 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7212 ACD/P4ADGB provides detailed technical specifications:
- 7212: Basic bearing series with 60mm bore, 110mm OD, and 44mm width.
- A: Denotes a 25° contact angle, optimized for carrying higher axial loads.
- CD: Indicates a universal matchable (SU) design. Two bearings can be mounted in either a back-to-back (DB) or face-to-face (DF) arrangement to accommodate combined loads.
- P4A: Specifies a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy and high-speed capability.
- DGB: Represents a light preload (Class B), which reduces bearing deflection under operational loads, increases system rigidity, and improves positioning accuracy.
7212 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double-row angular contact design and 25° contact angle provide high radial and axial stiffness, enabling the bearing to support significant combined loads. The universal matchable pairing of two bearings further enhances system stability and load distribution.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is essential for applications requiring extreme rotational precision.
- Optimized High-Speed Operation: The phenolic resin cage offers low weight and excellent dimensional stability at high speeds, contributing to a limiting speed of 36,000 rpm. The standard lubrication is suitable for the specified operating range.
- Preload for Accuracy: The light preload (Class B) minimizes axial and radial play, resulting in improved shaft positioning accuracy and reduced noise levels during operation.
7212 ACD/P4ADGB Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and other high-accuracy machining.
- High-Speed Motors: Servo motors, spindle motors, and other electric drives requiring high rigidity and speed.
- Robotics: Joint and arm assemblies where precision movement and load capacity are critical.
