7212 ACD/P4AQGD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7212 ACD/P4AQGD
Basic Information
System of measurement
Metric
Weight
3.24 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
88 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
32850 lbf
Radial static load rating
40500 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
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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7212 ACD/P4AQGD Bearing Product Overview & Core Advantages
The 7212 ACD/P4AQGD is a precision angular contact ball bearing designed for applications requiring exceptional rigidity and load capacity. This universal matchable bearing belongs to the P4A tolerance class, ensuring superior running accuracy. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously, making it ideal for high-precision, high-stiffness machinery. The heavy preload (Class D) minimizes deflection under load, providing outstanding operational stability. Pre-lubricated for immediate use, it offers reliable performance within a wide temperature range.
7212 ACD/P4AQGD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic series designation: 12mm bore diameter (60mm actual), 110mm OD, 88mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Heavy Preload / Class D. |
| P4A | High precision tolerance class (superior to ABEC 7). |
| QGD | Indicates a set of 4 bearings supplied as a universally matchable (SU) set. |
7212 ACD/P4AQGD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double-row angular contact design and heavy preload provide maximum stiffness, effectively resisting operational deflection. It supports substantial combined loads with a dynamic load rating of 32,850 lbf and a static load rating of 40,500 lbf.
- Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures smooth, quiet operation and is suitable for high-speed applications up to 36,000 rpm.
- Universal Matchability (SU): The bearings are supplied in a pre-matched set of 4, allowing for flexible mounting arrangements (back-to-back, face-to-face, or tandem) to optimize performance for specific load conditions.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, it offers excellent wear resistance and a long service life within its specified temperature range of -30°C to 110°C.
7212 ACD/P4AQGD Bearing Typical Application Areas
This bearing is engineered for demanding applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Industrial Pumps.
- High-Frequency Motors and Robotic Actuators.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other precision mechanisms.
