7214 ACD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7214 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
2.22 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
24750 lbf
Limiting speed
28 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7214 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 7214 ACD/P4ADBB is a precision duplex pair of Angular Contact Ball Bearings in a Back-to-Back (DB) arrangement. This configuration is engineered to provide exceptional rigidity and stability, making it ideally suited for applications requiring high precision and the ability to withstand combined loads (radial and axial loads from both directions). Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and rotational performance for demanding industrial environments.
7214 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7214 | Basic bearing series, indicating a 70mm bore, 125mm OD, and 24mm single bearing width. |
| AC | Angular Contact ball bearing with a 25° contact angle. |
| D | Signifies a Duplex pair of bearings. |
| BB | Specifies the Back-to-Back (DB) mounting arrangement. |
| P4A | Indicates a high precision tolerance class for superior running accuracy. |
7214 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide effective spread, significantly increasing the moment stiffness of the bearing system. This is critical for applications where shaft deflection must be minimized.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to efficiently handle significant combined radial and axial loads from both directions simultaneously.
- Precision Performance: The P4A tolerance class ensures extremely tight dimensional and running accuracy, resulting in smooth operation, reduced vibration, and enhanced machine performance.
- Optimized for High Speeds: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 28,000 rpm. The bearings are pre-lubricated for immediate operation.
- Durable Construction: Manufactured from high-grade chrome steel for rings and balls, ensuring long service life and reliability under demanding conditions.
7214 ACD/P4ADBB Bearing Typical Application Areas
This high-precision, high-rigidity bearing is typically specified for:
- Machine Tool Spindles (e.g., milling, grinding)
- High-Speed Precision Spindles
- Industrial Pumps and Compressors
- Precision Gearboxes
- Robotic Arms and Precision Positioning Systems
