7214 ACD/P4ADFB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7214 ACD/P4ADFB
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 Face-to-Face (DF)
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/P4ADFB Bearing Product Overview & Core Advantages
The 7214 ACD/P4ADFB is a precision duplex angular contact ball bearing configured in a face-to-face (DF) arrangement. Engineered to the exacting P4A tolerance class, it is designed for applications demanding exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to handle combined loads, including significant radial and bidirectional axial loads, making it an ideal solution for high-precision, high-rigidity spindles and systems. The matched set, preloaded to Light / Class B, ensures optimal performance and stiffness right from installation.
7214 ACD/P4ADFB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7214 ACD/P4ADFB is decoded as follows:
- 7214: Basic series designation for a double row angular contact ball bearing with a 70mm bore.
- A: Signifies a 25° contact angle, optimized for carrying higher axial loads.
- C: Indicates the use of a phenolic (polyamide) cage, beneficial for high-speed operation and reduced friction.
- D: Denotes a duplex (two-bearing) set.
- P4A: Specifies the ultra-precision tolerance class, exceeding ABEC 7 standards, for superior running accuracy.
- DF: Defines the face-to-face mounting arrangement, which provides high rigidity and accommodates moment loads.
- B: Indicates the Light preload level applied to the matched set.
7214 ACD/P4ADFB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement and double row design create an exceptionally rigid bearing system capable of withstanding combined radial and axial loads from both directions. The 25° contact angle further enhances axial load carrying capacity.
- High-Speed Performance: The lightweight and robust phenolic cage (C) is instrumental in achieving a high limiting speed of 28,000 rpm, ensuring stable operation at elevated rotational velocities.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional tolerances on bore, outside diameter, and width, this bearing guarantees minimal runout and superior positional accuracy for precision machinery.
- Optimized for Performance: The bearings are supplied as a preloaded matched set, eliminating internal clearance and ensuring immediate, precise, and stiff performance upon installation without requiring complex adjustment.
7214 ACD/P4ADFB Bearing Typical Application Areas
The 7214 ACD/P4ADFB is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and precision boring heads.
- High-Frequency Motors: Spindles for electric motors operating at very high RPMs.
- Robotics: High-accuracy joints and rotary axes.
