7214 ACD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7214 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
3.32 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
72 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
32175 lbf
Radial static load rating
37350 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
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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7214 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7214 ACD/P4ATBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance under combined loads, handling significant radial and axial forces simultaneously. Manufactured to P4A tolerance class and featuring a light preload (Class B), it ensures smooth operation, minimal runout, and high positional accuracy. Its compact, matched design provides a complete, ready-to-install solution for high-stiffness spindle arrangements.
7214 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| P4A | Indicates a high-precision tolerance class with very tight running accuracy limits. |
| TBT | Signifies a Triplex Back-to-Back matched set of three bearings, providing maximum rigidity and moment load resistance. |
7214 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates an extremely rigid bearing system, effectively resisting moment loads and shaft deflection, which is critical for maintaining precision under heavy cutting forces.
- Superior Load Capacity: The 25° contact angle and triple-bearing configuration provide excellent capacity for combined radial and axial loads, ensuring reliable performance in demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the P4A precision and light preload contribute to smooth operation, low heat generation, and a high limiting speed of 28,000 rpm.
- Pre-Configured Precision: Supplied as a factory-matched set, the three bearings are selectively assembled to achieve optimal preload and runout characteristics, eliminating complex on-site matching and ensuring consistent, high-performance operation.
7214 ACD/P4ATBTB Bearing Typical Application Areas
This bearing is 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 Spindles: PCB drilling machines, precision grinding heads.
- High-Frequency Motors: Spindles for high-RPM electric motors.
- Other Precision Rotary Equipment: Where a pre-matched, high-stiffness bearing solution is required.
