7213 ACD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7213 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
3.08 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.004mm to 0
Width
69 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
31050 lbf
Radial static load rating
34425 lbf
Limiting speed
36 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
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In Stock
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7213 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7213 ACD/P4ATBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This bearing is supplied as a Triplex Back-to-Back (TBT) matched set, enabling it to handle significant combined loads—simultaneous radial and axial forces—with high stability. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The pre-lubricated and open design facilitates optimal performance in controlled environments.
7213 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact Angle of 25°. Optimized for axial load capacity. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for superior running accuracy. |
| TBT | Triplex Back-to-Back arrangement. A set of three bearings matched for maximum rigidity and moment load capacity. |
7213 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Triplex Back-to-Back (TBT) configuration provides an exceptionally stiff bearing system, effectively resisting complex moment loads and ensuring precise shaft positioning.
- Superior Load Capacity: The 25° contact angle and robust construction deliver high radial dynamic load rating (31,050 lbf) and static load rating (34,425 lbf), suitable for heavy combined loads.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 36,000 rpm. The P4A precision ensures smooth, low-vibration operation at high velocities.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter (65 mm), outside diameter (120 mm), and width (69 mm) for predictable and reliable performance.
7213 ACD/P4ATBTB Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Precision Spindles
- High-speed Robotics and automation arms
- Advanced Aerospace control systems and gyroscopes
- Medical equipment such as high-speed dental handpieces
