7213 CD/P4DBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7213 CD/P4DBA
Basic Information
System of measurement
Metric
Weight
2.05 kg
Tolerance class
P4
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
46 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
23850 lbf
Limiting speed
32.5 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
Price available upon request.
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7213 CD/P4DBA Bearing Product Overview & Core Advantages
The 7213 CD/P4DBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability under combined loads (radial and axial) and high-speed operation. Manufactured to P4 tolerance class, it ensures minimal runout and vibration, making it ideal for high-precision machinery. The pre-set extra light preload (Class A) eliminates internal clearance, delivering immediate high stiffness and precise shaft positioning.
7213 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7213 CD/P4DBA is decoded as follows:
- 7213: Basic bearing series, indicating a medium series angular contact ball bearing with a 65mm bore.
- C: Denotes a 15° contact angle, optimized for high-speed applications with significant axial loads.
- D: Indicates the bearing is part of a duplex (matched pair) set.
- DB: Specifies the Back-to-Back arrangement of the duplex pair, which provides high moment rigidity.
- P4: Identifies the tolerance class, corresponding to ISO P4 (ABEC 7) precision levels for superior running accuracy.
- A: Designates the extra light preload class.
7213 CD/P4DBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly increasing the bearing set's resistance to moment loads and enhancing overall system rigidity.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. The 15° contact angle is optimally balanced for high-speed performance while maintaining robust axial load capacity.
- Precision High-Speed Performance: The phenolic resin cage offers low weight, high strength, and excellent performance at high rotational speeds, contributing to the high limiting speed of 32,500 rpm. The P4 precision grade ensures smooth, low-vibration operation.
- Optimized Material & Lubrication: Components made from high-grade chrome steel provide excellent durability and fatigue life. The bearing is supplied lubricated, ready for immediate installation and initial operation.
7213 CD/P4DBA Bearing Typical Application Areas
This bearing is specifically engineered for high-precision, high-speed machinery, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads requiring high rigidity and running accuracy.
- Precision Gearboxes: In applications demanding minimal backlash and high positional accuracy.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small tool spindles.
- Industrial Pumps and Compressors: For rotors that operate at high speeds under significant axial thrust.
