7214 CD/P4AQBCA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7214 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 7214 CD/P4AQBCA is a precision angular contact ball bearing configured in a Quadruplex Back-to-Back (QBC) matched set. This high-performance arrangement is engineered to deliver exceptional system rigidity and stability, making it ideal for applications requiring the utmost accuracy. Its design is optimized to handle combined loads (radial and axial) simultaneously, with the back-to-back mounting providing high resistance to moment loads. Manufactured to a P4A tolerance class and featuring an Extra Light (Class A) preload, this bearing is a premier choice for high-speed, high-precision machinery where operational reliability is critical.
Model Code Breakdown
- 7214: Basic bearing series, denoting a 70mm bore and 125mm outside diameter.
- C: Signifies a 15° contact angle, optimized for high-speed operation.
- D: Indicates the bearing is supplied as part of a matched set.
- P4A: Denotes a very high precision tolerance class, exceeding ABEC 7 standards, which ensures minimal runout and superior rotational accuracy.
- QBC: Specifies the Quadruplex Back-to-Back arrangement of the four bearings in the set, a configuration that provides maximum rigidity.
- A: Designates an Extra Light preload (Class A), which minimizes friction and heat generation for superior high-speed performance.
7214 CD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates a highly rigid bearing system capable of supporting significant combined radial and axial loads, as well as overturning moments. This is reflected in its high dynamic (40,950 lbf) and static (52,200 lbf) load ratings.
High-Speed Performance: The combination of a 15° contact angle, Extra Light preload, and a lightweight phenolic resin cage enables a high limiting speed of 28,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high velocities.
Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees precise shaft positioning and minimal vibration for ultra-smooth rotation.
Material & Lubrication: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and durability. The bearing is pre-lubricated for immediate operation.
7214 CD/P4AQBCA Bearing Typical Application Areas
This bearing is specifically designed for the most demanding high-precision and high-speed applications, including:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-frequency Precision Spindles
- High-Speed Compressors and Pumps
- Advanced Robotic Drives and Automation Systems
- Precision Test and Measurement Equipment
