7207 CD/P4AQBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7207 CD/P4AQBTB Bearing Product Overview & Core Advantages
The 7207 CD/P4AQBTB is a precision angular contact ball bearing designed for the most demanding applications. Its Quadruplex Tandem Back-to-Back (QBT) matched arrangement provides exceptional system rigidity and the capacity to handle significant combined loads. Manufactured to a P4A tolerance class and featuring a light preload (Class B), this bearing is engineered for high-precision, high-reliability scenarios requiring superior rotational accuracy and stability.
7207 CD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
- 7207: Basic series designation (35mm bore, 72mm OD).
- CD: Indicates a 15° contact angle and specific internal design optimized for high-speed operation.
- P4A: Denotes a super-precision tolerance class, exceeding ABEC 7 standards, ensuring minimal runout and vibration.
- QBTB: Specifies the matched set arrangement:
- Q (Quadruplex): A set of four bearings.
- BTB (Tandem Back-to-Back): The specific mounting configuration that maximizes rigidity and resistance to moment loads.
7207 CD/P4AQBTB Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Tandem Back-to-Back (QBT) arrangement creates an extremely stiff bearing system, capable of supporting heavy combined radial and axial loads from multiple directions. This configuration is ideal for applications where shaft deflection must be minimized.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and allowing for higher limiting speeds (41,000 rpm). The 15° contact angle further optimizes the bearing for high-speed operation.
Precision Engineering: The P4A tolerance class guarantees ultra-precise dimensions and running accuracy, which is critical for applications requiring minimal vibration and high positional accuracy. The bearings are supplied pre-lubricated and ready for installation.
7207 CD/P4AQBTB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is typically used in:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Spindles.
- Industrial Pumps and Compressors requiring high shaft stability.
- Aerospace and Defense instrumentation and control systems.
