7207 ACD/P4AQBTC
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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7207 ACD/P4AQBTC Bearing Product Overview & Core Advantages
The 7207 ACD/P4AQBTC is a precision quadruplex matched angular contact ball bearing designed for applications requiring exceptional rigidity and load capacity. This P4A tolerance class bearing features a moderate preload (Class C) and is configured in a Tandem Back-to-Back (QBT) arrangement, enabling it to handle significant combined loads (radial and axial) simultaneously. Its phenolic cage and optimized geometry contribute to superior high-speed performance, making it ideal for high-precision, high-reliability machinery where positional accuracy is critical.
7207 ACD/P4AQBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7207 | Basic bearing series with 35mm bore, 72mm OD |
| ACD | 25° contact angle design for optimal axial load capacity |
| P4A | High precision tolerance class (superior to ABEC-7) |
| QBT | Quadruplex Tandem Back-to-Back matched arrangement |
| C | Moderate preload classification for enhanced rigidity |
7207 ACD/P4AQBTC Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Distribution: The quadruplex matched arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads while maintaining precise shaft positioning. The 25° contact angle provides optimal balance between radial and axial load capacity.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at limiting speeds up to 41,000 rpm. The open design facilitates efficient lubrication flow for heat dissipation.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications demanding exceptional rotational accuracy.
Superior Material Construction: Made from chrome steel for both rings and balls, the bearing delivers high fatigue resistance and long service life under demanding operating conditions.
7207 ACD/P4AQBTC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring extreme rigidity and accuracy
- High-Speed Machining Centers: Applications demanding both high rotational speeds and heavy cutting loads
- Precision Gearboxes: Industrial transmission systems where minimal deflection under load is critical
- Robotic Arm Joints: Precision automation equipment requiring high moment load capacity and positioning accuracy
- Aerospace Actuation Systems: Flight control mechanisms and other critical aerospace components
