7207 ACD/P4AQBCC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7207 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7207 ACD/P4AQBCC is a precision quadruplex matched bearing set designed for applications requiring exceptional rigidity and accuracy. This angular contact ball bearing configuration features a back-to-back arrangement (QBC) and is manufactured to P4A tolerance class for superior running precision. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, making it ideal for high-speed, high-precision spindles. The set comes pre-lubricated and with a moderate preload (Class C) applied, ensuring immediate operational readiness and consistent performance.
7207 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7207 | Basic bearing series, 35mm bore, 72mm OD, 68mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards. |
| QBCC | Specifies a Quadruplex Back-to-Back (QBC) matched set with moderate preload (Class C). |
7207 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The quadruplex back-to-back arrangement creates an extremely rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: The 25° contact angle is optimized to support significant axial loads in addition to high radial loads, with a dynamic load rating of 18,135 lbf and a static load rating of 18,675 lbf.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The precision P4A grading ensures smooth, low-vibration operation at high speeds.
- Pre-Configured for Performance: The set is supplied as a matched quadruplex set with a factory-applied moderate preload, eliminating complex installation calculations and ensuring optimal bearing performance and longevity from startup.
7207 ACD/P4AQBCC Bearing Typical Application Areas
- Machine Tool Spindles: CNC milling centers, grinding spindles, and lathe spindles.
- High-Frequency Motors: Spindles for PCB drilling and high-speed routing.
- Precision Instrumentation: Rotary tables, measuring devices, and optical scanners.
