7216 ACD/P4QBCA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7216 ACD/P4QBCA Bearing Product Overview & Core Advantages
The 7216 ACD/P4QBCA is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. Engineered to a P4 tolerance class, this set delivers exceptional rotational accuracy and dimensional stability. Its back-to-back (QBC) arrangement is optimized to handle combined loads, including significant radial loads and thrust loads in both directions, while providing high rigidity and excellent running stability. The extra light preload (Class A) ensures smooth, quiet operation at high speeds, making it an ideal choice for high-precision, high-reliability spindles and machinery.
7216 ACD/P4QBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7216 | Basic bearing designation: 80 mm bore, 140 mm OD, 26 mm single width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| QBCA | Specifies a Quadruplex (4-bearing) set in a Back-to-Back arrangement with Extra Light (Class A) preload. |
7216 ACD/P4QBCA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The quadruplex back-to-back configuration creates a highly rigid bearing system capable of withstanding heavy combined radial and axial loads from both directions. This arrangement increases moment stiffness significantly.
- Precision & Speed Performance: Manufactured to P4 tolerance standards, these bearings ensure minimal runout and vibration. The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 28,000 rpm.
- Optimized Internal Geometry: The 25° contact angle provides an excellent balance between radial and axial load capacity. The use of chrome steel balls and rings ensures high durability and fatigue life.
- Ready-to-Install Set: Supplied as a pre-matched and pre-lubricated quadruplex set, ensuring optimal load sharing and performance right out of the box, simplifying installation and guaranteeing system integrity.
7216 ACD/P4QBCA Bearing Typical Application Areas
The 7216 ACD/P4QBCA is engineered for high-performance machinery requiring utmost precision and rigidity. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors and High-Speed Drives.
- Industrial Pumps and Compressors operating at high rotational speeds.
