7216 CD/P4ADBA
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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7216 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7216 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched set features an Extra Light (Class A) preload, ensuring minimal axial and radial runout for superior performance in high-speed, high-precision environments. Its P4A tolerance class guarantees tight dimensional control, making it ideal for machine tool spindles and other precision machinery where high rigidity and stability under combined loads are critical.
7216 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7216 | Basic bearing designation (80mm bore, 140mm OD, 52mm width) |
| C | 15° contact angle |
| D | Duplex Back-to-Back (DB) arrangement |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| DB | Duplex Back-to-Back mounting designation |
| A | Extra Light preload classification |
7216 CD/P4ADBA Bearing Structural Features & Performance Benefits
Optimized Rigidity and Load Capacity: The back-to-back duplex arrangement creates a wide effective spread between load centers, significantly enhancing moment stiffness and enabling the bearing set to handle combined radial and axial loads from both directions simultaneously. The 15° contact angle provides an optimal balance between axial load capacity and speed capability.
High-Speed Precision: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's limiting speed of 28,000 rpm. The P4A precision grade and tight dimensional tolerances on the bore, outside diameter, and width guarantee smooth, vibration-free operation.
Premium Material Construction: Manufactured from high-grade chrome steel for both rings and balls, this bearing offers high fatigue life and durability. The set is supplied pre-lubricated and ready for installation, operating effectively within a temperature range of -30°C to 110°C.
7216 CD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring maximum rigidity and running accuracy.
- Precision Gearboxes: Applications where low noise, high speed, and precise shaft positioning are essential.
- High-Frequency Motors and Spindles: For CNC machining centers and other automated equipment.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments demanding smooth, reliable rotation.
- Robotic Arm Joints and Rotary Tables: Providing precise motion control with high moment stiffness.
