7016 ACD/P4AQGA
7000 Series Super Precision Angular Contact Ball Bearings
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7016 ACD/P4AQGA Bearing Product Overview & Core Advantages
The 7016 ACD/P4AQGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads—significant radial loads alongside high unidirectional axial loads—thanks to its 25° contact angle. Its Extra Light (Class A) preload ensures minimal runout and high rotational accuracy right from installation, making it ideal for high-precision, high-rigidity systems. The universal matchable (SU) design allows for flexible mounting arrangements in sets, providing designers with versatile solutions for complex spindle configurations.
7016 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7016 | Basic bearing series and size designation (80mm bore, 125mm OD, 88mm width) | Defines the core bearing dimensions and series characteristics. |
| AC | Angular Contact design with a 25° contact angle | Optimized for high axial load capacity and high rigidity. |
| D | Two bearings in a universal matchable (SU) pair | Indicates the bearing is supplied as part of a universal matchable set for duplex mounting. |
| P4A | High precision tolerance class | Guarantees extremely tight dimensional and running accuracy for precision applications. |
| QGA | Specific internal clearance and preload group (Extra Light / Class A) | Ensures consistent, low starting torque and high positional accuracy in preloaded arrangements. |
7016 ACD/P4AQGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design, combined with a 25° contact angle and phenolic cage, provides superior stiffness, enabling the bearing to support high combined loads (37,125 lbf dynamic, 52,200 lbf static) with minimal deflection. This makes it exceptionally stable under complex load conditions.
Precision & Speed Performance: Manufactured to P4A tolerance standards and featuring an open design with a lightweight phenolic cage, the bearing achieves a high limiting speed of 28,000 rpm. The extra light preload (Class A) minimizes vibration and ensures smooth, precise operation at high speeds.
Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it can be mounted in various preloaded configurations (back-to-back, face-to-face, or tandem) with other identical bearings. This design flexibility is critical for building high-precision spindle assemblies that require controlled axial stiffness and thermal management.
Material & Construction: Constructed from high-grade chrome steel for both rings and balls, the bearing ensures long-term durability and consistent performance within a temperature range of -30°C to 110°C.
7016 ACD/P4AQGA Bearing Typical Application Areas
The 7016 ACD/P4AQGA is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motor spindles.
- Robotics: High-accuracy rotary joints and arm actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment.
