71816 ACD/P4DBC
71800 Series Super Precision Angular Contact Ball Bearings
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71816 ACD/P4DBC Bearing Product Overview & Core Advantages
The 71816 ACD/P4DBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded to Moderate (Class C) specifications, delivering superior rotational stability and stiffness. Its primary advantage lies in its ability to withstand combined loads—significant radial and axial loads in both directions—making it ideal for high-precision, high-rigidity systems where minimal deflection is critical. Manufactured to P4 tolerance class, it ensures exceptional running accuracy for superior performance.
71816 ACD/P4DBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing designation indicating bore diameter: 80 mm, outside diameter: 100 mm, and width: 20 mm. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Indicates a Duplex (two-bearing) set. |
| P4 | Specifies the high precision tolerance class (P4), ensuring extremely tight dimensional and running accuracy. |
| DB | Denotes the Back-to-Back arrangement, which provides high moment rigidity and stability. |
| C | Specifies the Moderate preload (Class C), optimizing bearing stiffness and minimizing axial/radial play. |
71816 ACD/P4DBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a 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 and optimized internal geometry enable high radial dynamic load rating (4972 lbf) and static load rating (7762 lbf), handling significant radial and bidirectional axial loads simultaneously.
Precision Performance: Manufactured to P4 tolerance class with tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for high-accuracy applications.
Optimized High-Speed Operation: The phenolic cage offers low weight and excellent operational characteristics, contributing to a high limiting speed of 28,000 rpm. The bearing is pre-lubricated for immediate operation.
Durable Construction: Components made from chrome steel provide high hardness, wear resistance, and long service life under demanding conditions within a temperature range of -30°C to 110°C.
71816 ACD/P4DBC Bearing Typical Application Areas
This high-precision duplex bearing set is specifically engineered for applications requiring maximum rigidity and accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning spindles where precision and stiffness are paramount
- Precision Gearboxes: Industrial gearboxes requiring accurate shaft positioning and high load capacity
- Robotic Systems: High-accuracy robotic arms, joints, and precision automation equipment
- Medical Equipment: High-speed dental handpieces, imaging systems, and laboratory automation
- Aerospace Systems: Actuators, control systems, and auxiliary power units requiring reliable precision bearings
