71826 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71826 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71826 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Manufactured to P4 tolerance class, it offers superior running precision. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement, simplifying mounting and enabling optimal stiffness and moment load capacity. This bearing is pre-lubricated and features an extra light preload (Class A), making it ideal for high-speed spindles and other precision machinery where minimal deflection and high rotational accuracy are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71826 | Basic bearing series and size designation (130mm bore, 165mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a universal matchable (SU) bearing, designed for paired mounting. |
| /P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| DGA | Denotes the extra light preload (Class A) applied to the bearing. |
71826 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle enables the bearing to support significant combined loads (radial and axial). When mounted in pairs, the arrangement provides high system rigidity, effectively resisting moment loads.
Precision and High-Speed Performance: Manufactured to P4 tolerance standards with tight dimensional control on the bore diameter and outside diameter. The lightweight phenolic cage and optimized internal geometry contribute to low friction and a high limiting speed of 11,000 rpm, making it a true high-speed bearing.
Optimized Internal Design: The bearing incorporates 35 high-grade chrome steel balls with a diameter of 9.525 mm, ensuring smooth operation and high dynamic load capacity (13,320 lbf). The universal matching feature ensures precise performance when used in sets.
Ready-to-Install: The bearing is pre-lubricated, facilitating immediate installation and initial operation within its specified temperature range of -30°C to 110°C.
71826 ACD/P4DGA Bearing Typical Application Areas
The 71826 ACD/P4DGA is engineered for high-performance applications, including:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring high precision and speed.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational stability are paramount.
- Precision Instrumentation: In measuring and testing equipment that demands exceptional accuracy.
- Robotics and Automation: For high-accuracy rotary joints and arm assemblies.
