71830 ACD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71830 ACD/P4DBB Bearing Product Overview & Core Advantages
The 71830 ACD/P4DBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) pair. This matched set is pre-loaded to Light / Class B specifications, delivering exceptional rotational accuracy and system rigidity. Engineered to handle combined loads (significant radial and axial loads in both directions), it is ideal for high-precision, high-speed applications requiring maximum stability. The P4 tolerance class ensures superior running accuracy for demanding operational environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71830 | Basic bearing series and size designation (150 mm bore, 190 mm OD, 40 mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two bearings supplied as a set). |
| DB | Back-to-Back arrangement of the duplex pair. |
| P4 | High precision tolerance class, superior to standard ABEC-7. |
71830 ACD/P4DBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a wide, rigid support system that effectively resists moment loads. This setup provides a high radial dynamic load rating of 17,842 lbf and a static load rating of 30,825 lbf, making it capable of handling heavy combined loads.
Optimized High-Speed Performance: The phenolic cage offers low friction and excellent high-speed capability, contributing to the bearing's limiting speed of 11,000 rpm. The 25° contact angle provides an optimal balance between axial load capacity and speed.
Precision & Longevity: Manufactured to P4 tolerance with tight dimensional control on bore, outside diameter, and width. The chrome steel rings and balls ensure high durability and wear resistance, suitable for a temperature range of -30°C to 110°C.
71830 ACD/P4DBB Bearing Typical Application Areas
The 71830 ACD/P4DBB is designed for high-performance machinery where precision and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes and Industrial Pumps
- High-Frequency Motors and Robotic Arm Joints
- Aerospace & Defense Positioning Systems
