71806 ACD/P4DT
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71806 ACD/P4DT Bearing Product Overview & Core Advantages
The 71806 ACD/P4DT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement consists of two matched bearings, preloaded to deliver superior high rigidity and axial load capacity in one direction. Engineered to P4 tolerance class standards, it ensures minimal running noise and vibration, making it ideal for high-speed spindles and precision machinery where uncompromising reliability is critical.
71806 ACD/P4DT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing designation (30mm bore, 42mm OD, 14mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | Duplex arrangement (two bearings) |
| P4 | High Precision tolerance class for superior running accuracy |
| DT | Duplex Tandem mounting arrangement for maximum axial load capacity in one direction |
71806 ACD/P4DT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement with factory-applied preload creates a highly rigid bearing system capable of withstanding heavy axial loads in one direction while maintaining excellent rotational accuracy. The optimized 25° contact angle provides an ideal balance between radial and axial load carrying capability.
Precision Performance: Manufactured to P4 tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior positioning accuracy in precision applications.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 100,500 rpm, making it suitable for high-speed spindle applications.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding operating conditions.
71806 ACD/P4DT Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and optical devices requiring extreme accuracy
- High-Speed Motors - Spindle motors and servo motors demanding minimal vibration
- Aerospace Components - Gyroscopes and navigation systems requiring precision bearings
- Medical Equipment - Dental handpieces and surgical tools where reliability is critical
