71804 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71804 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71804 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in pre-lubricated matched pairs, it delivers superior rigidity and can accommodate combined loads (radial and axial) simultaneously. Its P4 tolerance class and phenolic cage construction make it ideal for high-precision, high-reliability applications where minimal runout and stable operation are critical.
71804 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation (20mm bore, 32mm OD, 14mm width) |
| ACD | Angular Contact Design with 25° contact angle |
| P4 | High precision tolerance class (superior to ABEC 7) |
| DGA | Universal matchable pair (SU designation) with preload |
71804 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal vibration and precise shaft positioning.
Optimized Contact Design: The 25° contact angle provides excellent axial load capacity while maintaining good radial load performance, making it suitable for combined loading conditions.
High-Speed Capability: The phenolic cage and optimized internal geometry enable exceptional limiting speeds up to 121,000 rpm, ideal for high-speed spindle applications.
Universal Matching: As Universal Matchable (SU) bearings supplied in matched pairs, they can be arranged in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements for rigidity and load distribution.
Premium Materials: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and durability under demanding operating conditions.
71804 ACD/P4DGA Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Spindle motors and high-RPM drive systems
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Gyroscopes and navigation systems
- Semiconductor Manufacturing - Wafer processing equipment and precision positioning systems
