S71916 ACDGA/P4A
Sealed 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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S71916 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71916 ACDGA/P4A is a super-precision angular contact ball bearing engineered for applications demanding the highest levels of accuracy and performance. As a single bearing with a 25° contact angle and universal matching (SU) capability, it is designed to accommodate combined loads—high radial loads and axial loads in one direction—simultaneously. Its defining features include an extra light preload (Class A) and a P4A tolerance class, ensuring exceptional running accuracy, minimal vibration, and high system rigidity. This makes it an ideal choice for high-speed spindles and other precision machinery where reliability is paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Super-precision bearing |
| 7 | Angular contact ball bearing |
| 1916 | Bore diameter: 80 mm, Outside diameter: 110 mm, Width: 16 mm |
| AC | 25° contact angle |
| D | Enhanced internal design for optimized performance |
| GA | Pre-greased with specific lubricant |
| P4A | High precision tolerance class (superior to ABEC 7) |
S71916 ACDGA/P4A Bearing Structural Features & Performance Benefits
The S71916 ACDGA/P4A incorporates several advanced design features that deliver superior operational performance:
- High Rigidity and Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined radial and axial loads, providing stable and rigid support for precision spindles.
- Super-Precision Operation: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures minimal runout and exceptional rotational accuracy.
- Optimized High-Speed Performance: The lightweight phenolic resin cage and pre-greased lubrication contribute to low friction and stable operation at high speeds, with a limiting speed of 28,000 rpm.
- Sealed and Ready-to-Use: The bearing is sealed and pre-lubricated with grease, offering protection against contamination and providing long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71916 ACDGA/P4A Bearing Typical Application Areas
The S71916 ACDGA/P4A is ideally suited for high-performance applications requiring precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and precision engraving machines.
- High-Frequency Motors: Spindles for electric motors operating at very high RPMs.
- Medical Equipment: High-speed handpieces and dental drills.
- Aerospace and Defense: Gyroscopes and other precision navigation instruments.
