71812 ACDGC/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71812 ACDGC/P4 Bearing Product Overview & Core Advantages
The 71812 ACDGC/P4 is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with Universal Matchable (SU) designation, it can be universally paired with other bearings from the same manufacturing lot to form preloaded sets without selective mounting. Its P4 tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and precision machinery. The bearing features a 25° contact angle and moderate preload (Class C), providing optimal stiffness for handling combined radial and axial loads simultaneously.
71812 ACDGC/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71812 | Basic bearing designation with 60mm bore, 78mm OD, 10mm width |
| AC | Angular Contact design with 25° contact angle |
| DGC | Duplex arrangement, Ground to universal match standards |
| P4 | Super precision tolerance class for high-speed applications |
71812 ACDGC/P4 Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 25° contact angle and 28 chrome steel balls provide excellent capacity for combined loads, with dynamic load rating of 2858 lbf and static load rating of 3015 lbf.
High-Speed Performance: The phenolic cage and precision-ground raceways enable operation at limiting speeds up to 33,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be universally paired with other bearings from the same lot to create preloaded sets of up to 3 bearings without selective mounting.
Premium Material Selection: Constructed from chrome steel rings and balls with phenolic cage, providing excellent durability and performance across a temperature range of -30°C to 110°C.
71812 ACDGC/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: CNC machining equipment requiring extreme accuracy
- Precision Instrumentation: Measuring devices and laboratory equipment
- Robotics: High-precision robotic arm joints and positioning systems
- Medical Equipment: Dental handpieces and surgical tool spindles
- Aerospace Components: Guidance systems and precision actuators
