FAG Super Precision Bearings are high-precision bearings produced by FAG of Germany. Their precision is as high as P4S level, far exceeding the general bearing precision standards such as DIN/ISO or ABEC. FAG high-precision bearings can meet the most stringent needs in many industries and show excellent performance. FAG Super Precision Bearings have the following characteristics: High Precision: Precision up to P4S level, meeting the needs of high-precision applications. Long Life: The use of high-quality materials and exquisite manufacturing technology significantly extends the service life. Excellent Performance: Excellent performance in harsh environments such as high speed, high temperature, and heavy load, reducing noise, vibration and heat generation These bearings are widely used in high-precision machine tools, precision instruments, aerospace and other fields to ensure stable operation and efficient work of equipment.
As a cornerstone of the Schaeffler Group’s engineering legacy, FAG Super Precision Bearings are synonymous with unmatched accuracy, durability, and reliability in mission-critical systems. Designed for applications demanding micron-level precision, these bearings excel in high-speed, high-load, and thermally unstable environments, from CNC machine tools to aerospace gyroscopes. This comprehensive guide explores FAG’s super precision bearing portfolio, highlighting their technical innovations, industry-specific adaptations, and value-driven benefits.
roduct Series & Technical Specifications
- Angular Contact Ball Bearings
Optimized for axial/radial load management in high-speed rotary systems.
FAG XC Series (Single Row)
Contact Angle: 15° (C), 25° (D), or 40° (E) configurations.
Precision Class: ABEC 7/9 (ISO P4/P2 equivalent).
Speed Limit: Up to 1.8 million dmN (diameter × RPM).
Material: Hybrid ceramic options (silicon nitride balls + steel races) for thermal stability.
FAG HSS Series (Hybrid High-Speed)
Innovation: Patented cage design with PEEK (polyether ether ketone) for reduced friction at 20,000 RPM+.
Lubrication: Pre-greased with FAG Arcanol L75 for 10,000-hour service life.
- Cylindrical Roller Bearings
Engineered for ultra-high radial stiffness in machine tool spindles.
FAG NN30 Series (Double Row)
Load Capacity: Dynamic load rating up to 450 kN, static load 320 kN.
Accuracy: SP (Super Precision) grade with radial runout ≤2 μm.
Thermal Control: Integrated cooling channels for 50°C temperature reduction.
FAG HC Series (Tapered Bore)
Mounting: Hydraulic or mechanical adapter sleeves for rapid installation.
Application: Ideal for grinding machine spindles requiring <1 μm axial displacement.
- Thrust Bearings
Designed for pure axial loads in compact spaces.
FAG BSA Series (Single Direction)
Preload: Matched sets with 5 μm preload tolerance.
Coating: FAG Durotect B coating resists micropitting under boundary lubrication.
- Customized Solutions
Modified Geometry: Asymmetric raceways for reduced vibration in robotics.
Vacuum-Grade Bearings: For semiconductor lithography tools (cleanroom ISO Class 1 compliant).
Engineering Innovations
- Precision Manufacturing
Grinding Technology: Laser-controlled grinding achieves surface roughness Ra ≤0.05 μm.
Metrology: 100% post-production inspection with coordinate measuring machines (CMMs) and FFT vibration analyzers.
- Advanced Materials
Cronidur® Steel: Corrosion-resistant martensitic steel for marine/aerospace environments (HV 750 hardness).
Ceramic Hybrids: 60% lower thermal expansion vs. all-steel designs for thermal distortion control.
- Lubrication Systems
Solid Oil Technology: Polymer matrix lubricant extends relubrication intervals by 8x in sealed bearings.
Jet Lubrication Kits: Direct oil-air mist injection for spindle bearings at 30,000 RPM.
FAG Super Precision Bearings embody the pinnacle of mechanical engineering, transforming rotational motion into flawless performance. Whether enabling submicron machining accuracy in aerospace components or ensuring zero-downtime operation in high-speed robotic arms, FAG’s relentless focus on material science, precision manufacturing, and digital intelligence delivers measurable ROI. By partnering with FAG, industries gain more than a component—they secure a competitive edge in precision, reliability, and sustainability.
