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What are the FAG bearing damage status and solutions? (3)

Update:20-07-2020
Summary:

1. Creep Damage state: The so-called creep means that w […]

1. Creep
Damage state: The so-called creep means that when a gap occurs on the mating surface of the FAG bearing, the sliding surface between the mating surfaces exhibits a mirror surface that is bright or dark, and sometimes the page is stuck. Wear occurs.
Cause: Insufficient interference or clearance fit. The adapter sleeve is not tight enough.
Measures: Check the amount of surplus, and implement anti-rotation measures. Tighten the adapter sleeve properly. Study the accuracy of shafts and FAG bearing boxes. Axial preload. The race wheel is fastened on the side. Bonding mating surface. Apply slip agent to the mating surface.
2. Burns
Damage state: raceway wheels, rolling elements, and cages heat rapidly during rotation until they become discolored, softened, welded, and damaged.
Cause: Poor lubrication. Excessive load (excessive preload). The speed is too large. The play is too small. Intrusion of water and foreign objects. The accuracy of the shaft and FAG bearing housing is poor, and the shaft deflection is large.
Measures: Study lubricants and lubrication methods. Correct the selection of FAG bearings. Study fit, FAG bearing clearance and preload. Improve the sealing device. Check the accuracy of the shaft and FAG bearing housing. Improve the installation method.
3. Electric erosion
Damage state: The so-called galvanic corrosion refers to the fact that when the current flows in the contact part of the FAG bearing raceway wheel and the rolling body, the thin lubricating film emits sparks, and the surface is locally melted and uneven.
Cause: The ground potential difference between the outer ring and the inner ring.
Measures: When setting the circuit, the current should not flow through the FAG bearing part. Insulate FAG bearings.
4. Rust, corrosion
Damage state: The rust and corrosion of FAG bearings include pit-shaped rust on the raceway wheel and rolling body surface, full-scale rust and corrosion.
Cause: Intrusion of water and corrosive substances (paint, gas, etc.). The lubricant is not suitable. Water droplets are attached due to the condensation of water vapor. Stop at high temperature and humidity. Heavy rust prevention during transportation. The storage state is inappropriate. Not suitable for use.
Measures: Improve the sealing device. Study lubrication methods. Anti-rust measures when stopping. Improve storage methods. Pay attention when using it.5. Installation scars
Damage state: Axial linear scratches caused on the raceway surface and rolling surface during use such as installation and disassembly.
Reason: The impact load during the installation and disassembly of the inner and outer rings at an oblique installation and disassembly.
Measures: Use appropriate tools to use the punching machine to prevent impact loads. Centering on each other during installation.
6. Discoloration
Damage state: due to temperature rise and lubricant reaction, the raceway wheels and rolling elements and cages become discolored.
Cause: Poor lubrication. The reflection with the lubricant causes hot oil immersion. The temperature rises greatly.
Measures: Improve the lubrication method.

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