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Corporate Governance

NSK Investor Relations - Corporate Governance: Financial Instruments and Exchange Law to control and document internal control systems.

Typical DGBB Running Traces

Services - Troubleshooting - Damage by Load / Contact Patterns: Typical Running Traces of Deep Groove Ball Bearings, showing the most common running trace generated when the inner ring rotates under a radial load only.

Typical RB Running Traces

Damage by Load / Contact Patterns

Services - Troubleshooting - Damage by Load / Contact Patterns: As bearings rotate, the raceways of the inner ring and outer ring make contact with the rolling elements. This results in a wear path on both the rolling elements and raceways.

Flaking

Troubleshooting - Linear Guides - Flaking: The rolling contact surface of the rail, the ball slide and the ball flakes away like scales.

Damaged Ball Recirculation Parts

Services - Troubleshooting - Linear Guides - Damaged ball recirculation parts: Balls become free from the ball slide due to broken plastic ball re-circulation parts.

Linear Guides

Services - Troubleshooting - Linear Guides: In the following troubleshooting selection for Linear Guides we show the most common types of damage condition, its possible cause and the taken countermeasures.

Outside Surface

Services - Troubleshooting - Damage by Location - Outside Surface: Cracks, Damage Type, Discoloration, Rust, Corrosion, Wear

Flaking

Services - Troubleshooting - Ball Screws - Flaking: The raceways of the screw shaft and ball nut and/or the surface of the ball peel off like scales because of fatigue.

Ball Screws

Services - Troubleshooting - Ball Screws: A guide to preventing and solving damage & failures due to careless handling, excessive misalignment, insufficient lubrication, contamination, etc.

Off-Highway Quarry Vehicles

NSK Europe - Mining Industry - Improved service from off-highway quarry vehicles

Achieving Longer Life from Quarrying Conveyors

NSK Mining Industry - Achieving longer life from Quarry conveyors

Vibration & Shock Loads

improved performance life against vibration & shock loads

Pumps Can Run for Longer...

NSK Bearings - Pumps can run for longer, more reliably, & with reduced maintenance

Fracture

Services - Troubleshooting - Damage by Type: Fracture refers to small pieces which were broken off due to excessive load or shock load acting locally on a roller corner or rib of a raceway ring.

Denting

Services - Troubleshooting - Damage by Type - Denting: When debris such as small metallic particles are caught in the rolling contact zone, Denting occurs on the raceway surface or rolling element surface.

Creep

Services - Troubleshooting - Damage by Type: Creep is the phenomenon in bearings where relative slippage occurs between fitting surfaces and thereby creates a clearance between them surface. Creep causes a shiny appearance with Scoring or Wear.

Peeling

Services - Troubleshooting - Damage by Type - Peeling: Dull or cloudy spots appear on surface along with light wear. From such dull spots, tiny cracks are generated downward to a depth of 5–10 µm. Small particles fall off and minor Flaking occurs widely.

Mounting Flaws

Services - Troubleshooting - Damage by Type - Mounting Flaws: Straight line scratches on surface of raceways or rolling elements caused during mounting or dismounting of bearing.

False Brinelling

Services - Troubleshooting - Damage by Type - False Brinelling: Among the different types of Fretting, false brinelling is the occurrence of hollow spots that resemble brinell dents and are due to Wear caused by vibration and swaying.