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Bearing Units

NSK bearing units, plummer blocks and mounted units help improve reliability and increase productivity.

Super Precision Roller Bearings - Products

NSK Super Precision Roller Bearings - Designed to achieve high-speed performance combined with high rigidity and to deliver cost effective high-speed performance

Hub II

Wheel Hub Units

Wheel Hub Units - NSK offers compact and lightweight hub unit bearings with built-in ABS sensors.

Electric Vehicles (EV)

NSK Automotive - Bearings for Electric Vehicles: NSK bearings contribute to an exceptional electric driving performance providing quieter interiors.

Indentations

Troubleshooting - Linear Guides - Indentations: Dents on the raceway at each ball location similar to the deformation caused by a Brinell Hardness Test or on the raceway caused by contamination or metallic particles.

Electrolytic Corrosion

Services - Troubleshooting - Linear Guides - Electrolytic corrosion: Pits like spot corrosion on balls and raceways.

Wear

Services - Troubleshooting - Linear Guides - Wear: Severe friction resulted in serious wear on the rolling contact surface of raceway and/or balls.

Fretting

Services - Troubleshooting - Linear Guides - Fretting: Fretting is a type of wear that is caused by relative repeated rubbing with minute amplitude between contacting surfaces.

Corrosion

Services - Troubleshooting - Linear Guides - Corrosion: Corrosion on raceways and balls.

Component (Ring / Ball / Roller / Cage)

Services - Troubleshooting - Damage by Location on Components: Ring, Ball, Roller, Cage

Sliding Surface (Roller End / Rib / Flange / Cage)

Services - Troubleshooting - Damage by Location - Sliding Surface (Roller end, Rib, Flange): scoring, cracks, wear

Entire Bearing

Services - Troubleshooting - Damage by Location on the Entire Bearing as rust and corrosion

Discoloration

Services - Troubleshooting - Damage by Type - Discoloration of cages, rolling elements and raceway rings occurs due to their reacting with lubricant at high temperature.

Pitting

Services - Troubleshooting - Damage by Type - Pitting: The pitted surface has a dull luster which appears on the rolling element surface or raceway surface.

Indentations

Services - Troubleshooting - Ball Screws - Indentations on the raceway at each ball location caused by a Brinell Hardness Tester or by contamination or by metal particles.

Breakage of Shaft End

Services - Troubleshooting - Ball Screws - Breakage of shaft end: Shaft end (mainly bearing journal) broke completely.

Wear

Services - Troubleshooting - Ball Screws - Wear: Severe friction resulted in serious wear on the rolling contact surface of raceways.

Fretting

Services - Troubleshooting - Ball Screws - Fretting: Frettings are on the raceways caused by a relative small amplitude of rubbing between mated contact surfaces.

Breakage of Ball Recirculation Parts

Services - Troubleshooting - Ball Screws - Breakage of ball recirculation parts: Damage on the tongue of ball return tube (ball pick up finger).