And SURFACE WEAR AND SURFACE FATIGUE
Terminology
Abrasive wear
One hard and sharp material sliding or rubbing against a
material that is softer—material removal
Adhesive wear
Two materials in contact that transfer material from one to
the other; removed material “adheres” to mating surfaces
Surface Wear – Surface Fatigue
Two surfaces contacting one another under pure rolling, or
rolling with a small amount of sliding in contact.
Examples of abrasive wear
1. polishing
2. tumbling
3. grinding
Examples of adhesive wear
1. scoring
2. cold welding
Examples of surface wear
1. ball and roller bearings
2. spur and helical gears
3. cams and roller followers
http://www.public.iastate.edu/~gkstarns/ME417/surface.pdf

Mivel itt rendeltetésszerű használatról van szó, szerintem surface wear a megoldás.