"轮齿表面" can be translated as "tooth surface" or "gear tooth surface" in English.
"Tooth surface" is a more general term that can be used in various contexts related to gears or other toothed components.
"Gear tooth surface" is more specific and clearly indicates that it refers to the surface of the teeth on a gear.
In most technical or engineering contexts, either expression would be appropriate, depending on the level of specificity required.