55 × 90 × 18 mm. Single-row deep-groove ball bearing in size 55 × 90 × 18 mm. Check the complete designation and suitability for the specific application. Inner diameter d = 55 mm, outer diameter D = 90 mm, width B = 18 mm.
30 × 60 × 21 mm. thrust ball bearing is designed to carry axial load. Always compare the full designation and design with the original bearing when selecting a replacement.