Standard seal with a rubber-covered outer diameter for a tight fit in the housing. Similar to Form A but includes an additional to protect against external dirt and sand. Forms B/C:
: Features an additional dust lip to prevent external contamination. Type B : Metal outer diameter for more rigid housing bores. din 3760 pdf
If you work in mechanical engineering, automotive design, or maintenance, you have likely encountered the term . It is one of the most referenced standards for rotary shaft seals—critical components that keep oil in and contaminants out of machinery. Standard seal with a rubber-covered outer diameter for