Which Bearing Closure Are Best?

How to choose the bearing closures type?
Which bearing Closures are the best?
It depends on the bearing application and ambient, the enviroment.

Hope the below table can help you!

Considering point	Open	Shield(ZZ)	Seal(RS)
Closure Materia	NA	Steel	Rubber
Cotaminate protection	No	Good	Very good
Protection from moisture and dirt	No	Good	Very Good
Retain lubrication	No	Good	Very Good
Impact by speed	No	No	Yes
Water proof	No	Good	Very Good
Withstand higher temperature	Higher	Higher	Lower
Increasing the temperature	No	No	Yes

by Jota Bearing