Understanding Bearing Seal Types and Applications
Bearing seals are critical components that prevent contamination ingress and lubricant leakage. The two primary types are contact seals, which physically touch the inner ring, and non-contact seals, which create narrow gaps. Contact seals provide superior protection against contaminants but generate more friction and heat. Non-contact seals offer lower friction but less protection. For high-speed applications, non-contact seals are often preferred, while harsh environments typically require contact seals. Industrial standards like ISO 6194-1 and DIN 3760 define seal dimensions and tolerances.