Enduro Bearings Enduro 5 Bearings - MR 18307 Llb

LLB
LLB is a low contact type seal. LLB seals have 2 sealing lips on each seal which also fit into a matching groove on the inner race to make a type labrynth seal. The outer sealing lip repels dirt and water while the inner sealing lip retains the grease. When the bearing is first turned, you will notice some grease will come out of the seals. More on that later about grease but what this does is fill the chamber between these 2 sealing lips forming a hydromatic seal of grease.