redunshee
Addicted to ArboristSite
Get the double lip seals from SKF which are SKF 6119. The 6120 (single lip) and the Nationals 253747 (double lip) have the garter spring as well. Often the pics of the seals are a generic pic and not the one you re buying..
The extra lip on most double lip seals are just a dust exclusion lip. The inner lip is the sealing lip. Both work well but you might as well have the extra help to keep sawdust out.
Just looked up the Skf 6119 and it says it has no spring per Skf website.