Do sealed bearings leak?

Question regarding Sealed Bearings - Practical MachinistDec 22, 2010 — Second question: The bearings will be inside a gearbox with oil. oil leaking from a gearbox through the bearing seals to outside the gearbox 

6 Reasons Bearing Isolators Leak Lubricant | Pumps & SystemsAug 9, 2017 — The most common perception of bearing housing seal failure on to the proper level, bearing isolators will generally stop leaking and return to Sealed or Shielded Bearings? How to Tell the DifferenceThere is a difference between shielded and sealed bearings. You can regrease a shielded bearing, but you should not be regreasing a sealed bearing. Discover 

Sealed Ball Bearings Advantages - The AC Media GroupJun 13, 2016 — But on the other hand, sealed bearings do not require regular lubrication in stopping grease lubrication used in the bearings from leaking out

OK for Sealed Bearings to a leak a bit when new? | Bob Is TheMay 14, 2016 — I noticed that a sealed bearing on a recently installed timing belt idler With time the seal will wear past these imperfections and result in a tight Debunking the myths around bearings - Plant EngineeringJun 11, 2014 — Application Myth #3: Sealed/lubed-for-life bearings will last forever. they may thicken and harden or become thin and leak out of the bearing

Sealed bearing effective as an oil seal? - Practical MachinistJan 26, 2015 — I was wondering if a sealed bearing installed using sealant on the shaft and Also, does an oil filled transmission always need a vent? to use a super cheapo 6204-2RS in the same manner and its leaking grease all overWhat's the best seal design for my bearing applicationJun 29, 2017 — In this case you can see the bearing is open and you can see the leave supply to the bearing inside so it doesn't leak out and we end up 

Sealing solutions give longer life, stop pesky leaks | MachineBy matching a seal to all of these conditions, you can prevent leaks and One way to do this is with two seals, one of which faces the bearing to retain the Should sealed bearings leak? - Bike ForumsJul 30, 2013 — Grease will weep out of these seals. The seals can be lifted out with a thin blade, the bearing can be re-lubed, and the seals pressed back in