Originally Posted by beamishken
Sorry but that may be correct for the hubs currently fitted but if he uses the hubs in the link then the shaft doesn't matter as the seal is fixed to the inner race & seals on the hub.
Totally different set up to origional hence he needs to carefully Check shaft diameter & stub length
If those hubs in the link fit then future bearings will be cheap as chips so it's worth investigating
Sorry, but that is backwards. The sealed bearings he currently has are sealed to the races, both inner and outer. A traditional tapered bearing has the inner seal against the spindle at the raised part, and the outer side is mounted into the hub. I will provide pictures. Please feel free to share a few photos proving me wrong otherwise. If you have ever worked on a typical car front end on rear wheel drive, or the rear on a front wheel drive, then you will understand how the different trailer bearing setup works.
Some good info on...
"Seal Saver System ; There is one thing that is worthwhile to consider installing also. This is called a Spindle Seal Service kit, and is made by Bearing Buddy. It is a thin stainless steel hollow cup with a hole the size of the spindle shaft on one end, and the other is just large enough to slip over the seal surface of the spindle. There is a small neoprene O Ring that goes between the inner lip and the saver. The inner bearing puts pressure against the saver and compresses the O Ring to keep water from coming in under the saver. What this does is give the seal a better surface to seal against. It being stainless, it will not rust or get pitted like the regular steel spindle, which can chew a new seal up. Being thin, it however does increase the shaft dia., requiring Bearing Buddy's own special seal.
2 - Trailer Axle Spindle Seal Repair Sleeve Kit Upgrade 2000# Axel 1.98 OD | R and P Carriages
What this was apparently designed for was, if you had bearing failure and the spindle got chewed up at the seal area, you could save the axle by simply adding this simple device. However it this persons opinion that these units should also be installed as a preventative measure at the same time as new bearings and seals are installed, especially if your trailer is more than a few years old and you use it in salt water.
One thing about the design and or that the instructions don't mention is that I have found that the neoprene O Ring sometimes does not seal out water from coming in behind and under the saver sleeve. It is my suggestion that at the time you install the sleeve, that you coat the spindle at the old seal and shoulder area with heavy chassis grease or a silicone gasket sealer. Then when the spindle nut tightens the bearings against the shoulder, this grease will act as an added sealant.
Replacement seals for Bearing Buddy can be purchased direct from Bearing Buddy for $1.75 each, plus shipping They will take orders by e-mail and credit card."
As you can see the seal rides on the raised part. The inner bearing slides over towards the raised part more. It is a tapered spindle but the function is the exact same.
This is the style of sealed bearing the OP currently has (Although I can't see the type of bearing inside). You can clearly see the inner and outer races, within the hub, in the photo by the OP.
OP I just gave you enough information to make an informed decision as to your purchase of hubs.