Gimble Bearing Grease? amsoil options

[Johnny248]

So, VP SX drive. As far as greasing the gimble bearing, what is the best option? The manual states to use EP wheel bearing grease for the gimble and u-joints, but does not give any specs. I know that these bearings see high speed use (5000+rpm I think?) But I'm not sure if they see high loads like wheel bearings.

Three options I am looking at in no particular order

I've been using the 5% Moly Polymeric grease in my boats u-joints after i replaced them. I also use it on chassis parts on my vehicles. Even though it is HD grease, Am soil tech said it is excellent for ball joints, tie rods, u-joints. But not wheel bearings. Why is this? Would it really be a problem to use ? It shows good numbers in the Data sheet, even better than the standard auto grease?

Dominator / series 2000 racing grease. I remember reading years ago that this stuff is excellent for bearings. I'm just not sure if it is ideal for something like a boat that gets proper lube once a year

Multi-purpose Amsoil. Seems like a good all around grease with GC rating.

Suggestions? I'd like to stick with the 5% Moly grease mainly because I already use it for other things, I'm just worried about bearing damage ?;

 

[Pablo]

Amsoil Polymeric grease is seriously thick, almost plastic like. Not good for high speed. Works fine in wheel bearing if not super high speed, great for hot, and heavy loads.

 

[Johnny248]

So....what which one would you recommend in this situation?

 

[Pablo]

Does it get wet? What RPM?

GWR or GRG

 

[Johnny248]

Originally Posted By: Pablo
Does it get wet? What RPM?

GWR or GRG


It does not get wet. Basically it is a bearing that is pressed into the transom plate on out drive. The input shaft of the outdrive runs through the bearing into the engine coupler. So what is going on is that you pretty much have the crank shaft spinning the input shaft of the drive unit. The RPMS are 1:1 of what the engine is. So its always changing, and ranges from ~800rpm to 5600rpm. I don't *think* it see the lateral forces that a normal wheel bearing would see since it is not supporting any weight. Here are a couple of pictures. I think the Dominator may be the way to go, however I don't know what its life is like being a racing product.


The Yellow is the bearing. The Red is where the shaft runs into. Through the bearing and into the Red.


The blue shaft is the input shaft of the drive. Runs through and spins inside the bearing.


Looking into the gimble housing.


The bearing itself.

 

[Pablo]

Sounds perfect for the GRG. Very cool.

I've used GRG for years.