Grease

[zoidberg]

No, not the 70s fillum with Olivia N-J, but a boaty q.

The top of my rudder post exits a glassed-in tube with the top bearing dished about 1cm down inside. There's a cover plate that's an 'easy running clearance fit', and I would have one ( or two ) O-rings down in there, on top of some grease.

The question is, what kind of grease? There's no high temperature likely, no sliding - and although rotation, that will be only about 35° port and starboard max. I have lithium grease, and bearing grease, and stuff for squeezing down into sterntubes. Which? Does it matter?

 

[lw395]

Whatever's stickiest perhaps, as it will inevitable work its way down the shaft.

 

[VicS]

. https://www.gruebb.com/controlpanel/shoppics/pdfs/GruebbRamonolAdvancedTDS2016pdf.pdf

 

[Roberto]

. https://www.gruebb.com/controlpanel/shoppics/pdfs/GruebbRamonolAdvancedTDS2016pdf.pdf

thanks. Is there a chemical or industrial specification, number or letters, for the white lythium grease, the one which is yellowish white with a consistency like thick hand cream? The "normal" lythium grease is more translucid and yellow-brown in colour.
Depending on countries and manufacturers, the same product is sold under different names and one is never sure of which one is which...

 

[lw395]

thanks. Is there a chemical or industrial specification, number or letters, for the white lythium grease, the one which is yellowish white with a consistency like thick hand cream? The "normal" lythium grease is more translucid and yellow-brown in colour.
Depending on countries and manufacturers, the same product is sold under different names and one is never sure of which one is which...

Could be anything. Margarine perhaps?

 

[Deleted member 36384]

KY, requires frequent topping up.

 

[PaulRainbow]

. https://www.gruebb.com/controlpanel/shoppics/pdfs/GruebbRamonolAdvancedTDS2016pdf.pdf

:encouragement: Beat me to it

 

[zoidberg]

Thanks for that. So, I can safely ignore a prominent sheep farmer's home-brewed concoction of natural lanolin.....

 

[VicS]

KY, requires frequent topping up.

Thanks for that. So, I can safely ignore a prominent sheep farmer's home-brewed concoction of natural lanolin.....

No comment!

 

[thinwater]

Actually, a lanolin-based product like Forespar Lanicote is probably several times more water resistant that lithium grease.

 

[RichardS]

No, not the 70s fillum with Olivia N-J, but a boaty q.

The top of my rudder post exits a glassed-in tube with the top bearing dished about 1cm down inside. There's a cover plate that's an 'easy running clearance fit', and I would have one ( or two ) O-rings down in there, on top of some grease.

The question is, what kind of grease? There's no high temperature likely, no sliding - and although rotation, that will be only about 35° port and starboard max. I have lithium grease, and bearing grease, and stuff for squeezing down into sterntubes. Which? Does it matter?

I use waterproof grease (calcium based waterpump grease) on the top and bottom bearings and on the shaft lip seal of my rudder stock. Only the bottom bearing is permanently underwater, of course, but it seems to last well either below or above the waterline.

I've just bought a new 500g tin because it takes a huge amount to fill both my Flex-O-Folds. :ambivalence:

Richard