low temperature lead screw grease for Marine enviroment

[kenVTME90]

I have an application for a US Navy project where we need grease for a lead screw with a manganese bronze nut and stainless steel screw.

This is for a ship that will be in salt water spray environment.

We have been using superlube PTFE grease but the starting torques are too high in the cold winter temperatures.

What do you recommend?

thanks

 

[dgallagher]

Possibly...

http://www.reliabilitydirectstore.c...w-Temperature-Bearing-Grease-p/skf-lgwm 1.htm

Dave G.

http://www.ReliabilityDirectStore.com

 

[unclesyd]

Here is one, LE 1299, we use on fishing boats for all seasons. This grease is also used in ice plants at waters edge.
If you look at the data sheet for this product it will give you information on specific tests a lubricant matching your specifications should meet.

http://www.le-inc.com/products.jsp?productID=235

 

[coatingengineer]

Hi,

PTFE can surely cold flow under higher load. Generally, depending on its thickness, and the structural support offered from the base metal beneath, 8,000-10,000 PSI is a good rule of thumb.

Have you considered dry film lubricants? Depending on load (i.e. under 50,000 psi) molybdenum disulfide (MoS2)can be an excellent break-out source. In fact, both static and dynamic friction as low as 0.02-0.04 are attainable.

Today, dry film lubricants are integrated in a variety of binders, both for enhanced mechanical and corrosion-resistant properties.

Consider 'Everlube Products'. Many of their dry film lubricants are both military and aerospace certified.

Greases (versus dry film lubricants), in my professional opinion, are just too difficult to maintain.

Good luck!

William Gunnar






William Gunnar

http://www.IndustrialCoatingsWorld.com

 

[unclesyd]

You might want to take a look at the Nye products and give them a call.

http://www.nyelubricants.com/lubenotes/LN_Ball_Lead_Scrws-04-2.pdf