Moly coating on bed ways of lathes and HBM 1

[sacem1]

I have been offered a spray containing a solution of molibdenum bisulfide that creates a fine layer of dry moly coating on top of the bedways in lathes, milling machines and horizontal boring machines.

You wipe the surface completely clean, spray the product and after a few minutes a dry dark film is covering the bedways, they claim that you will not need further lubrication, or you can use little of it, it should also inhibit corrosion on bedways and protect them from abrasion even without additional oil application.

The product is called DRY PLUS AEROSOL from NCH CORP in the states but manufactured in Mexico by a subsidiary company.

Does any one have had an opportunity to use this product or a similar one, I have really long bedways that only occasionally get used so protecting them without having to periodically apply oil to them would be practical, but I do not want to jump to this use with out further opinions, their information or leaflets leave a lot to your imagination.

Regards

SACEM1

 

[unclesyd]

Be careful of claims and inflated prices. There are many aerosol Moly products out there.

I would be leery of just using a boundary layer lubricant. Here is another lubricant that is carried in a Paraffinic base oil. The Paraffinic base oil is need for moisture resistance.
There are several way lubrication products that contain Moly on the market,

http://www.schaefferoil.com/160_slide_way.html

 

[sacem1]

I know of several products with moly here in our local market also, the difference with this particular product is that when applied it leaves a completly DRY surface wich does not even tint your hands when you touch or rub the surface once dry, that is why I am wary of the lubricating effect on the sliding surfaces, can this be really effectve? I am open to any other experiences with this DRY film (suposedly) lubricating film layers.
Regards
SACEM1

 

[unclesyd]

The product you are inquiring about isn't unique in the world of MoS2 lubricant coatings. I would say the majority of the industrial MoS2 aerosol coatings are made to and will dry tack free and clean to the touch.

We use MoS2 as a lubricant in many forms and in very diverse applications. It is the film of MoS2 that provides the lubrication no matter how it's applied. We used it as a very thin film or in grease or oil carrier. We have some that require heat curing while others the carrier evaporates and leaves a film as you describe. In theory all you have to have a monomolecular layer of MoS2 to be effective as a lubricant. You use a very thin film of MoS2 where there is a minimal amount of movement between components. In your case the thin film will slowly wear away with use and will have to be replenished periodically. Where you have a lot of movement you have to use an oil or grease carrier to replenish the MoS2 at the sliding interface.

Here the daddy of the MoS2 websites, Molykote by Dow Coring

http://www.dowcorning.com/content/molykote/molykoteind/default.asp

Here are three Dow products that we use everyday.

Molykote 321;106;D 3484

http://www2.dowcorning.com/DataFiles/090007c880037ff0.pdf

http://www2.dowcorning.com/DataFiles/090007c880002d3a.pdf

http://www2.dowcorning.com/DataFiles/090007c880002c84.pdf