Reducing breakaway torque and friction heavy lube

[CITYSLICKER]

purely a theoretical question .

Suppose a synthetic base oil with GL additives showed :

40 degrees C .......... cst above 7000 ( not a typo )
100 degrees C .......... cst above 300 ( not a typo )

pour point of 5 degrees F

Density of .897

Suppose your goal was to retain as much of the EP/AW protection of the original product as possible ,
while reducing the breakaway torque as much as possible .

At the same time total viscosity needs to be reduced appx. 40-50%

You know , the high film strength , low parasitic drag , holy grail of lube ...

Slicker than snot , tougher than nails , and all that .

Am I correct in calling these " Friction modifiers " ?

Honestly I'm a little confused on the whole friction modifiers issue ,
ATF vs. LSD FM chemistry being completely different ?

Enlightenment appreciated , what have I missed ?

 

[bruce381]

start with a 0 grade bentone grease.
made with low vis PAO for a low breakaway torque or alow vis base oil star away from high vis oils they are to "sticky" use a low vis oil and ahigh amount of thickener bentone or silica.
bruce

 

[bruce381]

40 degrees C .......... cst above 7000 ( not a typo )
100 degrees C .......... cst above 300 ( not a typo )

At the same time total viscosity needs to be reduced appx. 40-50%

thin with kerosense or such
bruce

 

[bruce381]

""ATF vs. LSD FM chemistry being completely different ?""

Not a good FM for gun use in slow moving, low heat, low pressure applications stick with Fatty oils or sulfurized fatty oils
or phosphoric esters etc
bruce

 

[bruce381]

paratac will not add much to the drag and will help with run off

stay away from resins and wax to sticky as in glue

pick a good AW system (sulfur fatty) and then build up body with gelling additives to consistancy you like. lube has to stay put to do anything and a lousy lube thats stays put is better than one that washes or runs off after a few hours unless you want to re apply all the time depends on what you want to do.

 

[bruce381]

I use a bentone gelled PAO of low vis gives LOW breakaway torque (there is a bearing test for that)

Then use a low temp activated Friction modifier as in lowers friction

 

[bruce381]

BUT high vis PIB or PAO will be way to sticky and cause very high "DRAG"

 

[CITYSLICKER]

Seems I was headed in the wrong direction ...
Thicken the thin stuff , not thin the thick stuff .

Would sulfer ester be an example of the low temp FM mentioned above ?

Thanks for the advice !

 

[bruce381]

yes

 

[bruce381]

call me california time tuesday

 

[CITYSLICKER]

Will do !

 

[Tempest]

I thought sulphurized esters were AW? I need to learn more...