Help with Base oil viscosity on grease

[sid_raptor]

hi all
can someone explain me the units of Base oil viscosity of grease?
for example is there a difference between grease rated at 200cSt and 200 mm2/s
if so then what is the meaning of cSt and what does it stand for?

thanks

 

[AlephZero]

They are the same units for kinematic viscosity. The unit of viscosity in the centimeter-gram-second system was called the Stokes (after the physicist who first studied it, discovered Stokes' Law, etc).

1 Stokes = 1 cm2/sec
1 centistoke = 1/100 Stokes = 1 mm2/sec

The SI unit for kinematic viscosity doesn't have any special name.

FWIW the kinematic viscosity of water at about 20C is 1 mm^2/sec, which may explain why values are usually given in mm^2/sec not m^2/sec (which is the basic SI unit).

 

[sid_raptor]

so cSt is centistokes then? lol why did i not think of that!
thanks for your help mate! much appreciated!