How thick gear oil with SAE 250W is?

[Howe]

I'm curious about the viscosity of gear oil with SAE 250W or ISO VG 680 and greater is? Do you have any illustrations for that?

 

[ctechbob]

 

[RDY4WAR]

An SAE 250 gear oil is 41+ cSt @ 100°C and ~500+ cSt @ 40°C.

 

[Howe]

thank you, I'm aware of that chart. as for comparison, is it as thick as heavy syrup?

 

[930.engineering]

Below freezing, yes.

 

[Gyro Gearloose]

We used ISO 460 gear oil at work for a slow speed reciprocating pump gear box. At room temperature it was very similar to pouring molasses.

 

[billt460]

thank you, I'm aware of that chart. as for comparison, is it as thick as heavy syrup?

This stuff would be supposedly over twice as thick. (SAE 250W vs. SAE 600W). And I would say it's about as thick as honey at 50 F. Perhaps slightly less.

 

[mrsilv04]

Yep. Next door neighbor's Model A uses 600 weight gear oil.

 

[Howe]

thanks a lot for your help everyone! i really appreciate that