Viscosity Determination

[MolaKule]

This question is not open to ANY Engineering Discipline or to Tribologists, so other members have an opportunity to answer the question.


In a machine system, the 40C viscosity for a lubricant can be determined by:

V40 = 7000/SQRT(VL), where VL is the "Pitch Line Velocity" in feet/minute.


Identify the machine system. [E.g., engine, hydraulic, gear, etc.]

 

[cb_13]

Pitch line velocity makes me think hydraulic steering rack.

 

[cb_13]

More specifically the steering rack itself.

 

[CR94]

Omissions of seemingly necessary factors makes that equation interesting---and hints at the purpose of the machine!

 

[MolaKule]

In a machine system, the 40C viscosity for a lubricant can be determined by:

V40 = 7000/SQRT(VL), where VL is the "Pitch Line Velocity" in feet/minute.


Identify the machine system. [E.g., engine, hydraulic, gear, etc.]


Any Googling: "Pitch Line Velocity" should be able to find the answer.

 

[1JZ_E46]

Gears, such as in a manual transmission?

 

[Shannow]

Not me...hands in pocketses as per instruction.

 

[MolaKule]

Originally Posted By: 1JZ_E46
Gears, such as in a manual transmission?



You've got it!

As seen here,

Spur Gear Design


Pitch Line Velocity is a factor in the design of Gear Trains, so the system would be Gear Systems.


So 1JZ_E46 wins the coveted virtual BITOG Cup with a virtual quart of low NOACK, FUll Synthetic oil!

 

[1JZ_E46]

Thanks Mola! I was in need of a quart to top up my oil-eating bimmer!