Vib Gauge - what is a mil?

[ackattacker]

I thought 1 mil was a measure of angle as in 1 mil is 1/6400 of a circle, like 1 degree is 1/360 of a circle.

It is both. What you're referring to is more appropriate called "angular mil", "mil angle", or "milradian".

But more commonly a mil is 1/1000 of an inch.

 

[CosCrj]

I know when we balance the CRJ engines we have the machine set up to measure in IPS.

 

[ackattacker]

IPS = Inches Per Second

It is a measure of the velocity of the vibration, which is a function of both amplitude and frequency. It is perhaps a more accurate measure of the total energy. As I said, there are many ways to measure vibration.

 

[727gm]

"milradian"

Not to be confused with milliradian and microradian which are pure angular measurements.

 

[FlyFlyFly]

Stop it guys, this information has now crowded out my gunsafe combination AND my home phone number...