Operating Pressures For Air Scribe?

[jgcox]

Today I received my new Chicago pneumatic 9361 air scribe, however the instructions gave no operating pressures. What pressures are best?

[wibrown]

I believe most air tools are designed to be run at 90psi.

[Terry Dactyll]

I run mine at around 90 psi... You can slow the speed of the pen for finer work maintaining the same pressure...

[jgcox]

Thanks

[DLB]

They say to use around 90psi but closer to 100psi works better for hard rock! Paleotools recommends also to use at around 100psi.