prechermike wrote on 06/16/09 at 05:02:58:I measured the depth of the gouge with this:
http://c1.ac-images.myspacecdn.com/images02/94/l_e9e339f08cd74be88545e9ea5287...And there was really no diference, the way I measured it. I tried a couple of ways, to see if there was a difference, but didn't find any.
By the way, does anyone know what that thing really is? It belonged to my father in law, says "No. 513 Pratt & Whitney Made in USA" and is marked with many measurements. You screw the handle down and a rod comes out the bottom, to measure depth I guess. He had ALOT of tools that I have no idea what they are.
That's a depth micrometer
micrometer is a term applied to many measuring instruments with those type of markings.
The knob at the top more or less spins with a little friction. This allows someone without the correct feel to make accurate measurements as the big knob is direct drive and a doofus could get any measurement he wanted.
The tip can have various shapes depending on use
Pratt & whitney is a big aircraft company now, but there were many mfr's of these kinds of tools, wouldn't doubt that's how P&W got it's start.