Measuring tools

Don't spend money on measuring tools yet.

Instead, spend some time and effort learning the fundamentals of machining -- if at all possible take a basic class at a trade school or junior college, otherwise ask around in your circles of friends and aquaintances (sp?) and see if you can find someone with the knowledge and tools to give you a few hands-on measurement lessons.

Here in my part of California, the first "Machine Technology" class at a junior college will meet twice a week for three hours a night. If you take only the first-semester class -- which takes about four months to complete -- you'll almost certainly learn the fundamentals of precision measurement, operating a drill press, an engine lathe, and maybe get into the milling machine.

I'll guarantee you this: If you have a flair for machine work, you'll look at the whole world from a different perspective after completing that one class.

Then you'll be able to answer your own question!

John

Not enough precision for rebuilding, but handy for go/no-go tests and parts ordering. You can find out quickly whether your crank has already been reground, the pistons are over-sized, how thick that chunk of steel plate is at the back of the shop, etc. And if you lose the thing it's no big deal.

For a little more money, you can step up to a stainless steel dial caliper good for .001 inches accuracy.

Good luck with your project!