Quote:
Originally Posted by sammyg2
LOL now what in the world are you going to use a master machinist's level for that you couldn't use a regular starrett 98 on?
I have one at work and all it does is gather dust.
They are too darned sensative to be accurate unless you jump through all kinds of hoops. Just having the sun hit one side of it will through it 2 grads off.
Gotta use a thick umbrella to keep the sun off it and the part you are measuring for at least a hour.
They sure are cool tho ..... 
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Yeah, it can be quite a challenge to use at time. My little shop is climate controlled and I keep the blinds closed and the a/c set at "meat locker" for at leat a full 24 hours so everything in the shop stabalizes before I use it. The bubble is so sensative that the heat from your hand can throw it off!!
I last used it to set up the ways on my lathe (before turning a test piece) and I have been putting off leveling my mill.
I was actually looking for a no. 98 for regular shop leveling and found this one for sale and just HAD to "rescue" it. It followed me home, I swear it did!