Just been having a play around with a very sensitive Mitutoyo dti - the swing type not plunger. It is calibrated in 0.0005" markings.
On the 14" 4 jaw chuck outside body I am getting runout of about 2 graduations. I assume that is 1 thou?
I turned a short piece of steel down - now about 3/4" diameter. I am getting no measurable runout at all. The needle is barely moving. Is this normal - is my lathe very accurate - or am I not checking the right things?
The photo is just to show the type of dial I am using.
On the 14" 4 jaw chuck outside body I am getting runout of about 2 graduations. I assume that is 1 thou?
I turned a short piece of steel down - now about 3/4" diameter. I am getting no measurable runout at all. The needle is barely moving. Is this normal - is my lathe very accurate - or am I not checking the right things?
The photo is just to show the type of dial I am using.