What calibration will the inspector need ?No idea yet.
My preference is for a machine appraiser/tech. I'm expecting someone with precision levels, MT 5 test bar, indicators, etc. I have a very specific set of tests I want done.
From the OP "... with me watching via Facetime."Ok, well I intended to generously offer my time if it was reasonably close, but if you have no idea where it is, and insist on a “machine appraiser/ tech”, I’m out.
I’m not sure what a “precision level” would get you in an inspection???
We know what a Hardinge is capable of if it’s in reasonable condition, one of the most consistent lathes quality wise in fact. Wether it’s level or not where it sits isn’t relevant.
I’d suggest you want a rebuild with a warranty from a reputable shop, not a used machine, to meet your “particular requirements”.
if you expect someone to go and do a full evaluation to factory quality control specs on a used machine, expect to pay over 1k, and good luck finding them. And remember it may get damaged in transit anyway.
PS, if you are actually willing to pay for inspection tools and my time, I’m fully capable of doing that, lol!
with me watching via Facetime.
Yeah, Jim. It's a 5C spindle bore. Just like God intended ;-)
I'm a bit agog that a bunch of "machinists" would not grasp the value of a precision level in a lathe evaluation.
If the bed is level and you place a precision level on the carriage and record the level reading at 1-2" increments of travel you get a pretty good evaluation of the bed wear. A custom gadget such as a King-Way is better, but a level on the carriage trimmed up with feeler gauges is good enough. And as a practical matter a more accurate description of the functional condition of the machine than any other measurement.
For the "level" of the bed there are 2 choices: reference surface or carriage at the extremes of movement. The latter allows warping the bed to provide some wear compensation. Measuring both is thus important.
For a test spindle, a 1" precision ground between centers test bar and a precision 5C collet, tenth test indicator and stand should suffice. Cantilevered from the collet TIR gives a good measure of the state of the bearings. Set between centers a height traverse should match the level results and a horizontal traverse will give the horizontal component. Everything else is alignment.
Run through all the feeds and speeds to check for chipped gears, etc. Turn the handles the full limits of travel by hand noting feel whether loose or tight.
The least expensive option for precision work has long been the level. Gravity has always been pretty reliable from what I've heard. For example, I've never heard of a "gravity storm".
The earth is not stiff enough to resist deformation. If you walk by a sensitive level it will notice the earth around it move under you. You think an HLV is stiffer?