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For a two pedestal lathe, at a push I could imagine 2 levels, perp to the bed at either end of the machine, with a eyes on each looking to sync a min max/number in a millpond, for longer stuff add an alignment scope or taut wire. But guys on radios? Calling to the shop floor?? 😂

Holy hell shipmate, I be thinking the largest truth revealed in that there info be that the lulz are strong with sea goin folk! :LOL:

Ah im just a hobby joe in the machining department, have always had an interest in machining/mechanical engineering tho and love to learn. Metrology and machine reconditioning became the main interest so I started out tearing down a 1930s new to me DSG 13" lathe, was an educational trip that...

I can only imagine (y) Reading through Foundations of Mechanical Accuracy is an experience all by itself for those interested. Also Testing Machine Tools by Georg Schlesinger (the bible), useful for required specs of new tools and various testing methods. Fuzzy PDFs for both usually findable.

True, unless previous hands tossed a few shims in trying to fix one error by introducing another 😅 (sorry, couldn't resist) For those interested, a quick look a Kingway tool loading up with two adjustable vials doing its thing, can indicate from it also making things very convenient.

Its all relative and needs based eh. Turning to tenths over any distance for a living? Repair/setup machine tools for living? Have an interest in machine geometry/reconditioning? Precision levels are high on the list of needs. The must have tool to get the 70yo beater out in the shed with a 30...

For anyone wondering, theres normally not much need for lathes etc to be 'level' with earth. When 'checking level' with regards to a machine tool, folks are usually referring to looking for any meaningful twist in the main slideways, precision bubble levels are ideal for this. All is rubber lol

For the average lathe that needs leveling, id imagine a two collar cutting test and/or indicating from the saddle to a test bar in the headstock socket would be the goto. The machine would be new and checked in all ways from factory, its known good, so set machine in place, bolt down, tweak...

Nice one OP, iirc (0.0005" in 10") is a 10 second level, yours is a bit more sensitive and more than enough to set a machine up and check for wear/twist etc. Used as a comparator you can check point to point for global flatness, across surfaces for twist/coplaner and riding components as a quick...

I love a bridge jack but they can get in the way if its your only option, and depending on setup some lack stroke (8 - 10") which can be a problem if you want clearance enough over the runways to use a high torque or bar bottom arms etc. Nothing that cant be overcome easy enough tho (y)

How about one lift and leave the other side clear, say for long term project or other stuff where you need some space? A mechanic buddy has one of these, single bay and gets on really well with it. Ive done front struts on a mini on it, up on scissors with runways lowered off, easy job. He uses...

nothing to fear but fear itself eh

If youve got the ceiling height, have a think about what sort of work youll be doing and go for it (y)

Love the optionality of wheel cribs, made mine stackable and use odd blocks as required (y)

The cribs I knocked up are stackable so you can vary height, can go under the wheels or body/frame as you need, 3/1 height base ratio is a nice max. Much more stable than stands and all but impossible to slip off. Why? Optionality, comfort, ease of access, room to bar use impacts fully, room to...

thats what my little lifts wanna be when they grow up 😌 (y)

Cheers man, Ive never come across one of those in the uk before.

Not so bad bud, those bolts are partially threaded M12, grade 8 (allegedly 😅). Offset rollers are a normal design but usually tucked away out of sight and mind in a column. Them failing is way down the list of my concerns :ROFLMAO: That electric effort under the van, not so sure that spitting...

Haha yeah, these entry level jacks are rated to 800kg each (£200 each), that bimmer is only about 300kg per corner on the front so they arnt really working that hard. The frames seem beefy enough, but sloppy made, nothing that cant be put right by shimming the uprights but shouldnt have to eh...

Every now an then you get lucky with this stuff, but the pair o china jacks i just bought must have been friday night efforts. The uprights runout about quarter inch at the top causing the carriage to bind even worse than it does at the bottom, and with the jack mechanisms caked in paint and...