Sounds interesting DW, are you going to detail the compressor build one here
You can't use a flat top/bottomed tank, The vessel has to be a sphere, or two domed halves. or a cylinder with dished ends.
Maybe? dunno.
I'm looking for a 100ltr oil drom or barrel? I remember my first job on leaving school and it was in a soft drinks factory and throughout the day I had various task to do besides stacking full crates of lemo.
One of the task was to empty the broken bottle bins and they would have been ideal for a reciever tank,problem is I don't know where those drums/bins came from I'm guessing they might have come from a machine shop at the back of the factory I worked but no idea whether they where oil drums or some sort of agent? originally in them.
They was like 205l oil drums but smaller circumference without the ribs on the drum,they also had sealable lids.
Anyone got an idea? scoured the net for oil drums but alls its throwing up is the standard 205l 45gallon type.
For a moment there, I was worring about Darwin and you.
I understand that bit, but why are there so many options for tool height, ie. 8mm, 10mm, 12mm etc. When mine must be closing on 25mm. To what does the tool height dimension refer, also is it assumed all tooling is square in section? Therefore 12mm for instance is a 12mm square section.
Tip for an accurate always present viewable centre height .
After taking a couple of hours or so to pack the lathe solid and align the centres I used the face plate and the tailstock with a pair of brand new precision ground centres & dog to turn a 9 inch long test bar ( or three ) to see what the run out was like by rolling it around on a piece of float made plate shop window glass ( it's about as flat I can afford ) trying to get a 0.0005 feeler blade under it at various points . ,
I had to move the tail stock gib screws a smidgeon to get it right , but now having proved it know my lathe is aligned and clamped solid ,so I should be able to do some reasonably accurate work .
Turn a piece of bright steel bar with it close to the chuck to a thin stub to get dead centre .. I got mine down to less than a sowing box pin diameter after about the fourth attempt at packing up the tool ,
Once you have got this height stop the lathe , it is a simple case of bring the cross slide back away from the work , traverse the carriage to the tailstock ( watch out for the clamp lever arm ) don't loosen th tool post
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Then at the chuck end of the tailstock ram gently scratch the now proven accurate centre height on to it using the cutting edge tool to scratch the barrel side in one thin line . Rub a bit of engineers blue in the scratch to enhance it .
You can now easily set the centre height for any tool you use very quickly by referencing back to the scribed tailstock mark by packing if needed .
T
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if u want to find the center height of your tool use one of these and set it from your tailstock center . then when tool set face across a piece of metal and u should end up with a pip that will fall off if u have set correctly . if u have nothing better to do or make one of these ive made both 30 years ago at night school or u could just buy one
Would not the height on the tailstock ram alter in height depending on how loose or tight you lock the tailstock? probably only a smidgen of discrepencie but by how much?
Thats the type of height tool I was using in the EE however the center height was taken from a piece of stock,turned,parted off then the parted off piece was put back in the chuck centered then a face cut was done and a very small pilot hole drilled and then the height tool was aligned with the pilot hole ie the tapered tip on height adjuster was fitted into the taper of the pilot hole for accurate center,job done,then it was just a case putting the height tool on the bed everytime the tool needed adjusting.
Yours it a bit crude but that is basically the be all and end all of tool centering for accuracy,amazing the lengths some lathe turners go to with all these fangled gadgets which require a lot of faffing about,you tube is full of silly gadgets when that simple tool you have shown is the best way.
Mines on a magnetic base.