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    It refers to the heat-treated condition, 'T'...

    It refers to the heat-treated condition, 'T' being the commonly stocked version of 4140.

    Lots of specific info on heat treating it here...
    4140 High Tensile Steel - Interlloy
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    martrix, I have a circular dropout of 25mm 304 SS...

    martrix, I have a circular dropout of 25mm 304 SS plate that's about 78mm in diameter.
    It was cut with a waterjet and weighs 952g.

    If it's too big for your chuck, I can turn a step on it down...
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    Our local Supercheap had Tellus46 @ $100 for 20L,...

    Our local Supercheap had Tellus46 @ $100 for 20L, which I thought was reasonable... and handy when chasing things on the weekend.

    I don't even consider Blackwoods these days. Their buying power...
  4. What sort of experience do you have already Com...

    What sort of experience do you have already Com VC?
    You might be able to get a start operating a profile-cutter, laser, or waterjet.
    It's mainly 2D, but probably a good place to start before you...
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    Walkers in Maryborough (QLD) had equipment of...

    Walkers in Maryborough (QLD) had equipment of similar proportions to those in the Doxford workshops. Maybe not lathes quite as big as that one with the crank in it! ..but certainly some very large...
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