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Primitive but effective machining .

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  • JoeLee
    replied
    They certainly have a good work ethic but with out a doubt are lacking in safety protocols to say the least.
    Like the guy walking around in the foundry wearing sandals while pouring molten brass into molds. But what would you expect when the floor is your work bench ? Primitive to say the least.

    JL............

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  • Beazld
    replied
    How about interrupted thread pipe taps?

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  • Mcgyver
    replied
    Originally posted by plunger View Post
    I watched this video and am in awe as to how primitive but effective.
    they had me at being able to squat like that.

    Remember, brass needs a very sharp cutter. Best to keep separate cutting tools for brass....once a file, tap or end mill etc is used on steel its less effective in brass. Stoning the tap sharp and only used it for brass might work better

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  • deltap
    replied
    Partly dull cutting tools, but I know my lathe won't do it either. Pipe threads take a lot more torque. I start them in the lathe and finish them in a vise with a big tap wrench.

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  • Cenedd
    replied
    Originally posted by plunger View Post
    Can anyone here tell me if they can tap a 1/2 inch bsp thread in a one meter lathe without the brass bar slipping in there three jaw with ease or do you also have issues.[/url]
    I can't give you an exact like-for-like answer but my lathe is probably a similar size and I'm familiar with the thread. Don't often use brass though. I find that for threads that size (or smaller to be honest) the tap starts to spin in the chuck after a couple of turns. Gets it started straight and I can then hand turn it. To be fair I'm holding it by the smooth shank in a drill chuck and a keyless one at that - both of which aren't the most appropriate. Could you stand to drill the initial hole a gnat's larger for lower cutting forces? You can go a fair amount larger before it makes a massive difference to the strength of the thread.

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  • ptjw7uk
    replied
    Casting Brass wearing sandals!! Not for me!

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  • Doc Nickel
    replied
    "Effective" in that it gets the job done... but holy cow, at what cost? I'm pretty sure some OSHA guy somewhere watched that and his eyeballs caught fire.

    Bare, sandaled feet carrying a ladle of molten brass so hot the zinc is boiling out of it in clouds? Not even so much as a dust mask at the buffing stations, open tanks of copper and chromium solutions...

    On the other hand, if those people weren't doing that, they'd be doing something possibly worse, like those guys that break ships.

    I mean, it's a "there but for the grace of god go I" sort of thing, but if it puts food on the table and keeps the family fed...

    Doc.

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  • plunger
    started a topic Primitive but effective machining .

    Primitive but effective machining .

    I am a plumber and often make adaptions to faucets etc. I am limited to my tools because Im normally broke but work around it. I watched this video and am in awe as to how primitive but effective.
    If I have to tap a 1/2 inch bsp thread in a new piece of brass I struggle . I cant hold it tight enough in my three jaw chuck.

    So what I normally do is just single point turn it. Here they are doing it in a bloody drill press. So I have to ask the question. Maybe all these years Ive been struggling with crap taps and dies.
    Can anyone here tell me if they can tap a 1/2 inch bsp thread in a one meter lathe without the brass bar slipping in there three jaw with ease or do you also have issues.The video is very interesting to me.
    I know our local faucet manufacturer use calibrated torque screwdriver sets for putting in the handles and they are very expensive. These guys just use a screwdriver.
    https://www.youtube.com/watch?v=rOmKNmdYgNg
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