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Type: Posts; User: taiwanluthiers

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  1. Replies
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    Ok, I think I'm getting the hang of this. I...

    Ok, I think I'm getting the hang of this.

    I got some fairly thick steel, probably almost 1/4" thick and I couldn't weld it even with the biggest tip (the 150) I got. I think according to the chart...
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    Yea, that was my problem, set the oxygen at 60psi...

    Yea, that was my problem, set the oxygen at 60psi and was wondering why 1. was going through oxygen VERY fast, and 2. was blowing holes even in thick metal rods...

    I learned my lesson there......
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    Thanks for clearing up the confusion. So...

    Thanks for clearing up the confusion.

    So looks like I should be barely using oxygen when welding/brazing, and using oxygen basically at the same rate as acetylene... meaning cylinders should last...
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    One more thing, is there a chart on orifice...

    One more thing, is there a chart on orifice diameter for torch tips, and what psi should I set the gases to?

    In the whole process of learning I am burning through oxygen like crazy. I am using a 5...
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    Yea I tried to weld bandsaw blades... I kept...

    Yea I tried to weld bandsaw blades... I kept burning holes through the band (it was practice on a dull blade). So I tried brazing and it worked beautifully, though the flux took higher heat than I...
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    I changed the tip. I also found a cheap auto...

    I changed the tip. I also found a cheap auto darkening welding goggle but when it darkens it was too dark for me to see anything (at the light setting, 3, it was actually good enough to kill the...
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    Hole size is about .035 (maybe a little larger,...

    Hole size is about .035 (maybe a little larger, the wire I measured goes in easily).

    The torch has adjustments for oxygen and acetylene, the knob for acetylene is hidden behind the torch.
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    267171267172 So on the torch pic the one on...

    267171267172

    So on the torch pic the one on top is a welding torch, and the one in the bottom is a cutting torch, both made in Japan I believe.

    The cutting torch does not have a lever to...
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    it was a 1.5 mm thick piece of scrap steel

    it was a 1.5 mm thick piece of scrap steel
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    Tried that, it ends up making the steel heat up...

    Tried that, it ends up making the steel heat up slower, so it doesn't work.
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    I'm sure it's pure acetylene. It says so on the...

    I'm sure it's pure acetylene. It says so on the bottle. But then gas welding seems to have fallen out of fashion because people prefer TIG these days.

    Plus I was able to make some good welds, it's...
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    Torch tip size here is not the same as the US. ...

    Torch tip size here is not the same as the US.

    In Taiwan torch tip size is 50, 75, 100, 150, 175, 200, etc., not 000, 00, 0, 1, 2, 3, etc.

    I do not know how that translates but I was given 150...
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    oxy acetylene torch beginner

    I just got myself an oxy acetylene torch setup.

    I have been trying to weld but for some reason I can't get a weld puddle started. As in by the time I get to the point where there is a puddle the...
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    I've seen someone sell a gasoline blowtorch......

    I've seen someone sell a gasoline blowtorch... claiming it's a lot cheaper to maintain than acetylene. Any dangers to gasoline torch?
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    It had something to do with the guy wanting to...

    It had something to do with the guy wanting to use SF express, and that SF express will NOT accept any powdered substance of any kind. And the guy will only use SF express, not anyone else (not sure...
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    I'm using a propane torch for this, and it takes...

    I'm using a propane torch for this, and it takes a good minute or so to get it up to temp... I'm wondering if that caused some difficulties with borax.

    I'm not really wanting to use acetylene...
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    black brazing flux

    Is it possible to make this stuff, what exactly is it made of?

    I tried to buy some stay-silv black flux but it must have a hazardous material classification because no one will ship the stuff. But...
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    Sorry but I forgot what a DH is... is that slang...

    Sorry but I forgot what a DH is... is that slang for a rotary table?

    I found a set of reverse jaws on Aliexpress for around 25 dollars. The dimensions appear to be consistent.

    How does soft...
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    If the cutting edge is too many, what about...

    If the cutting edge is too many, what about removing a few inserts to reduce its cutting edge and therefore HP requirement?
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    Replacement 3 jaw chuck jaws

    I bought a Vertex 6" Rotary Table that came with a 5" 3 jaw chuck.

    Unfortunately it didn't come with any reverse jaws which is a bummer because I need to grab bigger stuff (for making bolt hole...
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    power feed for large mills...

    It seems almost all power feeds on the market is intended for Bridgeport Series 1 machines.

    Do they make power feed for larger machines, like Lagun FTV-4 sized machines or larger?

    I just added...
  22. Yea, the guy seems not very good at manual...

    Yea, the guy seems not very good at manual machining at all. He doesn't even know how to grind drill bits by hand (I do it for him quite often because he would throw them out once they're dull, or...
  23. You guys are tough on newcomers for sure... I...

    You guys are tough on newcomers for sure... I guess you want to discourage people from wanting to machine for a living.

    On the other hand some of you said don't waste your time grinding HSS flats,...
  24. It's not that I can't operate a lathe but I guess...

    It's not that I can't operate a lathe but I guess the guy had to be somewhere and didn't want me taking all day to do it. But the way he's really doing it is pushing the machine, and you have to know...
  25. I'll be honest with you though, the guy did some...

    I'll be honest with you though, the guy did some stuff on the lathe that makes me scared.

    For example, he would face the cut (before the shaft) by REALLY PRESSING INTO THE WORK with the flat of...
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