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Type: Posts; User: jhovel

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  1. Replies
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    Its not suitable - as mentioned already. The...

    Its not suitable - as mentioned already.
    The windings will overheat within minutes and the bearings (bushes) within hours.
    Get a motor made for bicycles from AliExpress with suitable speed...
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    631

    or you could get some "wood cleaner" that...

    or you could get some "wood cleaner" that contains oxalix acid. It will return the timer part back to the original colour and should dissolve at least some of the rust. You can then fine sand the...
  3. "I would however, be interested to know your...

    "I would however, be interested to know your version of the translation on this:"
    the translation is:
    "Do not change from the '0' position until blade has come to a full stop"
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    Typical spot welder put out 1000 to 1500A to spot...

    Typical spot welder put out 1000 to 1500A to spot weld stuff.... just to give the comparison some scale. At about 2 to 4V open circuit.
  5. That is one ripper of a machine! "Kölle" is the...

    That is one ripper of a machine! "Kölle" is the name of the city (Köln=Cologne) in dialect spelling where I grew up. They made lots of machine tools there.
    If you need any further assistance with...
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    Back a few decades, pretty well all gutters and...

    Back a few decades, pretty well all gutters and downpipes were galvanised and all soldered. May are still perfectly OK even now. So certainly a good way of maintaining rust protecting and...
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    872

    Sectional garage doors have a wound spring that...

    Sectional garage doors have a wound spring that is actually used as a torsion spring to progressively carry the door weight. Your principle works, but as others have said, its already in use....
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    The whole purpose of toughening glass is to...

    The whole purpose of toughening glass is to provide sufficient and even internal stress to ensure small fragment failure (so shards are small enough not to cut people). A byproduct is that the glass...
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    2,421

    Why are there so many black sooty areas? Are you...

    Why are there so many black sooty areas? Are you doing this outside in the wind? Anywhere there is black, you can't be certain that it its sealed.
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    Good luck with the repairs! My Douglas didn't...

    Good luck with the repairs! My Douglas didn't have a gear change, it used speed V-belts. So it not a copy, but maybe a partial adaptation. Have fun with it!
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    2,421

    I bet the crack at 12o clock was where the slow...

    I bet the crack at 12o clock was where the slow leak is. That will continue to crack unless you TIG weld all of it.
    You'll need to clean the weld a lot more than that to have real success.
  12. Nice find! What's wrong with the wheels you...

    Nice find!
    What's wrong with the wheels you have? Can't you just dress them with a diamond point and use them? Or are they cracked?
  13. Not surprised it hasn't sold at that price....

    Not surprised it hasn't sold at that price....
  14. I should have mentioned the high end technology...

    I should have mentioned the high end technology that got me sucked in to get one: I had a complex shape scanned a couple of years ago on a $21,000 (then) hand-held scanner. Some model of "EinScan". ...
  15. Some months ago I ended up purchasing a 3D Maker...

    Some months ago I ended up purchasing a 3D Maker Pro 'Mole'.
    I played with it but not used it in ernest. It doesn't work as easily as in the ads, but some things are easy to scan, clean up and...
  16. Replies
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    2,742

    Remember the island that blew up, Krakatoa? The...

    Remember the island that blew up, Krakatoa? The mnemonic "SOHCAHTOA" rhymes with it. That's how I remember the relationship between Sin Cos and Tan.... :)
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    1,141

    Enjoy! Travel might just suit you better than...

    Enjoy!
    Travel might just suit you better than you think!
  18. That's a good old-fashioned Scythe sharpening...

    That's a good old-fashioned Scythe sharpening stone. It's most likely aluminium oxide or a natural stone abrasive. I remember when I was a kid in Germany, farmers used to have one of those in a cow...
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    2,742

    Just my 2 cents' worth for you: I worked as a...

    Just my 2 cents' worth for you:
    I worked as a competent draftsman (on a drawing machine) in fabrication and architecture in the 70s and 80s.
    I had attempted to teach myself CAD and modelling...
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    2,620

    Seems like you have issues with your "regular"...

    Seems like you have issues with your "regular" water pressures in the UK or the size of your pipes
    We've never heard of shower pumps is Australia - and I have never heard of them in Europe either....
  21. Having used and owned all three variants commonly...

    Having used and owned all three variants commonly misused for tasks outside their dedicated designs, CNC router, CNC engravers and CNC mills, the work "misuse" is definitive.
    Their designs - in...
  22. I've been waiting for commercialisation of Sodium...

    I've been waiting for commercialisation of Sodium ion batteries for a few years. They are here now! And already at the same point as lithium ion batteries!
    So the risk of thermal runaway incidents...
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    All payments by PayPal to "Friends and family"...

    All payments by PayPal to "Friends and family" with a PayPal account are free.... any amount, anywhere in the world. You do lose the PayPal protection if you are paying for goods or service like...
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    Wire aluminium spray won't look very good at all...

    Wire aluminium spray won't look very good at all mate. It is a very course rough surface If you file or sand it, there is a good chance that you open up porosities in the process, which will let...
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    Hi John. Are these stops purely for stopping in...

    Hi John.
    Are these stops purely for stopping in hand-feed operations? I would like to build one that knocks the leadscrew out gear when it hits the stop.
    I've seen a couple of implementations, but...
  26. Replies
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    He did indeed! He checked mine and found it to be...

    He did indeed! He checked mine and found it to be in excellent condition.
    He's in Shepparton.
  27. I've got a little bit of Deltonite left. I can't...

    I've got a little bit of Deltonite left. I can't find it any more. It is/was a passivated phosphoric acid that was thinned with water 1:6. It stings mildly in scratches and cuts, but other than that...
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    As others have said: stay away from gal steel!...

    As others have said: stay away from gal steel! Plant nutrients at any concentration will dissolve the zinc which is toxic to plants (a heavy metal!) and then you feed iron oxide to your plants which...
  29. I second the noise cancelling headphones. I had a...

    I second the noise cancelling headphones. I had a reasonably cheap set that used to scare me because I couldn't hear the engine in my plane any more - AT ALL. I took to humming, which it cancelled...
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    Pity, very unfortunate videography.... they could...

    Pity, very unfortunate videography.... they could have at least showed on spot drilling process each without coolant....
  31. Replies
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    2,253

    If it was made from toolsteel, then you can just...

    If it was made from toolsteel, then you can just reharden it by heating to orange colour, then dropping it into ambient oil or water (use oil if you don;t know if it was oil or water hardening tool...
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    Can you clean the original nozzle and take a...

    Can you clean the original nozzle and take a close-up photo? Most have a threaded adjustment to tighten and loosen their grip. May just need a little twist to loosen to get off or a little adjustment.
  33. Replies
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    I can't quite figure out what you are asking. If...

    I can't quite figure out what you are asking.
    If you tempered the end to drill it, why do you want to retemper it?
    What do you want to use the potash for? It's typically used for blackening.......
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    Here is the next generation of these:...

    Here is the next generation of these:
    https://www.youtube.com/watch?v=aDXvyRd3JY4
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    The Kalgoorlie person hasn't got any spares that...

    The Kalgoorlie person hasn't got any spares that you could find out about? He would be using 20 of them for 24 V.... no idea how I would get them back here, except coming to get them (not out of the...
  36. Replies
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    That person knew what he was talking about. The...

    That person knew what he was talking about. The batteries in Voyager 2 are still working and are now 50 years in space....
    Mine are guaranteed by Saft for 20 years. And "reconditioning" is in fact...
  37. Replies
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    I will need 5 of them. $2675 plus freight (nobody...

    I will need 5 of them. $2675 plus freight (nobody will freight 150kg of batteries with electrolyte in them, btw).... not going to happen.

    I got a quote from Saft, by the way: $1800 each cell x 5...
  38. Replies
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    Hi. Thanks for the info. I had heard that the...

    Hi. Thanks for the info. I had heard that the Telstra used them, but like Nigel, I've never seen them used anywhere before. So maybe the info I got was from SA or NT.
    What were they never...
  39. Replies
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    CNC 60 years ago

    https://youtu.be/TnsKj1Hwf7o

    The correct title would of course be "NC" since there are no computers involved.... that came 10 or more years later, when the depth stop setting was eliminated as...
  40. Replies
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    Wanted: vented large Nickel Cadmium Cells

    I'm looking for at least 5 large 625Ah or so Nickel Cadmium Cells. These have liquid electrolyte, not dry cells!
    They are used in large stand- y power setups by telcos, hospitals and airports.
    They...
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    Lots of industrial YouTube demonstrations out...

    Lots of industrial YouTube demonstrations out now. Lots of safety protocols and interlocks required but the process seems relatively straightforward.
    The main difference to MIG is that the Laser is...
  42. Thread: Nickel supplier

    by jhovel
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    2,958

    as kafie says, I doubt anyone here is still...

    as kafie says, I doubt anyone here is still looking for nickel 7 years on.... Australia produces nickel, by the way, just try Townsville nickel....
  43. Thread: Biax

    by jhovel
    Replies
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    1,722

    A half-moon scraper is actually much easier to...

    A half-moon scraper is actually much easier to build than an adjustable straight line scraper. I simple multi-tool would be a good starting point. The blade only has to wiggle from side to side.
    I...
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    If Microsoft has determined your storage is full,...

    If Microsoft has determined your storage is full, then you ARE indeed on the cloud!
    The only Microsoft mail system NOT in the cloud is Outlook - which you have to buy. Then your harddisk is the...
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    Yes, I agree. I've used a Dillon torch in the...

    Yes, I agree. I've used a Dillon torch in the past. Pretty expensive....
  46. Replies
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    Some years ago I bought myself a jeweler's Smith...

    Some years ago I bought myself a jeweler's Smith oxy torch for just this purpose. It will heat and melt very small areas and cause little distorition. I used it for both fusion welding and...
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    I hope your planning to band or narrow wheels...

    I hope your planning to band or narrow wheels only for off-road or racing use. Banding is TOTALLY prohibited for use on the road in Australia! Some racing categories prohibit it as well.
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    There is always the option to use a DC power...

    There is always the option to use a DC power supply that suits the motor current and make it corded....
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    Why did that last picture builder use the entire...

    Why did that last picture builder use the entire transaxle? Looks silly to me....
  50. They do indeed use a virtual reality welder for...

    They do indeed use a virtual reality welder for training! It is VERY realistic, sound and all. I've used one at an engineering exhibition once and it was amazing! No gas wasted, no burns possible, no...
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