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  1. Replies
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    Interesting things for metal workers i have...

    Interesting things for metal workers i have bought from monotaro:

    Compound lever pelican snips
    Specialty screws
    Solid aluminium rivets
    400-1000 grit belt sander belts
    thin diamond angle...
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    Monotaro discounts

    Looks like business under covid is slow. Monotaro has sent me a couple if 15% off everything coupon codes. AUD better than parity with SGD.

    Joined up wife last week and there was a 20% signup...
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    Not 2 weeks, 2 days to ship from Monotaro Japan...

    Not 2 weeks, 2 days to ship from Monotaro Japan to me. 3-5 days usually for Monotaro to pick order is a bit slow.

    2 weeks for royal mail from UK or parcel post from USA.

    Rakuten.jp to...
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    lately the 10% discount voucher codes have been...

    lately the 10% discount voucher codes have been coming weekly for at least 6 weeks. Just placed another order. register on the front page and I think they will send you the voucher codes.
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    monotaro.sg is the English site (as per OP's...

    monotaro.sg is the English site (as per OP's link). I had 2 orders in December and working on a cartful today waiting for my next discount voucher.
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    monotaro is a joint venture with grainger usa but...

    monotaro is a joint venture with grainger usa but much better prices than grainger.

    i have spent loads (maybe a dozen orders) at monotaro since 2014 when it popped up on a google search looking...
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    If marking at manufacture is what happens, then...

    If marking at manufacture is what happens, then the certification stamp applied locally can only be a "recertification". In which case some other mark must be a manufacture date.

    But according to...
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    Technically, there appears to be no requirement...

    Technically, there appears to be no requirement for a manufacture date. My reading of the standard suggest all gas cylinders have to be certified in Australia by an Australian certified inspection...
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    Found a Standards Australia document called ...

    Found a Standards Australia document called MP48-2008 "Certified Gas Cylinder Test Stations". As of 1/1/2003, the standard stamp of a test station is a little gas bottle on its side with a number in...
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    According to...

    According to http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=195&pageid=2144416796 AC TIG with HF overlay isn't used now...
    "These machines have now been replaced by pulse...
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    Who can make sense of these numbers?

    333268
    333269
    333270
    333271
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    Help. Perhaps you can post a photographic...

    Help.

    Perhaps you can post a photographic guide to figuring the age of the cylinder and making sense of old and new markings.

    The only thing that is clear is a big stamp 2011, sprayed with...
  13. Hmmm maybe. I got a SwapNGo green plastic skinned...

    Hmmm maybe. I got a SwapNGo green plastic skinned thinner metal BBQ gas cylinder.

    A. they only fill to 8.5kg not 9.
    B. the contract says I own the cylinder, but only they can fill it. Something...
  14. I asked them all for details of their contracts,...

    I asked them all for details of their contracts, to see how sneaky they could be. The local welding shop quoted gas refills and said that BOC would send an invoice for "rental" whenever. Hard to know...
  15. Power 10

    Power 10 deliver nationwide.
    http://www.power10gases.com.au/pages/oxygen-and-argon-gas-cylinder-deliveries-and-locations


    The price for a D size cylinder is initially $335 and when empty you...
  16. Don't forget about Stargas. I figured I was...

    Don't forget about Stargas. I figured I was better off to start renting for less commitment and less possibility of getting stung for refills if I want to do more in the beginning. The rental is a...
  17. Have looked at every deal I can find to date. But...

    Have looked at every deal I can find to date. But didn't know that anyone bought back gas bottles. That makes a difference to the high startup cost. But if I manage to keep a G size until after it...
  18. The main problem with decanting is the high...

    The main problem with decanting is the high pressure involved and therefore the safety risk with a flexible high pressure connection. There are a couple of decant kits on the market. There is also...
  19. I think it's worth complaining, though the...

    I think it's worth complaining, though the likelihood of them doing something is probably proportional to the number of consumers out there. I complained about all the phone companies advertising...
  20. Power10 gases and Speedgas have said there is no...

    Power10 gases and Speedgas have said there is no contract to sign, no condition, no terms. So from their perspective, they have sold us the cylinder and probably locked us in for life since nobody...
  21. Power10 Gases do buy/swap australia wide...

    Power10 Gases do buy/swap australia wide (according to their web site) in D and E size. Can get from my local Total Tools, so no delivery fee (quoted $50). D size cylinder buy full $335, refill...
  22. I find the ESR tester is pretty useful - was...

    I find the ESR tester is pretty useful - was recommended on an electronics forum. Bob Parker writes about his original Bob Parker's Electronic Stuff Homepage. I found the Peak Electronics version by...
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    An intermittent fault could still conceivably be...

    An intermittent fault could still conceivably be a cracked gas line.....
  24. Good job! I think it's worth posting the method...

    Good job! I think it's worth posting the method you used to debug and the actual component you needed to replace. One day, someone, somewhere will benefit from your experience, and at least one less...
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    Could it be too much acetone down the crack is...

    Could it be too much acetone down the crack is not evaporating until heated???
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    TWI article on brass and bronze Welding of...

    TWI article on brass and bronze Welding of copper alloys - brasses and bronzes - Job knowledge 112
  27. Replies
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    This is what I found in Australian Welding...

    This is what I found in Australian Welding Institute document:


    Cavities
    According to DS/ISO 6520 cavities are defined as cavities in the weld due to entrapped gases.
    Cavities are often found...
  28. Grahame, for those who don't like marketing...

    Grahame, for those who don't like marketing blurb, the article by Matsuda 1986 "Study on Gas Tungsten Electrode report 1" shows research on all the rare earth oxides, with tip photos, microscopy and...
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    EWM TIG primer has a chart on page 17 showing...

    EWM TIG primer has a chart on page 17 showing metals and electrode polarity. It says AC is best for brass, DCEN can be used.

    "7.4 Copper and copper alloysThe welding of copper is more compli-...
  30. Just curious. Learning stuff is fun. I figure if...

    Just curious. Learning stuff is fun. I figure if I learn new things thoroughly, then I can move on with confidence. The existence of "tricks of the trade" implies to me incomplete understanding. A...
  31. Thanks for that - it was interesting written back...

    Thanks for that - it was interesting written back in the 1980s when the author desrcibes arc physics being "too hard" for many.
  32. Grahame, history is interesting...... (The Wright...

    Grahame, history is interesting...... (The Wright Brothers have been found recently not to have been the first.)

    Turns out the research and images quoted by Miller on tip angle and penetration...
  33. So here is what I found from my reading: ...

    So here is what I found from my reading:


    Effect of Electrode Geometry on Maximum Arc Pressure in Gas Tungsten Arc Welding [in Japanese]
    HIRAOKA Kazuo , OKADA Akira , INAGAKI Michio
    1985 Japan...
  34. TIG tungsten electrode tip geometry - science vs wisdom?

    Have been reading about TIG tungsten electrode tip geometry. Have read a couple of research papers done with various tip angles on flat plate mostly steel DCEN. The research mathematical modelling...
  35. As an electronics engineer, you have a much...

    As an electronics engineer, you have a much better chance than me.

    My mug's method is to assume a single or small number of component failures. Assume the mostly likely suspects for failure are...
  36. As a general comment, most circuit board problems...

    As a general comment, most circuit board problems can be fixed, since it's usually just one dead component an the parts are mostly generic - capacitors, diodes, transistors, etc. Finding a pro to do...
  37. Well, not an "up-to-date" electronics guy, but a...

    Well, not an "up-to-date" electronics guy, but a DIYer who has fixed a few electrical/electronic things, often both with and without the aid of circuit diagrams. Seems usually the culprits are:...
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    Smootharc Elite TIG 230 ACDC update, parts

    Just been looking at BOC GasNGear shop. Current display model Smootharc Elite TIG 230 AC/DC has Comfort control panel version 2.47. There are two extra features: 1. Spotmatic - tungsten...
  39. Have run as many prices through a spreadsheet...

    Have run as many prices through a spreadsheet model as I can get my hands on so far. Using the WA Govt contract prices as comparator for rental + disposable + buy swap. Comparing over a total 10 year...
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    Air Liquide sells a Alphagaz 2 @ 99.9995%. ...

    Air Liquide sells a Alphagaz 2 @ 99.9995%.

    Mostly, the higher purities are for analytical purposes. The particular issue with welding is that the different companies have different specifications...
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    BTW, if you want to know how much room you might...

    BTW, if you want to know how much room you might have to negotiate on prices, check out this govt pricelist.
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    Argon ain't Argon????

    Been reading about various suppliers of argon, and the claimed purity of what they flog as "welding grade".

    Air Liquide 99.99%; also does Alphagaz HP 99.995% G size; Alphagaz 1 99.999% G size
    BOC...
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    Curious to know the parentage of the BOC rare...

    Curious to know the parentage of the BOC rare earth electrodes (turquoise end)..... at this point, this is my best guess:
    BOC has a relationship with EWM Germany, for sourcing welding machines and...
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    here is a load of dental diamond disc brands -...

    here is a load of dental diamond disc brands - apparently used for ceramic. edenta seems to have a big range and low price in Usa compared to aus.
    Pearson Dental Supplies Supplies

    i have used...
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    I just double checked, it's swiss not german. The...

    I just double checked, it's swiss not german. The one i have is Edenta 355.524.220HP. Edenta.ch doesn't seem to have a jewellery catalog. For illustration, see Balsas Dental, Edenta, Discos de...
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    I have used in the past for name engraving on...

    I have used in the past for name engraving on things:
    a. a dental technicians tool with a flex shaft that fits on a bench grinder spindle - heavy shaft, low speed
    b. a hanging motor (KaVo) like the...
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    Haven't used in anger yet. (Still need some...

    Haven't used in anger yet. (Still need some safety equipment and consumables.)

    Have pored over the manual and the similar EWM model. The BOC Smootharc Elite 230 ACDC is near identical to the EWM...
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    bocwelding ebay shop is selling Smootharc Elite...

    bocwelding ebay shop is selling Smootharc Elite TIG 230 AC/DC for $3100. Mine arrived today. The last GasNGear catalog I saw had the price go up from $3850 to $4100ish.
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    Could ask users of the EWM equivalent for more...

    Could ask users of the EWM equivalent for more feedback here:
    EWM Tetrix 230 AC/DC - Welding Forum

    Not expecting much further downward price movement with AUD going soft. Kemppi's still selling...
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    I saw Kemppi MLS2300ACX (pulse) at BOC for...

    I saw Kemppi MLS2300ACX (pulse) at BOC for $4200+GST (on special). I presume they are running out Kemppi now that they have a deal to rebadge EWM machines. That price makes them a few hundred dollars...
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