Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 11 of 11
  1. #1
    Join Date
    Dec 2009
    Location
    broadford
    Age
    63
    Posts
    213

    Default teflon liner in bulk?

    Hi all,does anyone know if it is possible to buy Teflon liner in bulk?i only use 1.2mm ally and haven't had any luck on fleabay etc

  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    Daniel,

    If you are in need of bulk liner you must be burning a boatload of wire.
    What sort of gun type are you running is it a Tweco type or a Binzel. From my (rapidly fading) memory there a quite different construction of those two guns alone .
    Does the liner on your bun feed into the outer spiral wound liner?


    Sizes are the next question.There is some:

    PTFE Tubing, 1/16"ID x 1/8"OD, 25 ft/pack about $66

    here

    PTFE Tubing from Cole-Parmer

    Does this help? If you get 3 lengths from that, even at $22 per length its not cheap and that's yank pricing!

    Grahame



    Grahame

  3. #3
    Join Date
    Dec 2009
    Location
    broadford
    Age
    63
    Posts
    213

    Default

    hi graham
    ive got quite a few rolls of old 1.2 mm alli which have oxided slightly and this leaves an oxide residue in the liner.im using a hanging wiper on the wire pre driver roller and the job isn't affected by the oxide as its low tec build up of road sweeper vacuum heads.the machine is a uni mig procraft which is binzel(ithink,haven't bothered),so am just looking for a quick easy fix for blocked liners to keep the machine going.I purchased this cheap welder as I only need 130amps and have dedicated it to bulk alli welding.I find the cost of Teflon tubing seems to be exorbitant forwhat it is.thanks for your reply mate.

  4. #4
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    First up 130 amps on 1.2 wire did not sound to be enough.
    I checked on the Miller site ( for Mig aloo--minum) and found this this Wire diam .046 (1.2mm)

    Spray amp range - inches per minute 285-600

    Amp range 140-270

    Spray range Volts 23-25


    Amps 170 -230

    Opt Wire feed
    370 - 450 ipm
    24 volts

    A little 130 amp machine won't have the guts to drive the molten arc into spray arc mode .It it could ,it would be running flat out 100% of the time - what does that do to your duty duty cycle ?

    I take it you have already run a few layers of wire off a spool and looked for a reduction or absence of oxidisation a few layers down ?


    What about trying one of the automotive ali cleaners?

    I think it was the mob that makes truck wash.The result on my ute was to bring the sideboards almost up to a polish.
    Immerse the roll of wire and/or liners in some of it and see what happens?

    Remember to push not drag as it will bugger up the gas cover.

    I hope this helps

    Grahame

  5. #5
    Join Date
    Dec 2009
    Location
    broadford
    Age
    63
    Posts
    213

    Default

    hi graham
    I didn't mention the machine is a 210 amp unimig procraft,its duty cycle is still pushed but its surviving so far.im finding a variation with the amps output when I look at the readout between 130 ish to 155 ish after welding but the bottom line is its working ok fusion wise once the vacuum head warms up.im thinking now that when this job ends in a month I will just give it to my son and buy a higher grade machine for the next batch as the gun is its down fall,the small short tips just cant take it.I will wait till then to source liners if its needed.thanks and cheers mate.

  6. #6
    Join Date
    Feb 2014
    Location
    Newcastle NSW
    Posts
    78

    Default

    Interesting info. I have a ross gas/gasless 150A mig on layby at gasweld and am thinking of doing small alli boat repairs (tinnies etc) seems from my research the mig wont hold up to the job...... i have the option of upgrading it to the unimig 180 but it runs on 15A power so wont be suitable for my mobile welding business.

  7. #7
    Join Date
    Feb 2014
    Location
    Newcastle NSW
    Posts
    78

    Default

    what would you guys suggest out of the two migs?

  8. #8
    Join Date
    Sep 2010
    Location
    Lebrina
    Posts
    1,910

    Default

    Quote Originally Posted by Zumanity View Post
    Interesting info. I have a ross gas/gasless 150A mig on layby at gasweld and am thinking of doing small alli boat repairs (tinnies etc) seems from my research the mig wont hold up to the job...... i have the option of upgrading it to the unimig 180 but it runs on 15A power so wont be suitable for my mobile welding business.
    Do you have much experience in aluminium repairs? I am guessing that this may be a new area for you.
    Tinny repairs are rarely the best application for a mig to be honest due to the type of material used and the numerous contamination issues presented.
    Is this a new business to you?

  9. #9
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,541

    Default

    Digressing slightly (sorry), but I worked at a place once where we had a couple of top notch Al welders - primarily TIG. One of them was asked to repair a cheap tinny by another guy at work. He had a go with his TIG but rapidly found that he'd patch one spot but the stresses that it put on the hull meant that another seam would open slightly. It was better in the end but he returned it with a tube of silicone. Tinny repairs are not as straight forward as you might think.

    Michael

  10. #10
    Join Date
    Feb 2014
    Location
    Newcastle NSW
    Posts
    78

    Default

    Thanks for your relies guys. i havent done any aluminium welding at this stage. My welding business caters for trailer mods and small general fabrication that most welders wont bother with and are primarily using arc. i currently run a toolex 160A arc and a much older CIG transarc tradesman workhorse. am in the process of buying a small mig but was just interested in future applications down the track

  11. #11
    Join Date
    Sep 2010
    Location
    Lebrina
    Posts
    1,910

    Default

    No worries mate. The step up to boat work is not a small one inasmuch as it requires a whole new skill set and presents many hazards inherrent to boats, (inbuilt fuel tanks, foam filled buoyancy chambers etc). Welding ally outdoors is possible, but wind plays havoc with your gas shield at times, neccessitating wind shields etc. all of these take time to set up and the meter is running $$$$$ while you do all this. Better to get the boat inside a shed if you can. If you had a reasonable potential customer base, I would reccommend a little AC/DC tig as a better option however I would also keep some ally wire for the mig as it is much easier tacking up with the mig when working alone. If repairing hulls, a tig is essential.

Similar Threads

  1. teflon turning
    By azzrock in forum METALWORK GENERAL
    Replies: 13
    Last Post: 19th Jun 2012, 01:35 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •