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Thread: teflon liner in bulk?
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4th Feb 2014, 03:52 PM #1danielson
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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
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4th Feb 2014, 04:20 PM #2
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
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6th Feb 2014, 08:52 AM #3danielson
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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.
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14th Feb 2014, 12:25 PM #4
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
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14th Feb 2014, 06:21 PM #5danielson
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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.
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14th Feb 2014, 06:42 PM #6Member
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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.
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14th Feb 2014, 07:48 PM #7Member
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what would you guys suggest out of the two migs?
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15th Feb 2014, 02:49 PM #8Most Valued Member
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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?
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15th Feb 2014, 08:27 PM #9Philomath in training
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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
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15th Feb 2014, 09:54 PM #10Member
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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
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16th Feb 2014, 08:23 AM #11Most Valued Member
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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.
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