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The most recent discussions

Gun trigger problems

July 7, 2017, 2:34 pm

I have a wire matric 255 and I have a magnum pro 250L gun, when I plug the gun in it runs the wire without pressing the trigger. I turn it off and back on and it stops driving the wire but trigger st... Read more »

My tungsten keeps balling up institutionsly: Why?

June 10, 2017, 10:59 pm

Harbor freight Tig welder cfm: 20 ( I hear gas flow) 3/32 E3 tungsten Amperage: 100-120 The welder is not set for stick. https://www.polytechforum.com/img/5k https://www.polytechforum.com/img/5j Read more »

overhead 4F/PD fillet + galv - how difficult

June 7, 2017, 8:18 pm

Hi Structural steelwork. T-fillet welds in PD/4F position (one plate vertical; other overhead). The overhead plate is hot-dip galvanised. SMAW/stick welding with 6013 (Rutile) electrodes, which... Read more »

[VIDEO] I had an interesting fail -- steel cabinet collapsed and fell

May 19, 2017, 3:03 pm

This cabinet had been in my shop for something like four years and its load did not change much. It sat by the door. Then one day it suddenly collapsed, totally unprovoked, probably due to high win... Read more »

shield neck from arc UV

May 9, 2017, 8:36 pm

Working in the UK, I can wear a boiler-suit most of the time while welding. Neck of boilersuit sometimes un-pops, and even with overhang of visor, can get a bit of a tan on neck. With general ste... Read more »

I need to drill some holes

May 1, 2017, 8:59 pm

I need to drill some 5/16 holes through 1/2 steel plate. This is normal run of the mill plate. The fella that I buy my steel from has quoted me $495 to drill 48 holes. He claims it is a hand drille... Read more »

Can I convert my MIG (A365 mig 100) to a TIG, Is this possible please?

May 1, 2017, 1:15 pm

Hi guys I'm wondering is it possible to convert my A365 MIG 100 electric pr oduct to work as an electric TIG welder using either fusion or a very thin Tungsten rod please? I basically need to we... Read more »

Made this welding table from 2" plate

April 29, 2017, 7:43 pm

http://yabe.chudov.com/Extremely-heavy-duty-10ft-x-6ft-x-31-welding-table-2-thick-2-TONS-24676/DSC_0044.JPG Kind of interesting, made from 2 inch steel plate and really heavy I-beam legs. The I-bea... Read more »

tig welder

March 27, 2017, 10:48 pm

tig high freq Does anyone here know what the frequency & initial voltage is of the high freq ac used in TIG welders? Google's offerings seem to favor client's advertising and how to weld docu... Read more »

in Ireland:

March 5, 2017, 2:29 pm

http://www.rbduncan.com/Sean.htm http://www.rbduncan.com/TheTroubles.htm Read more »

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The best rated discussions

Help! My Project is a disaster rating: 5

Hi all, I recently took up welding. I've started with ARC welding as its the cheape st and most accessible. I spent a few days getting the hang of laying down beads with 6013 rod (the dominant r... Read more »

really really sticky slag on 7018 or 7014? rating: 5

Is it generally true that when slag adheres MUCH more tightly than usual on 7018 or even 7014 that your amps are too high? Grant Erwin Read more »

Gas lens for Miller 180SD? rating: 5

Where can I find a gas lens and pyrex cups for the original air-cooled torch on a Miller 180SD. I looked on the CK website, but they do not cross reference the gas lens to other torches. I'm also loo... Read more »

SMA rod burn galv & primer 6013 vs 7018 rating: 5

Hi all Reckon 6010 would be best. But 6010 very rare here in UK (please trust me on this, N.Am. folk). Between 6013 and 7018, which would be best? Have close fit-up between 2mm thk galv'd and 8mm th... Read more »

Thermal Arc 3 or single phase rating: 5

I have a Thermal Arc 250 GTSWSE AC/DC welder and need to know if it can run on 220v single phase and if so what is the setup wiring etc. any advice is much appreciated thanks Brian Read more »

Converting Old Miller To a Generator? rating: 5

I have an old Miller Big 20 300 Amp welder that I can't seem to sell at the low price of $1000.00 CDN. The motor is old (1977) but it runs well and the machine welds great, but it's big ugly and ol... Read more »

acetylene gauge pulsating rating: 5

What causes a acetylene regularot to start pulsuting? The manifold is about 5 years old, with about 10 hours of use. This is my second regulator doing the same thing. Do i throw it away again and bu... Read more »

can't get a 6013 weld on a t join. complety gone bonkers!! rating: 5

just when i thought i had my 6013 flat welds looking great I started trying T joints. I get two parallel beads on each plate but no joint. Oddest thing ive ever seen. I was using 3/32 6013's on 1/8in... Read more »

contact tips for speedway flux welder rating: 5

I have been looking for contact tips for my speedway will harbor freight tips work? Thanks Read more »

Propylene instead of acetylene? rating: 5

Id like to know the differences in using these two fuels for normal around the farm cutting and brazing. I understand that propylene is safer, has more in the tank, is cheaper..and thats all I kno... Read more »

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