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The most recent discussions

Welding table,checker plate.

March 30, 2020, 7:22 am

Would I make the working surface flat or use the checker side as the table surface? Read more »

New Medicine for Corona virus (COVID-19)

March 20, 2020, 12:31 pm

Corona virus medicine / vaccine COVID-19 medicine today - There is already a finished medicine for Corona virus (COVID-19) in Finland. Faron Pharmaceuticals Oy (FARON) already has Corona medicine,... Read more »

v-up E7018 150A 4mm / 5/32nd" rods

March 15, 2020, 7:39 am

Lincoln Foundation's Welding Procedure Handbook has 5/32nd (4mm) 7018 at 150A for T-fillet|vertical-up|Code-quality|fair-weldability. Taught v-up T-fillet at college with around 85A and smaller rod... Read more »

Airco 300 squarewave welder. Need manual

March 9, 2020, 2:18 pm

Looks similiar to syncrowave 300 -- for full context, visit https://www.polytechforum.com/welding/--.htm Read more »

Acetylene B Tank adapter to Mapp Gas Canister???

February 11, 2020, 10:26 pm

I was looking to purchase a guys turbo torch. It comes with the quick change handle, a small tip, regulator and hose. The regulator attaches to a Acetylene B tank. The B tanks are expensive and I onl... Read more »

oxy-propane pressures & conditions

February 2, 2020, 1:01 pm

I've recently had a perfect job to refine my oxy-propane cutting conditions. Goldilocks (just right) challenge. I was doing paper engineering during the transition from oxy-acetylene to oxy-propa... Read more »

return lead 2 clamps structure and item?

February 2, 2020, 12:14 pm

Hello all Yup it's pouring with rain and there's an emergency welding job which has to be done... Does it help to have a return lead with two clamps - one attached securely to the structure (in t... Read more »

Diffuse heat from an arc welder?

January 29, 2020, 12:37 am

Is there a practical way to use an arc welder for the sort of heating traditionally done with a gas torch? Long ago there was an atomic hydrogen torch which consisted of an arc with hydrogen blow... Read more »

6010 SMAW scaffold tube railings

January 13, 2020, 4:28 am

What conditions (rod size, Amps, etc.) and techniques would you use to weld scaffold tube to make railings? Standard scaffold tube - 48.3mm OD, wall thickness about 4mm, galvanised (I think that's... Read more »

Cold Weld ???

November 29, 2019, 5:59 pm

I made a pin puller yesterday as a project with my dad when he and my mom stopped over yesterday for Thanksgiving. Basically I welded a 5/8 mild steel rod to a pair of locking pliers (Great Neck... Read more »

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The best rated discussions

Heat Calculation In Hot Wire TIG

rating: 5

Hello to all , I heard that Hot Wire TIG is having high deposition rate than normal TIG, is the fact behind this is 'only the additional power source which we use for heating filler wire' ... Read more »

Hypertherm Max20

rating: 5

I have a Hypertherm Max20 plasma cutter that has fried 2 resistors on it's circut board and I need to know what their value is to replace them. The resistors are R25 and R26 on the main PCB marked Ch... Read more »

Miller Snap Start - HF-251 differences??

rating: 5

TIA for any information on the following units: Is the Snap Start able to output continuous HF or is it only for arc starting? What is the diffrence between the Snap Start and Snap Start II? Are they... Read more »

Airco 300 Square Wave info request

rating: 5

Wellllll....by a rather odd and weird roundabout way..I wound up with an Airco 300 Squarewave welding machine today. Came with the usual Bernard coolant pump, Harris flowmeter, Weldcraft 20 torch etc... Read more »

Lincoln Square Wave TIG 275 problem!

rating: 5

Help please! My machine is behaving most rudely. It starts off fine an after a few seconds the main arc goes out and just leaves the HF arc and a hissing sound. When I start the machine cold it works... 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 »


rating: 5

I bought a bunch of welding stuff. I looked in the treasure chest and saw a set of regulators and hoses and torch. The torch had a rosebud on it, and a cutting head separate. A lot of welding an... Read more »

NexGen question

rating: 5

I am DIRECTLY on the path of the upcoming Sunday eclipse. I am going out to set up my camera the next few days. I sent the wife to the welding store, and they have sold 26,000 # 14 lenses in the ... Read more »

Branson Power Supply Manual

rating: 5

We use Branson Ultrasonic Welding equipment for plastics joining. Most of it is fairly old and showing its age. We need to service in house but the maintenance manuals we have don't seem to jive wit... Read more »

Weld Measuring Gauge- Navy calls it PN-7...

rating: 5

Howdy, all! I'm looking for info on a guage used by the naval shipyards- we call it a PN-7 guage, but I cannot find any on-line. It looks very much like a combination square, but is ruled down bo... Read more »

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