i think hes making manifolds. thats a pretty common method here for turbo manifolds. Yeah.. Especially turbo manifolds that are expected to also 'carry' the weight of the turbo and not use extra struts/supports. Regular 304 stainless gets pretty malleable at exhaust temps close to the head so it ne...

They look good.. I went the cheap route and got some (plumbers) pipe stoppers they use for closing off and (pressure-)testing pipes: https://www.pipestoppers.net/images/products/Nylon-Plugs-Hollow-4.jpg I run a tight fitting hose through the center and put a sintered bronze air diffuser/silencer on ...

As it's all nice 90-degree corners, I'd say fixture/clamp it up to a chill block to help draw some of the heat away from the thin work piece and stop it going all hot and wobbly on you. Nicest would be a copper block as it will suck the heat out like mad, but you could already experiment with just a...

Google-fu throws up a mention of this with a similar query ( https://weldtalk.hobartwelders.com/forum/equipment-talk/mig-wire-welders/36514-question-about-194014-gun-liner ) and that turned out to be answered with: As far as the nylon liner inside that I was questioning....it's in there. Before I cu...

When I strike an arc on this mild steel (which I have cleaned and wire brushed), I get a distinct green vapor and the steel bubbles and spits. This crap gets all over my tungsten and makes welding impossible. Normally I'd say a green arc/vapour like this is when the base metal either has a plating ...

An option could also be a 3/8" annular cutter with some sort of mill or drill press (or even a magbase drill) and a jig. That would probaly give the quickest and cleanest result with repeatablity, especially if you are kind of doing 'production' runs. Eg. https://store.evolutionpowertools.com/p...

Small word of caution. I don't know where you are located in the world, but in some countries/regions cranes, hoists and such can be subject to requirements of having an engineered and signed-off design and possibly inspections before they can be built/used, even for private individuals (think insur...

Seem to be on amazon..

https://www.amazon.com/WeldingCity-41V2 ... 4Q5T2?th=1

5 3/4" long may do it?

Bye, Arno.

Yup.. Sounds odd as ER70 is basically a low carbon, mild steel and should not be hard to machine.

Perhaps prior experience was using it to build up a high carbon steel or cast-iron that increased the carbon content and hardened the resulting weld? That would make machining difficult..

Bye, Arno.

I suspect the risk is tiny to non-existent, but as it's known that a welding arc can create phosgene gas (COCl2) I'd keep any chlorine compounds away from either your workpiece or your tungsten. The carbon and oxygen in the formula is easy to get from normal contamintations and muriatic acid (HCl) r...

i have no idea what would stick to lead. i would be inclined to simply box it in. Yup.. Or a slight mod/change to boxing the stack of plates in in is to add some vertical plates on the steel plates as a base with optionally some pins/bolts sticking out to make a box/cup. Make sure to make the 'cup'...

This is the kind of job where something like solarflux-b works great to prevent sugaring: https://www.harrisproductsgroup.com/en/Products/s0fb01 Add some alcohol to the powder (methanol is the preferred), mix up a paste and smear a little on the back of a weld area. It will cover the back of the wel...

It's good to experiment and get seat time on something like this, but to be realistic: fusion welding alu usually doesn't work too great as the welds tend to be very weak and crack quickly without any filler. For steel and stainless it's a good option if your fitup is tight. On alu it's never going ...

Yup.. For continued corrosion prevention you want to finish off with a passivation step. Keeping the HAZ as small as possible with a tight arc will also help a lot. LIke mentioned above the problem is that the HAZ has basically drawn or 'boiled off' some of the nickel and chromium from the stainless...

See/Google if any info is out there as far as schematics or on pedals for your machine to be absolutely sure, but yeah.. 10K is a very common potentiometer in pedals and knobs for TIG machines. In many cases the actual resistor value doesn't even matter that much as most machines use it as a voltage...

Commonly a bath in hydrochloric/muriatic or sulfuric acid will take it off. Take the proper precautions though. Gloves, glasses :geek: , covers, etc. as you don't want to get that on you. Also the acid fumes will attack lots of other parts in your workshop too so good ventlation or working outside a...

Yup.. Either use a normal cutting oil and clean with acetone to really get it off the part before welding, or check out some water soluble cutting fluids which can in some cases also be used 'neat' and will wash off more readily with just water and possibly some detergent. Any residue left will caus...

Nice dog!

Side-note.. Make sure the dog is not in the room when/where you are welding. They tend to look/stare at the arc and they get the same eye problems as we do without a helmet..

Or get him a set of auto-darken goggles

Bye, Arno.

The flux on underwater rods produces a shielding gas that also pushes any water away when the arc is going and the extreme temperature of the arc itself vapourises the water rapidly.. Pretty similar to a normal rod that provides a shielding gas from the oxygen in the air. Striking the arc is the mos...

So is zinc vapor THAT bad, like cyanide bad? No. Zinc oxide exposure is fairly harmless in the short run. It can make you feel quite sick with coughing, fever and such, but unlike lead and other heavy metals like cadmium it doesn't accumulate and poision you long-term. Eg. see: https://en.wikipedia...

I sure relate on the glasses. I have tried different glasses and different cheaters. I need to accept the fact that I'll never see as well as I would like. One component of getting older is also that your eyes need much more light to work well compared to when you're younger. Strong lighting focuse...

Messer Griesheim is a very old german welding and cutting tech company that can trace it's origins back to 1898 They are still around and are a pretty big company that have different sub-companies (including trading in welding gasses) that make pretty much anything. Most of the stuff they make these...

I heard of a product called "solar flux" that you can apply to the back of the weld so that penetration doesn't result in sugaring, but not sure how it works. It's a powder that you mix into a paste using methanol, let it set up and apply to the back of the joint. You then weld it as norm...

See:

https://www.youtube.com/watch?v=060NbYoOAio

Kinda works, but not great. Can be (ab)used on thin steel sheet with MIG to reduce the risk of blowing through.

Bye, Arno.

Good result! Castings can be deceptively heavy as they tend to have much thicker walls and features compared to clean machined/billet parts as they need to be dimensionally stable while being cast. Too thin features tend to distort or not fill out evenly during the casting so that's usually avoided....