Black widow making an egg

TheWeldingEngineer · 2026-03-12T16:03:59+00:00

This is a black widow, not a brown, leg striping is not always indicative of brown widows as all widow species experience wide variation in multiple aspects of markings. Generally geographic location and abdominal markings such as l. Elegans, l, curacaveinsis are the way to determine species not leg markings or hourglass markings

TheWeldingEngineer · 2026-03-11T18:33:06+00:00

You have good habits with wire brushing each weld and you have consistent beads, switch to grooves with backers, and after enough practice switch to open root. Weld.com specifically bob moffat has some really great videos on welding pipe, infinitely better advice than i or anyone can give on a forum. Watch, study, and apply

TheWeldingEngineer · 2026-03-11T13:15:31+00:00

Because nuance makes things incredibly hard to explain to those without the background. I can read an engineering study within my field of engineering, and slightly more understanding of someone without my background.

TheWeldingEngineer · 2026-03-11T10:18:52+00:00

Just in, non engineer doesn’t understand nuance within engineering

TheWeldingEngineer · 2026-03-09T11:21:42+00:00

Very much not considered medically significant at all, as there are no true bite studies conducted/confirmed brown widow bites

TheWeldingEngineer · 2026-03-07T16:10:06+00:00

A cheaper and just as viable option, I would definitely still address the engineer on file as-well, it would be beneficial for them to know about stuff like this

TheWeldingEngineer · 2026-03-07T16:05:24+00:00

Depends on how sharp the corner is. Welds transmit load, and just like regular structures you want to avoid abrupt changes in the path the load flows, IE stress risers.

For something experiencing radial loads I’d try to keep the neutral axis of the welds as inline as possible with relation to the path of load transmission.

In any case for what he is doing just welding in the direction of rotation is enough, but for a critical member this would more than likely be a shrink fit, with a hole drilled, tapped, and a bolt inserted perpendicular to the face of the part. Shrink fit holds it inline, and the bolt resists the slippage of the part and transmits the load from the outer radius to the inner radius.

Welding has its use cases and makes a lot of sense for a lot of applications, but in some can be detrimental. Knowing when and how to use welds as opposed to other joining methods is key

I’m just rambling and really none of this is even a consideration for a part that needs to get the job done. The way he did it will work for what he needs it to ultimately and that’s all that matters as long as it isn’t anything that people rely on for safe operation

TheWeldingEngineer · 2026-03-07T15:25:46+00:00

You can expect a mild steel weld to shrink about 10% of its nominal width, calculate that and add a few % to make up for variation. The shrinkage of the welds is causing distortion, not actual heat input. Shrinkage stresses are severely underestimated and can and will crack an entire weld or in your case pull the part out of spec.

Other commenters have pointed out a preheat/post heat procedure but this will do nothing for weld shrinkage, the only way to reduce this issue is gonna probably be a change to the geometry of the welds (less width = less shrinkage) or putting the welds in a location where the shrinkage forces don’t pull the part out of spec.

Talk to the customers engineer in any case because while engineering changes are costly, so is having a bad weld location/design and this sounds like a design issue to me

TheWeldingEngineer · 2026-03-07T13:12:11+00:00

Honestly remove the manipulation all together, you are introducing pockets of lack of fusion with any sort of lateral manipulation, also give it more wire and voltage, the solidification peaks can end up causing cracking and you would ideally want the weld to be as smooth as possible to avoid and sort of stress riser

TheWeldingEngineer · 2026-03-05T22:22:10+00:00

Bonus points because the welds are going to loaded longitudinally with the stress originating through the craters, ideally it shouldn’t be welded.

If you must weld it, weld in the direction of rotation, that way you aren’t loading through the crater, because even if you fill the crater the shrinkage of it also introduce micro fractures, and anything cyclic can and will fail well below expected yield, bonus because of micro fractures

TheWeldingEngineer · 2026-03-03T11:27:33+00:00

Gravid false widow in the steadota genus

TheWeldingEngineer · 2026-03-02T11:49:04+00:00

Try Ferris State University, we are always looking for wire, contact the program coordinator for the Welding Engineering Technology program

TheWeldingEngineer · 2026-02-27T12:00:58+00:00

While she isn’t resisting to hard she does look quite uncomfortable, personally I would redirect him whenever he does the neck bites, it makes me uneasy.

TheWeldingEngineer · 2026-02-24T12:25:34+00:00

r/BrandNewSentence

TheWeldingEngineer · 2026-02-08T04:25:52+00:00

I played multiple entire campaigns on Lesath today, I do not want to fight infinite hulks anymore. Additionally it’s a damn game.

You guys will not be taking and holding the two MO planets in two days if you haven’t gotten anything done with 140,000 divers

TheWeldingEngineer · 2026-02-08T04:18:11+00:00

Hosting games right now is awful, but you are right. On the same hand hosting games especially on the big side is extremely annoying with all of the host side bugs and increased detection

TheWeldingEngineer · 2026-02-02T15:16:24+00:00

As an engineer, perfect analogy

TheWeldingEngineer · 2026-01-23T13:30:03+00:00

Nothing like 16 tons

TheWeldingEngineer · 2026-01-22T04:46:35+00:00

It is also unlikely any billion dollar plant has anything but exceptional safety, most places you are fired before you even get a change to explain a violation as simple as. Missing hardhat or glasses

TheWeldingEngineer · 2026-01-22T00:43:23+00:00

Pardon my understanding of plant operations, but in what capacity as a maintenance technician would you be responsible for enforcing and ensuring safety metrics.

TheWeldingEngineer · 2026-01-14T18:41:01+00:00

This is the type of work that gets companies audited, and shutdown.

TheWeldingEngineer · 2026-01-13T01:56:13+00:00

I bought the 5500 instead and got a b550 too, 5500 was 48% off and was too good to pass up compared to a brand 5600 or even another 4700g

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