Dangerous prints

one could die only once…for the remaining 999 ways, one needs to be resurrected as many times as many ways there are…
:wink:

Yes - similar to EU standard EN1078 or UK BS EN 1078. This would do nothing for you in a crash or fall scenario.

To pass the BS standard you would need to submit to someone who validates for British Standards Organisation. You cannot just test via an equivalent and declare it to be “compatible.” BS and EU standards align to keep standards equivalent pre and post Brexit. Same goes for ISO. A third party will usually either take away the product for testing off site, or come to your site to assess whether or not you meet the standards for a service, process or product. I’d find it very hard to believe this was done for the helmet in question.

The “certificate” attached it one from a scientific testing institute in China. This isn’t a BSI cert - quick check under Validation & Verification | BSI shows nothing for various variants on the company name. The “certificate” attached is not a BSI cert, the product has not been tested by a BSI certified tester under their own standards.
Besides the standard isn’t “GB 811-2022” its BS EN 1078 which is same as EU standard 1078. Without that certification this isn’t certified under that standard, and the claim that it meets a GB standard doesn’t ring true.

GB does not stand for Great Brittan, it is “Guobiao” 国标, meaning “national standard” in Chinese. GB 811-2022 is an existing Chinese standard for helmets, and he didn’t claim it met that standard he said it met some parts of that standard.

1995 is not a recent study. 1995 was 30 years ago. Get a grip. PLA is different now. I once drank out of a straw made out of PLA that I printed and i went to the hospital because there was a piece of PLA stuck in my throat. I also got food poisoning and was sick for days.

NO FILAMENT IS FOOD SAFE AND YOU WILL NOT EVER CHANGE MY MIND. Bacteria spreads throughout prints as it travels through your nozzle. PLA is also very fragile and can break off and contaminate your food or drink.

Same thinking applies to prints intended for use in relation with electricity…as clearly demonstrated below…

That’s a pretty poor design for the fork. The handle or the prongs will not fit into the socket. Maybe a steak knife would be a better choice. Best of all, a pair of scissors, you may be able to get a nice spark with those.

Even better is the line that says “perfect for all ages” :rofl:

This one Grocery Carrying Tool + Self-defense Knuckle Duster - Free 3D Print Model - MakerWorld is probably not “a prop or a toy”… sitting right there on the front page of MakerWorld!

According to the Community Guidelines - MakerWorld

General Guidelines

The following guidelines outline behaviors that are not allowed on MakerWorld. These rules are here to ensure a respectful, safe, and creative space for all users. Violations of these rules may result in content removal, account suspension, or other enforcement actions.

5. Regulated goods such as:

  • Firearms: Models that can be turned into a working firearm or explosive (does not apply to props or toys)
  • Illegal models or objects
  • Illegal or regulated goods, or services or transactions

I’d just like to mention that, although I’m not in favour of it, it’s actually allowed in many countries. Some people forget that this is an international website, especially when I look at the rather childish discussion in the comments below the 3D model.

Many people assume that the legal situation in their own country applies everywhere, instead of thinking internationally. But don’t get me wrong, I would also prefer not to see something like this on Maker World, but I don’t see any violation of the rules.

It’s true that laws vary internationally, but MakerWorld’s rules aren’t meant to defer to the most permissive country… they follow the standards of the platform itself.

MakerWorld is incorporated in Singapore, where brass knuckles are prohibited weapons under the Corrosive and Explosive Substances and Offensive Weapons Act. That’s the jurisdiction under which the site operates, and its Terms of Use (Section 14) make this explicit… disputes and enforcement are governed by Singapore law and settled under Singapore International Arbitration Centre (SIAC) rules (link).

So, regardless of whether such items are legal elsewhere, from MakerWorld’s own legal and operational standpoint, brass knuckles clearly fall under “regulated goods” as defined in the General Guidelines. This isn’t about individual countries’ laws or personal opinions… it’s about applying the platform’s own stated policies consistently.

Had a chuckle at seeing that one. It’s more dangerous to the person holding it. Holding it knife side out and the pokey things are sticking into you. Hold it pokey side out and the knife side is cutting into you.

Arguing like this makes more sense than simply posting a list of rules without comment. That’s true. It provides more context than your initial post. Ultimately, it’s up to MakerWorld to decide. As I said, I would also prefer not to see something like this on MakerWorld. My point was that your initial comment lacked the information needed to justify it.

It’s always difficult because there are so many dangerous items, such as the countless knives on Maker World.

And while we’re on the subject, what about 3D printed erotic toys? Yes, they really are extremely dangerous because they can break inside the body and cause serious injury. Actually more dangerous than any knife. Although 3D printers may look like toys these days, they still require you to think and to be responsible.

Here is one of many examples that can be found by entering “knife” or “Karambit”. As I said, I would rather not see that either.

Here’s one of my all time favorites…

I just stumbled across this topic while reading another discussion and wanted to know what the current situation is. After about two year, has it gotten better or worse?

What can I say? MakerWorld is once again full of dangerous 3D prints:

I’m not going to post them all here, just a few as examples.


Bypassing electrical safety…


Sure, and all the throwing stars, knife, etc.


or just plain real weapons… no, it’s not decoration or a toy. The bow in the example, for instance, shoots real arrows.


This isn’t meant to be a criticism, but it does seem a little strange in the context that MakerWorld made a big announcement just a few months ago about becoming more family-friendly.

Owning and shooting bows (archery) ain’t restricted in Europe, and in most western countries , as long as the shooting part is done in secured areas, with proper protection put in place. In other parts of the world owning and shooting a bow is a national tradition and pass time (think of Bhutan, South Korea, Finland, France, just to name but a few more prominent). Other countries have regional or ethnic groups where archery is a traditional practice and where owning not just one but several bows is the norm. The Xibe people (Chinese ethnic group) have a rich archery tradition that is deeply woven into their history. The Sakha people (Yakut, Siberia) have a longstanding tradition of archery linked to their hunter-gatherer lifestyle. Many indigenous groups across continents use archery as a vital hunting tool and cultural practice (think of Brazil’ Amazonian indigenous population, or the indigenous people of North America, like the Sioux or the Cheyenne (without even considering the nowadays tradition among plenty of Americans of bow hunting). And, when speaking of archery, we should probably cover countries from Middle East and Far East as well…

Now, if someone builds his/her own bow and starts shooting arrows (whether in his/her backyard or somewhere else) without knowing the security norms and proper shooting practices when using a bow (purchased, handed over, self built, or 3d printed) and gets him-/herself (or others) hurt, that’s on them. Can’t be helped. Also, do remember that kids almost everywhere are improvising their own bows and shoot improvised arrows when playing.

However, that being said, I do agree that encouraging the use and distribution of untested and uncertified electrical improvisation should be banned.

I wasn’t talking about local rules – people can do as they please; I’m not one to judge. I was referring to the fact that MakerWorld announced that it was going to become more family-friendly.

Quite a few NSFW and inappropriate models have been deleted, yet weapons and unsafe prints are still widespread on MakerWorld. In my opinion, it cannot be called family-friendly when there are so many brass knuckles and other weapons on MakerWorld. They’re not just decorations; they’re designed to hurt people - there’s no point beating around the bush about it. Sure, there’s probably a sports-related context, too, but I’m talking about the big picture.

I understand your point, but you’re focusing on one example out of thousands. If you don’t like the example of the bow, choose one of the hundreds of other weapons, such as this one - still available on MakerWorld.


Edit: And just to clarify: I’m not in favor of a blanket ban - on the contrary - but there should be some distinction made when it comes to “family-friendly” content and weapon content, especially if MakerWorld explicitly markets itself as family-friendly - even had tightened the rules a few months ago.

Indeed, next to electrical improvisations, the NSFW should be kept in a restricted and controlled access area…

My point being…