Answers.Body: <p>The presentation that senior Lego designer Jamie Berard held at Brickcon 2006 and that spawned the entire legal vs illegal discussion can be found here:</p>
  
  <p><a href="https://www.hellobricks.com/pdf/jamieberard-brickstress-bf06.pdf" rel="noreferrer">https://www.hellobricks.com/pdf/jamieberard-brickstress-bf06.pdf</a></p>
  
  <p>The particular case you ask for is discussed in slides 9 and 10:</p>
  
  <p><a href="https://i.sstatic.net/1TNGh.png" rel="noreferrer"><img src="https://i.sstatic.net/1TNGh.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-08T14:55:31.783Z
Answers.Text: Very informative. Are there other official guides like this?
Answers.UserDisplayName: MrEvers
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-08T15:15:46.437Z
Answers.Text: There are less such documents than you might think. Lego is rather secretive about there design processes.
  Jamie Berard has commented that he has come to regret disseminating this document and that internally they use an updated document that isn't available in the wild.
Answers.UserDisplayName: Michael Verschaeve
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-08T22:19:04.780Z
Answers.Text: Why the regret, and why wouldn't Lego want people to know what connections add unwanted stress on bricks?
Answers.UserDisplayName: jamesdlin
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-09T09:28:06.780Z
Answers.Text: Perhaps "regret" was a too strong choice of words. He implied something like that jokingly during a presentation I saw.
  The document itself generated a lot of discussion over the years. People started to take it very seriously, meticulously going over any lego instructions to search for instances where Lego 
  might have broken there own rules (there are many to be found). Also, many lego builders didn't took too kindly to techniques in their creations being called "illegal".
Answers.UserDisplayName: Michael Verschaeve
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-09T09:56:58.890Z
Answers.Text: I believe the lego group is hesitant to put out any official document on this because: - the aforementioned discussion it prevokes. - they being tied down by their own "rules". - as new connections are being invented all the time it is very hard to have a comprehensive document listing all things illegal/legal - possibility of leaking trade secrets which clone brands will take advantage off..
Answers.UserDisplayName: Michael Verschaeve
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-08T08:32:19.750Z
Answers.LastActivityDate: 2020-01-08T08:32:19.750Z
Answers.UserDisplayName: Michael Verschaeve
Answers.Body: <p>According to LEGO, this type of connection is illegal, since the pin is stressed when connected to an anti-stud and eventually deforms. </p>
  
  <p>People's MOCs do not follow same policy as TLG does. So you may encounter illegal connections from time to time. Pins are also cheap and usually owned in high numbers, so nobody's really bothered if one gets deformed.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-08T07:12:02.117Z
Answers.LastActivityDate: 2020-01-09T07:24:47.073Z
Answers.LastEditDate: 2020-01-09T07:24:47.073Z
Answers.UserDisplayName: Alex
Body: <p>I see it in MOCs all the time, and I’ve seen studs connect on half pins in official sets, but what about full pins?</p>
  
  <p><a href="https://i.sstatic.net/Nxi41.png" rel="noreferrer"><img src="https://i.sstatic.net/Nxi41.png" alt="Stud on pin"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-01-08T18:20:36.510Z
Comments.Text: Legal in what sense?
Comments.UserDisplayName: Peter Mortensen
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-01-08T18:35:22.673Z
Comments.Text: Here's a related question asking about the Technic pin to Travis brick connection used in at least one official set: https://bricks.stackexchange.com/questions/9702/technic-pin-travis-brick-legal-connection
Comments.UserDisplayName: jncraton
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-01-08T19:21:32.710Z
Comments.Text: @PeterMortensen There are certain types of connections that Lego set designers are not allowed to make in sets. Either because it stresses the elements or because it becomes to difficult to take the elements appart for a child. These techniques are colloquially called "illegal" Some lego fans choose to adhere to the same rules in their own creations, some do not.
Comments.UserDisplayName: Michael Verschaeve
Tags: <technic><connections>
Title: Is connecting LEGO studs on Technic pins legal?
UserDisplayName: gcw0068
ThreadText: # Is connecting LEGO studs on Technic pins legal?
  
  (Asked by: username_0 on 2020-01-08)
  
  I see it in MOCs all the time, and I’ve seen studs connect on half pins in official sets, but what about full pins?
  
  [![Stud on pin](https://i.sstatic.net/Nxi41.png)](https://i.sstatic.net/Nxi41.png)
  
  **Tags:** technic, connections
  > **Comments:**
  > **username_1**: Legal in what sense?  
  > **username_2**: Here's a related question asking about the Technic pin to Travis brick connection used in at least one official set: https://bricks.stackexchange.com/questions/9702/technic-pin-travis-brick-legal-connection  
  > **username_3**: @PeterMortensen There are certain types of connections that Lego set designers are not allowed to make in sets. Either because it stresses the elements or because it becomes to difficult to take the elements appart for a child. These techniques are colloquially called "illegal" Some lego fans choose to adhere to the same rules in their own creations, some do not.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2020-01-08. Score: 45
  
  The presentation that senior Lego designer Jamie Berard held at Brickcon 2006 and that spawned the entire legal vs illegal discussion can be found here:
  
  <https://www.hellobricks.com/pdf/jamieberard-brickstress-bf06.pdf>
  
  The particular case you ask for is discussed in slides 9 and 10:
  
  [![enter image description here](https://i.sstatic.net/1TNGh.png)](https://i.sstatic.net/1TNGh.png)
  
  > **Comments:**
  > **username_4**: Very informative. Are there other official guides like this?  
  > **username_3**: There are less such documents than you might think. Lego is rather secretive about there design processes. Jamie Berard has commented that he has come to regret disseminating this document and that internally they use an updated document that isn't available in the wild.  
  > **username_5**: Why the regret, and why wouldn't Lego want people to know what connections add unwanted stress on bricks?  
  > **username_3**: Perhaps "regret" was a too strong choice of words. He implied something like that jokingly during a presentation I saw. The document itself generated a lot of discussion over the years. People started to take it very seriously, meticulously going over any lego instructions to search for instances where Lego  might have broken there own rules (there are many to be found). Also, many lego builders didn't took too kindly to techniques in their creations being called "illegal".  
  > **username_3**: I believe the lego group is hesitant to put out any official document on this because: - the aforementioned discussion it prevokes. - they being tied down by their own "rules". - as new connections are being invented all the time it is very hard to have a comprehensive document listing all things illegal/legal - possibility of leaking trade secrets which clone brands will take advantage off..  
  
  ---
  
  ### Answer by username_6 on 2020-01-08. Score: 13
  
  According to LEGO, this type of connection is illegal, since the pin is stressed when connected to an anti-stud and eventually deforms.
  
  People's MOCs do not follow same policy as TLG does. So you may encounter illegal connections from time to time. Pins are also cheap and usually owned in high numbers, so nobody's really bothered if one gets deformed.
  
  
  ---
  
  