3D Printing Handcuffs

I gotta wounder:  3D printing is getting stronger and stronger. 
especially now  that we can print with nylon (even carbon fibre re-enforced nylon)

The question is would these be tough enough ?
https://cults3d.com/en/3d-model/tool/ha ... fahunter-2

I personally would not put my live at risk by using self-printed restraints when arresting crimimals: A lighter would be sufficent to weaken any home-printable material. These won't resist anything harder used as a lever or even a simple belt thar forces apart the handcuff arms. 

However, besides from law enforcement, 3D-prints are strong enough to handle cooperative captives at home, but I won't recommend the 3D-model linked above, because it combines several disadvantages:
- no double lock feature,
- the model is inconsistent containing two development versions:
    - one version has printed springs that would break soon,
    - the other version uses a metal spring that will fix the breaking problem
- standard screws that could be unscrewed,
- screws used as hinges that either stabilize the frame or enable smooth rotation of the bows
To sum it up, the model linked above is not worth spending any download fees. You'll find more advanced stuff here (by the way, for free):
https://www.thingiverse.com/search?q=ha ... t=relevant

Never cared for ASP handcuffs. Could not see how these would be any better. I will stick with my 301's. 

Bjoern70 wrote: ↑

Dec 05, 2021

However, besides from law enforcement, 3D-prints are strong enough to handle cooperative captives at home, but I won't recommend the 3D-model linked above, because it combines several disadvantages:
- no double lock feature,
- the model is inconsistent containing two development versions:
    - one version has printed springs that would break soon,
    - the other version uses a metal spring that will fix the breaking problem
- standard screws that could be unscrewed,
- screws used as hinges that either stabilize the frame or enable smooth rotation of the bows

Thanks for the feedback

how would you make a double lock or do you have any mechanism examples 

I would try it the way shown here, but with metal springs:
https://www.thingiverse.com/thing:2487050

Bjoern70 wrote: ↑

Dec 06, 2021

I would try it the way shown here, but with metal springs:
https://www.thingiverse.com/thing:2487050

wait i'm missing something: I can see how the key rotates and that double locks slides to back it up , but how do you slide that part?

wait found it

moved by the point on the key,, or the top hole made large enough to insert the key end

like this