                   .:                     :,                                          
,:::::::: ::`      :::                   :::                                          
,:::::::: ::`      :::                   :::                                          
.,,:::,,, ::`.:,   ... .. .:,     .:. ..`... ..`   ..   .:,    .. ::  .::,     .:,`   
   ,::    :::::::  ::, :::::::  `:::::::.,:: :::  ::: .::::::  ::::: ::::::  .::::::  
   ,::    :::::::: ::, :::::::: ::::::::.,:: :::  ::: :::,:::, ::::: ::::::, :::::::: 
   ,::    :::  ::: ::, :::  :::`::.  :::.,::  ::,`::`:::   ::: :::  `::,`   :::   ::: 
   ,::    ::.  ::: ::, ::`  :::.::    ::.,::  :::::: ::::::::: ::`   :::::: ::::::::: 
   ,::    ::.  ::: ::, ::`  :::.::    ::.,::  .::::: ::::::::: ::`    ::::::::::::::: 
   ,::    ::.  ::: ::, ::`  ::: ::: `:::.,::   ::::  :::`  ,,, ::`  .::  :::.::.  ,,, 
   ,::    ::.  ::: ::, ::`  ::: ::::::::.,::   ::::   :::::::` ::`   ::::::: :::::::. 
   ,::    ::.  ::: ::, ::`  :::  :::::::`,::    ::.    :::::`  ::`   ::::::   :::::.  
                                ::,  ,::                               ``             
                                ::::::::                                              
                                 ::::::                                               
                                  `,,`


https://www.thingiverse.com/thing:2437743
GoPro Plastic Bottle Cap Mount by behin is licensed under the Creative Commons - Attribution license.
http://creativecommons.org/licenses/by/3.0/

# Summary

GoPro Plastic Bottle Cap Mount
The idea is to use any plastic bottle as a grip/stand/floaty at the same time.
I saw plenty of solutions here on Thingiverse as well, but I did not find any of them perfect.
The concept is brilliant, you get basically a free GoPro grip, which at the same time makes your camera float. Though a 3D print is most likely not 100% watertight, it is good enough to make your GoPro float in water.

I designed it 3D-print friendly, but also with common engineering sense:
- no need for supports, the big inner overhang is sloped
- sharp edges are rounded: especially important in high stress areas
- also the edges sitting on the printbed are smoothened: they could cut your hand otherwise when tightening the cap
- walls are thick enough that some infill will be printed to get a sturdy part (two other prints I tried from the site where bendy, weak)
- yet tried to keep size to the minimum not to get a bulky part
- surface is grooved to create better grip

I used the standard thread called PCO1881. This is the newer style -  lightweight and lower profile,  against the older PCO1810. Outside diameter is 27.4 mm and pitch is 2.7 mm.

The drawing was printed, used and tested diving in a lake with the GoPro Session and I was satisfied with it.
I hope you will enjoy it!

# Print Settings

Printer Brand: Prusa
Printer: Prusa Clone
Rafts: No
Supports: No
Resolution: 0.2 mm layer hight
Infill: minimum 20% suggested

Notes: 
I used PETG with 50mm/s print speed, 2 mm retraction.

# How I Designed This

The part was designed in Autodesk Fusion 360 by measuring the physical parts with a caliper gauge.