How to Build a Cardboard Combination Padlock

 by tardis fan
Featured

Step 1: Tools and Materials

IMG_5533.JPG
Not many things are required to make this lock.  It's mainly cardboard.

TOOLS:
-Ruler
-Box cutter / razor blade
-A cutting mat (so you don't gouge your table)
-Pencil
-Hot glue gun and extra glue sticks
-A compass (the kind used to draw circles)
-Hole punch (apparently this can be used to punch the holes for the washers and such. (thanks to swhitaker2 for discovering this))

MATERIALS:
-Corrugated cardboard
-Two new pencils
-Large paperclip
ThePorsche8 says: Jun 6, 2012. 5:24 PM
u did a really nice job! i really want to build it but it looks so complicated. can you give some tips on how i can build it without being worried please.

that will give me a lot of help.
tardis fan (author) in reply to ThePorsche8Jun 7, 2012. 6:47 PM
Thanks a lot!

To begin, lay out all tools and materials in an organized fashion on your work surface. Once you're ready to start, take each step one at a time, and don't rush. You can always start over if something goes wrong. Remember to clean up the little scraps that aren't needed off your work surface, because having a clean desk helps a ton.

And believe me: it really isn't nearly as complicated as it looks once you start!

Hope I helped, and good luck!
insttuctable8 says: Apr 25, 2012. 6:34 AM
cool project you should make another that can actually lock a box, And make it smaller because it is huge please try
macrumpton says: Apr 2, 2012. 5:47 PM
This looks awesome.
I think it might be even better if you used laminated layers of solid cardboard, like the stuff used for cereal boxes rather than the corrugated stuff, as it would be a lot more durable. After all it is a lot of work, so you want it to last.
244 Jake says: Mar 10, 2012. 4:12 AM
Great post as to how the lock system works, Any way a completed safe could be shown.

Yesterday I received this. Most cool. I do NOT beleive it's evil to show a different way to do the same thing. Even if this was 3 months after YOURs.

http://www.robives.com/blog/papersafe

Could you do the next step, Please, show how to connect to a door handle. I want to make a big Toy Gun Safe, out of card board, say the card board box a refrigartor would come in..

Big Jake
samaw129 says: Jan 24, 2012. 7:39 PM
hey, im back,
any way to add a door? trying to win a bet that i built a cardboard safe
tardis fan (author) in reply to samaw129Jan 25, 2012. 6:34 PM
You could try to connect the locking bar to a linkage so it draws back a bolt unlocking the door. Experiment!
samaw129 says: Jan 22, 2012. 1:26 PM
hole punchers work well for the washers :)
tardis fan (author) in reply to samaw129Jan 22, 2012. 5:41 PM
Never actually thought about using hole punchers for that. I might add it to the instructable.
samaw129 in reply to tardis fanJan 23, 2012. 5:50 PM
haha yeah worked for me!
thing 2 says: Jan 17, 2012. 7:21 PM
Could you upload a video that shows how it works/a demonstration?
tardis fan (author) in reply to thing 2Jan 22, 2012. 5:48 PM
Most likely I will. Just have to find the time. . .
BuhBomb says: Jan 15, 2012. 3:59 PM
This reminds me of Furio Tigre's cardboard badge...
ihaveguitarskills! says: Jan 7, 2012. 4:34 PM
you should make the lock mechanism smaller, so you can put stuff in the box.that's what im going to do.
tardis fan (author) in reply to ihaveguitarskills!Jan 8, 2012. 11:08 AM
Cool! Post some pics when you do.
ghostpotato says: Jan 5, 2012. 7:51 PM
epic!!!

i made this and only tool me about a hour and it works awesome.

might make a full case for it so you cant just look over the back and align them.
if i make that i might post some pictures. O and also knex rods are a good substitute if you don't want to use up pencils

p.s. be careful when hot gluing i got a nasty burn in my left pointer so now it hurts to type. lol why am i making this comment so long then??

this is truly ingenious and im giving a 5* for sure

my finger hurts :(
ihaveguitarskills! in reply to ghostpotatoJan 7, 2012. 4:36 PM
i was hot gluing once, and I was kicked in the head. it burned me);
ghostpotato in reply to ghostpotatoJan 5, 2012. 7:53 PM
oops in second line i made a mistake i meant only took me an hour not tool me an hour srry
tardis fan (author) in reply to ghostpotatoJan 6, 2012. 3:18 PM
I'd be interested to see how the covered lock turns out.

Hot glue burns are nasty, aren't they? I got one while making the base and had to take the picture as fast as possible!
heathbar64 says: Jan 1, 2012. 5:49 PM
Very funny thing. I made one very similar to this a few month ago. My daughter had her first combination locker at school and I thought knowing how it worked would help her with getting it open.. too bad I didn't take a picture.
tardis fan (author) in reply to heathbar64Jan 5, 2012. 1:17 PM
This model is good at teaching about locks. My family has learned from it as well.
rimar2000 says: Jan 1, 2012. 1:50 PM
WOW, what a good work!
tardis fan (author) in reply to rimar2000Jan 5, 2012. 1:16 PM
Thank you!
tinker234 says: Jan 4, 2012. 1:14 PM
wow great work
tardis fan (author) in reply to tinker234Jan 5, 2012. 1:16 PM
Thanks!
LostRite says: Jan 1, 2012. 9:21 AM
I was just wondering why no one has posted an ible on this. It is very amusingly handy for all sorts of rediculousness. Well done!
tardis fan (author) in reply to LostRiteJan 1, 2012. 10:45 AM
Thanks for the complement! Try your hand at making one!
kelseymh says: Dec 31, 2011. 9:48 PM
Now that is really awesome. Way back when I was teaching physical and information security courses, this would have been a brilliant take-home project for my students.
tardis fan (author) in reply to kelseymhJan 1, 2012. 10:42 AM
Thanks! If you make one, be sure to let me know!
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