Introduction: Homemade Butterfly Knife

Picture of Homemade Butterfly Knife

i made a butterfly knife out of some scrap metal i had in my back yard.
these weapons are illegal in some states.

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Step 1: Homemade Butterfly Knife

Picture of Homemade Butterfly Knife

first you want some scrap metal..
your gunna need a measuring tape, a disc cutter, a pen or a marker, and some nuts and bolts.
measure out the handles (what size you want) and mark the measurements.
take the disc cutter and cut out 4 handles.
do the same thing with the blade and drill 2 holes in each handle.
(making this knife may take a few tries to get it right).
take the screws and slide them threw the holes and bold them on.
you might have to grind the screws down with a bench grinder or a disc cutter.
to sharpen the blade, first shape it out to the way you want it and work on grinding it down, again, with the bench grinder or disc cutter.

Step 2: Homemade Butterfly Knife

Picture of Homemade Butterfly Knife

remember to make a tang pin hole in the blade.
this is where you will find some sort of metal pin to place in the tang.
i used 2 thick wood staples and twisted them with pliers.

Step 3: Homemade Butterfly Knife

Picture of Homemade Butterfly Knife

and now you butterfly knife should come out something like this-


Hands Without Shadows (author)2008-06-05

You might want to add something about the legality of these knives/

its legal here in Idaho

he did he says "the're illegal in most states"

that's actually the makers responsibility, knife laws differ throughout the world (as where this instructable can be seen) ;-)

AdnamaG (author)2014-10-04

I don't have any metalworking tools

epicalien (author)2014-07-10

Cool but i live in canada and it's illegal to have one here :(

nova612321 (author)2013-08-09

I just made a butterfly knife similar to yours. im new to this and I want some constructive criticism. thanks!

zork the destroyer (author)2013-05-26

really cool

nchoy (author)2011-09-25

Are the handles just made out of scrap metal or wood?

curt-fullmer (author)2010-11-17

Very cool. Im working on a lesson on how i made mine.

zigzagchris (author)2010-04-02

just learned empty soup can doesn't count as scrap metal the way that leaves cuts allover your fingers. :( almost done with a decent wooden "practis" one

xbox1kid (author)2010-03-22

thats the best homemade balisong iv seen 5/5 *

i need some help
when i was is the states i saw in an army surplus store i saw butterfly knifes that looked kinda like a nut cracker
how could i put a groove into a stainless steel nut cracker
plz respond
ps sick butterfly

mista.v (author)2010-02-04

 That is a damn fine knife.
Should it be easy enough to make without an angle grinder? All I've got is a hacksaw. Could get some files, but don't have any atm. Are there any substitutes for a file?

disturbedreaper (author)2009-01-22

man i wish my dremel could hamdle anything thicker than 1/16 thick steel i love this ible having troble finding metal though im thing to keep my eyes open for an old filing cabnit you think i could get that to work

Kaiven (author)disturbedreaper2010-01-27

My dremel can't drill through didly squat. I have to use a drill...

Hyper Burner (author)2009-09-23

whats is with the third hole?

weaponscollector94 (author)2009-08-20

nice i have made a few balisongs and it looks kinda like this one!

xerxesx20 (author)2009-07-21

Nicely done, I also like the end result, with access to a lathe, one could turn some bushes for all the joints and thus behold! Nice smooth slide action. 4/5 Stars. (Not five because the images are blurry, metadata and file name suggest either a small Canon or a small Eastman Kodak was used with short ish exposure times. Should be plenty good enough for (a) sharper image(s)) On the whole, good work none the less.

graveciminal (author)2009-07-06

damn thats the best looking homemade balisong I've ever seen that looks like the cheap 30 dollar ones but still that take alot of skill just the most amazing work ever props man props I own a real balisong though I have a permit i live in florida

goeon (author)2008-11-18

awsome does it flip like a true butterfly knife

disturbedreaper (author)goeon2009-01-10

it should if it is done right but most likey it would be a little of balence and ethier very still or wobaly

goeon (author)disturbedreaper2009-01-10

ok thanks

disturbedreaper (author)goeon2009-01-11

np let me know how yours turns out you will probaly finish befor i can work on mine i need to find scrap metal and i have midterms. also if any one know a good spot to look for the metal for the handles let me know

goeon (author)disturbedreaper2009-01-11

try the metal from the outside of a cd drives

disturbedreaper (author)goeon2009-01-14

thanks ill keep my eyes open for one

foxdart14 (author)2009-01-12

dude for making it from scrap metal u did a awsome job

maggotmatt (author)foxdart142009-01-13

Thank you.

2k4u (author)2008-08-23

I hope you don't swing and twirl it like a real bali-song. I could very easily see it coming apart on you, and slicing a finger off. I know, I bought a cheapy butterfly to practice with before I got a $180 BM42, and one day the blade simply detached itself from one of the handles...

disturbedreaper (author)2k4u2009-01-10

wow thats not good i have a 20year old balisong witch the pins got busted so i made new pins from a coat hanger which is suprisingly strong and hammered to turn the ends to like a rivit. and it seems to work realy good and glyds so nice but i do check the pins befor i use it

maggotmatt (author)2k4u2008-09-07

yes i do twirl it like a real balisong. and i highly doubt its going to fly apart like that, considering all that lock-tight i put in the bolts.

Vendigroth (author)2008-10-03

UK members should bear in mind that butterfly knives are on hte banned list, along with switchblades and knives with knuckle-dusters on the handle. Even if they're found in your home here, you can be prosecuted. Other than that, 's not a bad instructable.

R u serious?! i just made several knives that defo cudnt pass as cutlary...

oh im calling the polizia on your ***! jk just hope no cops raid your house any time soon lol.

nave (author)2009-01-03

i think this had the potential to be pretty good, maybe if you went into detail of what you want for the handle, of where to buy the stuff to make it, and assembling the knife, it would be better

maggotmatt (author)nave2009-01-04

if you know where anyone can buy sheets of steel and thick sheet metal, be my guest to tell anyone who would like to know.

Shadowfury (author)2008-12-08

Nice, but a little lacking in detail. Also, you may want to temper your blade and add the instructions. Tempering the blade would make your blade a lot sharper. Also, aluminium makes for a lighter knife, thick aluminium, that is. Elaborate on the instructions a little, it'll make your instructable much better. And for the tang, either add another pin higher up the blade, or add something to stop the blade from coming out the sides and slicing your hand. Add a T latch to the bottom so it doesn't open in your pocket, as well. Anyway, just my thoughts. Message me for instructions on how to make the latch and temper the steel. -SF-

maggotmatt (author)Shadowfury2008-12-19

Lacking in detail? If you or anyone else want to do it another way, go right ahead.

thebboy (author)2008-09-06

That is awesome.

maggotmatt (author)thebboy2008-09-07

thank you.

thebboy (author)maggotmatt2008-09-07


thebboy (author)2008-09-06

what materials did you use for the handles?

maggotmatt (author)thebboy2008-09-07

i used a thick gage sheet metal.

thebboy (author)maggotmatt2008-09-07

where can i find something like that?

dannylee (author)2008-06-15

nice mate i am going to upload some of the knifes i made out of scrap metel :P

drummonkey92 (author)2008-06-06

nice job. what did you use as spacers between the two parts of the handle, also a pic of it closed up would be good

maggotmatt (author)drummonkey922008-06-07

i used normal washers. or if you dont have any the right size you could use 2 bolts as spacers

A good name (author)2008-06-07

Oh, I see you put a disclaimer, nevermind.

Mr. Rig It (author)2008-06-05

It looks like your knife came out pretty nice. However you need more work on your ible. Details make the Instructable, so to speak. Improved photos would also help as killerjackalope suggested. Proper capitalization in your sentences and your title. For example instead of "homemade butterfly knife" try "How to Make a Homemade Butterfly Knife". Knife looks nice though.

maggotmatt (author)Mr. Rig It2008-06-05

yeah. im not too worried about the capitalization and whatnot.

Mr. Rig It (author)maggotmatt2008-06-05

It is one of the reasons it isn't featured. Readers who do not yet have the advantage of knowing you will judge you by your writing. Pay some attention to what you say and how you say it.

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