Introduction: Knex Miter Saw

This is a miter saw I built for a contest. The blade spins and can cut paper. The best part about it is that the blade guard lifts up automatically as you push the saw down, just like the real thing. Plus, it's huge, heavy, and uses lots of flexi-rods. :-)

Here's how it works; when you push the saw down, fishing line gets reeled out in the back. A shaft turns, which is geared up so another shaft spins faster. Another strand of fishing line is attached to this shaft. When one strand of fishing line gets pulled out, another gets pulled in at a faster rate. One strand goes through the base and up into the saw, going through many wheels (yes, this was very hard to put through the wheels). There's also rubber bands that help reset everything.

Here are the instructions!

Here is the complete parts list, plus deconstruction pictures!

Here's the video:



Comments

author
random_builder (author)2017-02-14

This looks awesome!

author

Thanks man!

author
master-splinter306 (author)2015-11-01

Awesome!

author

Thanks!

author
LULUS (author)2013-01-03

cool

author
Shadowman39 (author)LULUS2013-01-03

Thanks!

author
CassisDude98 (author)2012-11-27

I managed to rebuild this thing exactly including the blade guard!

author
Shadowman39 (author)CassisDude982012-11-27

Cool! :-) Did construction go well?

author
dozer789 (author)2012-11-23

Very nice design, Keep up the great work! 5/5 stars!

author
Shadowman39 (author)dozer7892012-11-23

Thanks!

author
PotatoCoffee (author)2012-09-30

Put your finger under it! (I dare you).

author
Shadowman39 (author)PotatoCoffee2012-10-01

It wouldn't hurt :-P

author
PotatoCoffee (author)Shadowman392012-10-01

Well... BTW you're my 1500th commenter!

author
Shadowman39 (author)PotatoCoffee2012-10-02

Nice!

author
PotatoCoffee (author)Shadowman392012-10-02

=P

author
applesaucemodifier (author)2011-02-06

OH
MY
GOSH
That looks like it took a LONG time.

author

Thanks! It only took 2 days. :-)

author

2 days..
then why don't you rebuild and post it?

author

I don't have any white rods, I ran out of them on my current project. I bought 1000 from ebay, but I have to return them because they were dirty and discolored. :-(

author

ok but wil you ever post this?

author
bilaliscool (author)2012-03-25

wow!
nice thing!

author
Shadowman39 (author)bilaliscool2012-03-25

Thanks!

author
DontShoot262 (author)2011-04-18

This thing is AWSOME!!!!!!!!5*

author
Shadowman39 (author)DontShoot2622011-04-19

Thanks!

author
videogamemaster (author)2011-03-23

Ho. Lee. Crap.

This thing is a BEAST. Have you ever tried cutting anything stronger then paper, like cardboard? Or a finger........ What! You got ten of 'em...... Lol, just kidding.

author

Thanks! I highly doubt it would have cut anything thicker than paper.

author

Your welcome :)

Have you ever thought about using something more powerful for the motor, like, say, a drill?

author

I never thought about using a drill, but I rather use a different motor, like a motor to a weed eater. :-)

author

Or a chainsaw! Heh heh, that saw would going at like 1,000 RPS!!

But, a weed eater is good, too. I bet you could also sharpen the pieces a little bit more.

Not to ruin your 'ible or anything. Just trying to give you ideas to see if you could make it better.

author
danicle (author)2011-03-06

5*! You should have shown it cutting through something though. Still, this is epic!!!

author
Shadowman39 (author)danicle2011-03-09

Thanks! I never thought of showing it cutting something in the video.

author
coolman56 (author)2011-03-03

thats really cool!thats cool as !$@$

author
Shadowman39 (author)coolman562011-03-03

Thanks!

author
jimopertrat (author)2011-02-17

This is so cool!!=D (WAAAYYYY better than mine!!=D)

author
Shadowman39 (author)jimopertrat2011-02-17

Thanks!

author
jimopertrat (author)Shadowman392011-02-18

np=D

author
norton220 (author)2011-02-15

:O oh buddy this thing is awesome!!!!! i was just about to design one when i seen yours. Great Job, i'm going to try and make one that angles and bevels. 5* keep up the good work!!

author
Shadowman39 (author)norton2202011-02-15

Thanks!

author
Matrix-technician (author)2011-02-11

Cool. Maybe you could add a k'nex motor with a placeable power switch so that the switch is activated when you lower the saw turning the blade? 5* keep up the good work!

author

Thanks, that's a good idea.

author
bacp03 (author)2011-02-02

could you try to rebuild it than post it

author
CraigDH (author)2011-01-31

Will you be posting?

author
Shadowman39 (author)CraigDH2011-01-31

No, this is long gone. Sorry.

author
CraigDH (author)Shadowman392011-02-01

ok

author
Randomguy65 (author)2011-01-29

WTF. I can't believe I didn't comment on this, excellent job as always buddy. :-)

author
Shadowman39 (author)Randomguy652011-01-30

Lol, thanks!

author
Randomguy65 (author)Shadowman392011-01-30

:-)

author
SomeAsianKid (author)2011-01-27

Pro :D Does it cut anything:P

author
Shadowman39 (author)SomeAsianKid2011-01-27

Thanks, it cut paper.

author
SomeAsianKid (author)Shadowman392011-01-28

Lol cool

About This Instructable

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Bio: On my page you'll find lots of different Knex projects, from ball machine lifts to useful items. I hope you enjoy!  _______________________ Current avatar ... More »
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