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 made it!(author)2017-02-14

This looks awesome!

author
Shadowman39 made it!(author)2017-02-16

Thanks man!

author
master-splinter306 made it!(author)2015-11-01

Awesome!

author
Shadowman39 made it!(author)2016-06-27

Thanks!

author
LULUS made it!(author)2013-01-03

cool

author
Shadowman39 made it!(author)2013-01-03

Thanks!

author
CassisDude98 made it!(author)2012-11-27

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

author
Shadowman39 made it!(author)2012-11-27

Cool! :-) Did construction go well?

author
dozer789 made it!(author)2012-11-23

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

author
Shadowman39 made it!(author)2012-11-23

Thanks!

author
PotatoCoffee made it!(author)2012-09-30

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

author
Shadowman39 made it!(author)2012-10-01

It wouldn't hurt :-P

author
PotatoCoffee made it!(author)2012-10-01

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

author
Shadowman39 made it!(author)2012-10-02

Nice!

author
PotatoCoffee made it!(author)2012-10-02

=P

author
applesaucemodifier made it!(author)2011-02-06

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

author
Shadowman39 made it!(author)2011-02-07

Thanks! It only took 2 days. :-)

author
guitarshredder123 made it!(author)2012-07-08

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

author
Shadowman39 made it!(author)2012-07-08

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
guitarshredder123 made it!(author)2012-07-08

ok but wil you ever post this?

author
bilaliscool made it!(author)2012-03-25

wow!
nice thing!

author
Shadowman39 made it!(author)2012-03-25

Thanks!

author
DontShoot262 made it!(author)2011-04-18

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

author
Shadowman39 made it!(author)2011-04-19

Thanks!

author
videogamemaster made it!(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
Shadowman39 made it!(author)2011-03-25

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

author
videogamemaster made it!(author)2011-03-25

Your welcome :)

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

author
Shadowman39 made it!(author)2011-03-26

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

author
videogamemaster made it!(author)2011-03-26

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 made it!(author)2011-03-06

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

author
Shadowman39 made it!(author)2011-03-09

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

author
coolman56 made it!(author)2011-03-03

thats really cool!thats cool as !$@$

author
Shadowman39 made it!(author)2011-03-03

Thanks!

author
jimopertrat made it!(author)2011-02-17

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

author
Shadowman39 made it!(author)2011-02-17

Thanks!

author
jimopertrat made it!(author)2011-02-18

np=D

author
norton220 made it!(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 made it!(author)2011-02-15

Thanks!

author
Matrix-technician made it!(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
Shadowman39 made it!(author)2011-02-12

Thanks, that's a good idea.

author
bacp03 made it!(author)2011-02-02

could you try to rebuild it than post it

author
CraigDH made it!(author)2011-01-31

Will you be posting?

author
Shadowman39 made it!(author)2011-01-31

No, this is long gone. Sorry.

author
CraigDH made it!(author)2011-02-01

ok

author
Randomguy65 made it!(author)2011-01-29

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

author
Shadowman39 made it!(author)2011-01-30

Lol, thanks!

author
Randomguy65 made it!(author)2011-01-30

:-)

author
SomeAsianKid made it!(author)2011-01-27

Pro :D Does it cut anything:P

author
Shadowman39 made it!(author)2011-01-27

Thanks, it cut paper.

author
SomeAsianKid made it!(author)2011-01-28

Lol cool

About This Instructable

9,273views

21favorites

License:

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 »
More by Shadowman39:Knex Vertical Jigsaw LiftCitadel Knex Ball Machine Elements - InstructionsCitadel Knex Ball Machine
Add instructable to: