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October 12th, 2009 Leave a comment Go to comments

Functional model of a chainsaw. Features on/off trigger and an integrated speed control.


Completion date: 01/10/2009
Power: electric (Power Functions)
Dimensions:  length 58 studs / width 16 studs / height 21 studs
Weight: 0.615 kg
Motors: 1x PF Medium

A completely spontaneous and unplanned construction. I wanted to make a model of a regular chainsaw for some time, but I didn’t have any idea on how to build the blade until recently. When I got the blade to work, the rest followed in just a couple of days.

The blade is basically a 1 stud thick layer of bricks. On the tip of it, there is a 40t gear with no apparent means of support. Between it and the blade, there are two freely rotating 8t gears that let the 40t gear roll on them. The 40t gear is pushed against the 8t gears by the chain – so basically the whole blade is kept together by the tightness of the chain.

The saw is loosely modeled after some standard Husqvarna machine. I did not calculate its dimensions, it was built just roughly. Inside the saw, there is a single PF Medium motor powered by the Lego battery. The battery can be turned on or off by a trigger inside the saw’s rear handle. The speed control system implemented in the battery is utilized as well – the speed can be controlled by a lower grey gear on the saw’s side (the upper gear is just a mock-up). The saw was extremely fun to build, but doesn’t really cut well. Firstly the plastic chain was simply unfit for cutting, and secondly it tended to come apart when pushed against some hard surface, which resulted in the 40t gear falling off immediately.


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Categories: Misc. Tags:
  1. tyler
    April 13th, 2012 at 16:59 | #1

    ilove the chainsaw its unique and kool!!!

  2. December 14th, 2011 at 06:29 | #2

    I really liked this enough to make my own it’s cool too

  3. Sariel
    November 15th, 2011 at 21:19 | #3

    Doom 3 menu theme.

  4. FeroxVII
    November 15th, 2011 at 19:04 | #4

    @Sariel great build, what song did you use in your youtube video for this? your stuff is amazing to say the least

  5. Bob
    November 15th, 2011 at 10:22 | #5

    You still need to, at the very least, learn how to actually hold one 😛

  6. jerkerhead
    October 31st, 2011 at 04:36 | #6

    wait forget i said that and by the way sick model

  7. jerkerhead
    October 31st, 2011 at 04:27 | #7

    do you think you will start making instructions like nico71 does

  8. Sariel
    January 17th, 2011 at 22:45 | #8
  9. johnny nashawaty
    January 17th, 2011 at 20:24 | #9

    hey could you make a vid totorial of how to make it

  10. Sariel
    January 16th, 2010 at 17:13 | #10

    Who would count that?

  11. gimba96
    January 16th, 2010 at 15:25 | #11

    how many pieces o chain have you used?

  12. December 28th, 2009 at 03:53 | #12

    When I was 9 I would have tried to cut my sisters up in tiny pieces and probably came after Paul because it wouldn’t cut, NO BLOOD. Builders !!! Don’t try this at home…while your parents are around. Hehehaha

  13. jack w
    December 2nd, 2009 at 12:44 | #13

    BELT SANDER! then you can race it!

  14. November 11th, 2009 at 22:45 | #14

    Get out of town. Looks so real. Can’t wait to show this to my cousin. He will freak out.

  15. NxT bUiLdEr
    October 25th, 2009 at 14:32 | #15

    and its heavy too

  16. RjbsNXT
    October 22nd, 2009 at 20:52 | #16

    @NxT bUiLdEr
    The only thing with NXT is the fact that the NXT Brick is so hugh – I’m building something at the moment and without the NXT I would have no problem building it, although I need it to control 3 extra motors and the PFs with my other NXT as a remote control.

    Overall, it works well if you have room for it.

  17. Sariel
    October 22nd, 2009 at 07:57 | #17

    @NxT bUiLdEr
    I don’t know, really.

  18. NxT bUiLdEr
    October 22nd, 2009 at 02:06 | #18

    i am building with lego mindstorms and you should try it! but do you think you can help me with my every day legoing? (sorry my “i’s” aren’t capitalized)

  19. RjbsNXT
    October 18th, 2009 at 16:15 | #19


  20. legokid
    October 18th, 2009 at 16:08 | #20

    Hey what dos misc. meam?

  21. Sariel
    October 15th, 2009 at 20:25 | #21

    No, I just have strong associations between chainsaws and blood 🙂

  22. bobsurankle
    October 15th, 2009 at 19:21 | #22

    Wow, fantastic. But did you really have to put all that blood every where?

  23. Sariel
    October 15th, 2009 at 15:57 | #23

    Yeah, I guess so. Only after this one was complete I realized how little I know about chainsaws 🙂

  24. Murcielago53
    October 15th, 2009 at 04:04 | #24

    Anyway you could hook it up so that the trigger isn’t an off/on switch, so when you hold on the trigger the chain runs, and when you release, it stops. This is more realistic, and more fun for revving.
    Amazing job, the aesthetics are great and its functions are impressive, especially the speed dial, you always half to go the extra step, eh?

  25. André
    October 13th, 2009 at 19:47 | #25

    Men you are the BEST.
    Great imagination…..

  26. sverre
    October 13th, 2009 at 10:55 | #26

    Really nice looking. I like it alot.

  27. October 12th, 2009 at 17:35 | #27

    Fond memories of Doom chainsaw… ;o)

  28. David Luders
    October 12th, 2009 at 17:07 | #28

    With Halloween coming up in 3 weeks, don’t let any Bionicle creatures see you with this chainsaw! They’ll freak out! 🙂

  29. legobuilder
    October 12th, 2009 at 16:12 | #29

    lol very nice saw but a little bit n00b

  30. kama12811
    October 12th, 2009 at 16:05 | #30

    łał pierwszy raz widzę coś takiego!Gratulacje za pomysłowość

  31. Boris
    October 12th, 2009 at 15:48 | #31

    I already commented on the video on youtube as v4trogaSci =D
    But still, I can’t resist saying that it looks great, and the details are cool, even if it is a “roughly” built chainsaw. =D

  32. Sariel
    October 12th, 2009 at 07:46 | #32

    I didn’t count but it’s probably over 100 chain links.

  33. icanhaslego
    October 12th, 2009 at 06:59 | #33

    try cutting styrofoam

  34. RjbsNXT
    October 12th, 2009 at 00:30 | #34

    I love the design and its realistic look :O
    How many chain links were used??

    Also I like the way you used the speed control on the new rechargeable battery pack .. very clever 🙂

    I know you’re good with photo editing but the blood and hand prints on the chainsaw is ingenious 😉


  1. November 15th, 2011 at 02:56 | #1
  2. November 20th, 2011 at 08:34 | #2
  3. December 24th, 2011 at 11:19 | #3
  4. January 4th, 2012 at 17:28 | #4
  5. January 5th, 2012 at 23:10 | #5