Instructables

How to Build a Lego(R) Chainsaw

Having seen a 'chainsaw' instructable which was not a chainsaw, I started thinking. I had some Lego bits, including:

A motor (4.5v)
Some gear wheels
Some chain links
And some other general bits.

These parts are required, as pictured.

The tricky part was the saw teeth...
 
Remove these adsRemove these ads by Signing Up

Step 1: Saw Teeth

These are the most tricky part, which is why I started on them first.

If you examine Lego chain-links, you will see that they interlock with pins spaced 6.5mm apart. There's enough clearence to get something very thin between the joints to be fixed on the same pins:

Aluminium beer-can, easily cut with scissors & sharp knives (do be careful).

Tools:
A hammer
A knife blade
A piece of stiff wire (from an umbrella)
A picture nail
An abrasive stick (coarse corundum, probably)
A piece of wood

Please view the pictures for the method.

Step 3: And the rest

DSCF60.JPG
DSCF65.JPG
I'm not going into details, this part is relatively easy.
The pictures should give you enough information.
I started with a direct-drive from the motor pinion, but later geared-down (intro picture). However, direct-drive off the motor works best.
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!