I have a motor and some other components that move a machine vertical on the ground. Inside the machine i need to raise a part by 5 cm, up and down.

Are there some common patterns that can move objects vertically (lift) using technic lego? Torque comes from a motor powering gears.

  • It seems from your question that you want to convert a continuous circular motion from the motor into an up and down motion with a range of 5cm - is that correct?
    – 62Bricks
    Jul 26, 2013 at 16:43

2 Answers 2


You can use a mechanism like this:


This is a mechanism that converts circular motion into reciprocating motion. You may need to alter the design for your needs regarding height difference, stability etc.


You can accomplish this using gear racks (3743):

enter image description here

You just have to create some type of channel that allows the rack to slide vertically, and then set up a gear to mesh with the rack. You can do this however you like, but here's a quick example that I built to show you what I mean:

enter image description here

  • 1
    if only the gear racks weren't so hard to come across!
    – ACarter
    Sep 9, 2013 at 15:12
  • 3
    Indeed. They're fairly affordable on Bricklink, though: bricklink.com/search.asp?colorID=86&itemID=697
    – jncraton
    Sep 9, 2013 at 19:20
  • The gear racks were quite common on the early Technic cars with steering.
    – awe
    Aug 26, 2014 at 10:55

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.