Answers.Body: <p>I'd like to cover two other techniques that work well, they both transmit horizontal torque to vertical but in slightly different ways that I believe may be useful for different situations.</p>
  <hr />
  <h2>Worm Gears</h2>
  <p><a href="https://i.sstatic.net/dcdL2.png" rel="noreferrer"><img src="https://i.sstatic.net/dcdL2.png" alt="Worm Gear Illustration" /></a></p>
  <p>Worm gears are fairly small (less than two studs long). Worm gears are designed to be operated in one direction and can only be driven by the axle with the worm gear. You can get some very high gear ratios when combining a worm gear with another gear.</p>
  <h2>Knob Wheel</h2>
  <p><a href="https://i.sstatic.net/5fPNz.png" rel="noreferrer"><img src="https://i.sstatic.net/5fPNz.png" alt="Knob Wheel Illustration" /></a></p>
  <p>Knob wheels are only compatible with other knob wheels, they cannot be used with gears. They can be used parallel (like standard gears) and at 90 degree angles (like crown/bevel gears).</p>
  <p>I find knob gears are easier and more comfortable to turn by hand and they appear to be more commonly included with recent Technic sets.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2015-05-27T21:09:51.597Z
Answers.LastActivityDate: 2021-04-01T02:08:49.287Z
Answers.LastEditDate: 2021-04-01T02:08:49.287Z
Answers.UserDisplayName: Ambo100
Answers.Body: <p>There are a number of ways to do this. Here is one of the easiest and earliest methods:</p>
  <p><img src="https://i.sstatic.net/cndIf.png" alt="gear box" /></p>
  <p>For that design, you'll need this part (<a href="http://brickset.com/parts/?part=4211434" rel="nofollow noreferrer">3650</a>):</p>
  <p><img src="https://i.sstatic.net/jwlAj.jpg" alt="crown gear" /></p>
  <p>And one of the 8-tooth gear variants:</p>
  <p><a href="https://i.sstatic.net/ZQGM8.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ZQGM8.png" alt="8-tooth gear variants" /></a></p>
  <p>You'll also need suitable <a href="https://rebrickable.com/parts/technic-axles/" rel="nofollow noreferrer">Technic axles</a>, Technic bricks (<a href="https://rebrickable.com/parts/3700" rel="nofollow noreferrer">3700</a> is used above), and Technic plates (<a href="https://rebrickable.com/parts/32001" rel="nofollow noreferrer">32001</a> in the example) to match your overall design needs.</p>
  <p>You can also do something similar using a combination of bevel gears or double bevel gears:</p>
  <p><img src="https://i.sstatic.net/YZcg5.jpg" alt="bevel gear" />
  <img src="https://i.sstatic.net/3DxGt.jpg" alt="double bevel gear" /></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-05-24T01:52:40.440Z
Answers.Text: Don’t suppose you can identify all the bricks in the top photo please
Answers.UserDisplayName: mark lowns
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-05-24T14:30:58.637Z
Answers.Text: @marklowns I've updated my answer with part numbers and links to appropriate parts.
Answers.UserDisplayName: jncraton
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2013-06-29T00:12:55.773Z
Answers.LastActivityDate: 2023-05-24T14:30:27.240Z
Answers.LastEditDate: 2023-05-24T14:30:27.240Z
Answers.UserDisplayName: jncraton
Body: <p>I have a setup where I have a step motor which I am attaching a gear onto. The motor will make the gear stand horizontal in a small vehicle. Is there any good gear combinations of LEGO gears that can transform the  horizontal torque of the gear into vertical torque that drives the wheels of the small car I am building?</p>
  
  <p>Are there multiple combinations of LEGO gears that can provide this kind of torque transmission? </p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-06-29T08:33:48.367Z
Comments.Text: you may want to omit the "gluing" part - it may have people flee in disgust and it's not really relevant to the question anyway
Comments.UserDisplayName: Joubarc
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-06-29T08:35:14.277Z
Comments.Text: @Joubarc Thanks for the comment, i am doing it since regular stepper motors powered by an arduino needs to have a "starting" lego brick attached to their rod that spins
Comments.UserDisplayName: bogen
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-06-29T08:43:18.353Z
Comments.Text: That said, this question is very similar, if not a full duplicate, of [Strongest gear configuration](http://bricks.stackexchange.com/q/2023/99)
Comments.UserDisplayName: Joubarc
Tags: <motor><gears>
Title: How can I transmit horizontal torque to vertical?
UserDisplayName: bogen
ThreadText: # How can I transmit horizontal torque to vertical?
  
  (Asked by: username_0 on 2013-06-28)
  
  I have a setup where I have a step motor which I am attaching a gear onto. The motor will make the gear stand horizontal in a small vehicle. Is there any good gear combinations of LEGO gears that can transform the horizontal torque of the gear into vertical torque that drives the wheels of the small car I am building?
  
  Are there multiple combinations of LEGO gears that can provide this kind of torque transmission?
  
  **Tags:** motor, gears
  > **Comments:**
  > **username_1**: you may want to omit the "gluing" part - it may have people flee in disgust and it's not really relevant to the question anyway  
  > **username_0**: @Joubarc Thanks for the comment, i am doing it since regular stepper motors powered by an arduino needs to have a "starting" lego brick attached to their rod that spins  
  > **username_1**: That said, this question is very similar, if not a full duplicate, of [Strongest gear configuration](http://bricks.stackexchange.com/q/2023/99)  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2013-06-29. Score: 11 | Accepted answer
  
  There are a number of ways to do this. Here is one of the easiest and earliest methods:
  
  ![gear box](https://i.sstatic.net/cndIf.png)
  
  For that design, you'll need this part ([3650](http://brickset.com/parts/?part=4211434)):
  
  ![crown gear](https://i.sstatic.net/jwlAj.jpg)
  
  And one of the 8-tooth gear variants:
  
  [![8-tooth gear variants](https://i.sstatic.net/ZQGM8.png)](https://i.sstatic.net/ZQGM8.png)
  
  You'll also need suitable [Technic axles](https://rebrickable.com/parts/technic-axles/), Technic bricks ([3700](https://rebrickable.com/parts/3700) is used above), and Technic plates ([32001](https://rebrickable.com/parts/32001) in the example) to match your overall design needs.
  
  You can also do something similar using a combination of bevel gears or double bevel gears:
  
  ![bevel gear](https://i.sstatic.net/YZcg5.jpg)
  ![double bevel gear](https://i.sstatic.net/3DxGt.jpg)
  
  > **Comments:**
  > **username_4**: Don’t suppose you can identify all the bricks in the top photo please  
  > **username_3**: @marklowns I've updated my answer with part numbers and links to appropriate parts.  
  
  ---
  
  ### Answer by username_2 on 2015-05-27. Score: 10
  
  I'd like to cover two other techniques that work well, they both transmit horizontal torque to vertical but in slightly different ways that I believe may be useful for different situations.
  
  ---
  
  ## Worm Gears
  
  [![Worm Gear Illustration](https://i.sstatic.net/dcdL2.png)](https://i.sstatic.net/dcdL2.png)
  
  Worm gears are fairly small (less than two studs long). Worm gears are designed to be operated in one direction and can only be driven by the axle with the worm gear. You can get some very high gear ratios when combining a worm gear with another gear.
  
  ## Knob Wheel
  
  [![Knob Wheel Illustration](https://i.sstatic.net/5fPNz.png)](https://i.sstatic.net/5fPNz.png)
  
  Knob wheels are only compatible with other knob wheels, they cannot be used with gears. They can be used parallel (like standard gears) and at 90 degree angles (like crown/bevel gears).
  
  I find knob gears are easier and more comfortable to turn by hand and they appear to be more commonly included with recent Technic sets.
  
  
  ---
  
  