Answers.Body: <p>It sounds like you need a stronger differential.</p>
  
  <p>Might I suggest <a href="http://www.brickshelf.com/cgi-bin/gallery.cgi?f=508104" rel="nofollow noreferrer">this design by Nazgarot</a>:</p>
  
  <p><a href="https://i.sstatic.net/mUAFz.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/mUAFz.png" alt="enter image description here"></a></p>
  
  <p>If you make two, you can build a big and sturdy subtractor like this (probably customizing the gear ratios to your requirements, the right gearing could also remove the need for a PF switch):</p>
  
  <p><a href="https://i.sstatic.net/iRdt1.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/iRdt1.jpg" alt="enter image description here"></a></p>
  
  <p><a href="https://i.sstatic.net/dLFHY.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/dLFHY.jpg" alt="enter image description here"></a></p>
  
  <p><a href="https://i.sstatic.net/c66Ls.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/c66Ls.jpg" alt="enter image description here"></a></p>
  
  <p>Here's a video of it in action:</p>
  
  <p><a href="https://www.youtube.com/watch?v=qndQNgcSKgE" rel="nofollow noreferrer"><img src="https://i.sstatic.net/DNHEH.jpg" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-13T02:58:31.710Z
Answers.Text: Very nice answer. You deserve to get the six-sided hat for this. :)
Answers.UserDisplayName: jncraton
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-13T15:06:46.663Z
Answers.Text: Excellent. I've come back to this question like 4 times hoping someone had finally figured out a decent answer.
Answers.UserDisplayName: MindS1
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-13T01:40:28.237Z
Answers.LastActivityDate: 2018-12-20T19:04:17.947Z
Answers.LastEditDate: 2018-12-20T19:04:17.947Z
Answers.UserDisplayName: Alexander O'Mara
Body: <p>I would like to use a subtractor in my next RC LEGO tank, as it enables the vehicle to turn on the move, as opposed to stopping and then turning.</p>
  
  <p>Unfortunately, the subtractors I have tested so far cannot withstand the torque of heavy vehicles, which either causes the subtractor to break apart, or the differentials/gears to grind.</p>
  
  <p>Does anyone know any subtractor designs which are able to deal with high tension/torque/stress levels so that enormous vehicles can still use them? 3kg-5kg tolerance would be ideal.</p>
  
Tags: <technic><gears><mechanical>
Title: High Torque Subtractors
UserDisplayName: Nick Barham
ThreadText: # High Torque Subtractors
  
  (Asked by: username_0 on 2018-04-13)
  
  I would like to use a subtractor in my next RC LEGO tank, as it enables the vehicle to turn on the move, as opposed to stopping and then turning.
  
  Unfortunately, the subtractors I have tested so far cannot withstand the torque of heavy vehicles, which either causes the subtractor to break apart, or the differentials/gears to grind.
  
  Does anyone know any subtractor designs which are able to deal with high tension/torque/stress levels so that enormous vehicles can still use them? 3kg-5kg tolerance would be ideal.
  
  **Tags:** technic, gears, mechanical
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-12-13. Score: 6
  
  It sounds like you need a stronger differential.
  
  Might I suggest [this design by Nazgarot](http://www.brickshelf.com/cgi-bin/gallery.cgi?f=508104):
  
  [![enter image description here](https://i.sstatic.net/mUAFz.png)](https://i.sstatic.net/mUAFz.png)
  
  If you make two, you can build a big and sturdy subtractor like this (probably customizing the gear ratios to your requirements, the right gearing could also remove the need for a PF switch):
  
  [![enter image description here](https://i.sstatic.net/iRdt1.jpg)](https://i.sstatic.net/iRdt1.jpg)
  
  [![enter image description here](https://i.sstatic.net/dLFHY.jpg)](https://i.sstatic.net/dLFHY.jpg)
  
  [![enter image description here](https://i.sstatic.net/c66Ls.jpg)](https://i.sstatic.net/c66Ls.jpg)
  
  Here's a video of it in action:
  
  [![enter image description here](https://i.sstatic.net/DNHEH.jpg)](https://www.youtube.com/watch?v=qndQNgcSKgE)
  
  > **Comments:**
  > **username_2**: Very nice answer. You deserve to get the six-sided hat for this. :)  
  > **username_3**: Excellent. I've come back to this question like 4 times hoping someone had finally figured out a decent answer.  
  
  ---
  
  