Answers.Body: <p>I did find this pattern for a 3-D printer.</p>
  <p><a href="https://www.cgtrader.com/free-3d-print-models/hobby-diy/mechanical-parts/6mm-dshaft-to-lego-axis-adapter" rel="nofollow noreferrer">https://www.cgtrader.com/free-3d-print-models/hobby-diy/mechanical-parts/6mm-dshaft-to-lego-axis-adapter</a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-05-30T10:06:10.147Z
Answers.LastActivityDate: 2022-05-30T10:06:10.147Z
Answers.UserDisplayName: Gary Kindel
Answers.Body: <p>For 6 mm shaft the hole used to accept LEGO Technic axle is slightly less in diameter than 6 mm. So you may try modifying one end of of Technic connectors (some examples below) to fit the motor shaft and use usual Technic axle on the other end of connector.</p>
  <p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538c#T=C" rel="nofollow noreferrer">6538c - Technic, Axle Connector 2L (Smooth with x Hole + Orientation)</a></p>
  <p><a href="https://i.sstatic.net/1Zx6e.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/1Zx6e.png" alt="enter image description here" /></a></p>
  <p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538b#T=C" rel="nofollow noreferrer">6538b - Technic, Axle Connector 2L (Ridged with x Hole x Orientation)</a></p>
  <p><a href="https://i.sstatic.net/5vj5q.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/5vj5q.png" alt="enter image description here" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-05-30T15:39:23.813Z
Answers.LastActivityDate: 2022-05-30T15:39:23.813Z
Answers.UserDisplayName: Alex
Body: <p>How can I connect a 4mm or 6mm stepper motor D shaft to an old Technic gear?</p>
  <p>I would like to mount an old 8-tooth gear to a 4-6 mm diameter stepper motor shaft.</p>
  <p>Lego part: <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=3647#T=S&amp;O=%7B%22iconly%22:0%7D" rel="nofollow noreferrer">3647</a>:</p>
  <p><a href="https://i.sstatic.net/Yo7W3.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Yo7W3.png" alt="3647" /></a></p>
  <p><a href="https://www.pololu.com/product/2256" rel="nofollow noreferrer">Stepper motor</a>:</p>
  <p><a href="https://i.sstatic.net/DkS1Y.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/DkS1Y.jpg" alt="Electric motor" /></a></p>
  <p>Potential solution found on 3<a href="https://3dprinting.stackexchange.com/questions/19522/stepper-motor-d-shaft-to-lego-axle-adapter">D Printing StackExchange</a>.</p>
  <p>Working solution:
  <a href="https://i.sstatic.net/Ik4AV.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Ik4AV.jpg" alt="enter image description here" /></a></p>
  
Tags: <technic><motor><gears><3rd-party><connections>
Title: How can I connect a 4mm Stepper motor shaft to a technic gear?
UserDisplayName: Gary Kindel
ThreadText: # How can I connect a 4mm Stepper motor shaft to a technic gear?
  
  (Asked by: username_0 on 2022-05-29)
  
  How can I connect a 4mm or 6mm stepper motor D shaft to an old Technic gear?
  
  I would like to mount an old 8-tooth gear to a 4-6 mm diameter stepper motor shaft.
  
  Lego part: [3647](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3647#T=S&O=%7B%22iconly%22:0%7D):
  
  [![3647](https://i.sstatic.net/Yo7W3.png)](https://i.sstatic.net/Yo7W3.png)
  
  [Stepper motor](https://www.pololu.com/product/2256):
  
  [![Electric motor](https://i.sstatic.net/DkS1Y.jpg)](https://i.sstatic.net/DkS1Y.jpg)
  
  Potential solution found on 3[D Printing StackExchange](https://3dprinting.stackexchange.com/questions/19522/stepper-motor-d-shaft-to-lego-axle-adapter).
  
  Working solution:
  [![enter image description here](https://i.sstatic.net/Ik4AV.jpg)](https://i.sstatic.net/Ik4AV.jpg)
  
  **Tags:** technic, motor, gears, 3rd-party, connections
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_0 on 2022-05-30. Score: 4
  
  I did find this pattern for a 3-D printer.
  
  <https://www.cgtrader.com/free-3d-print-models/hobby-diy/mechanical-parts/6mm-dshaft-to-lego-axis-adapter>
  
  
  ---
  
  ### Answer by username_1 on 2022-05-30. Score: 4
  
  For 6 mm shaft the hole used to accept LEGO Technic axle is slightly less in diameter than 6 mm. So you may try modifying one end of of Technic connectors (some examples below) to fit the motor shaft and use usual Technic axle on the other end of connector.
  
  [6538c - Technic, Axle Connector 2L (Smooth with x Hole + Orientation)](https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538c#T=C)
  
  [![enter image description here](https://i.sstatic.net/1Zx6e.png)](https://i.sstatic.net/1Zx6e.png)
  
  [6538b - Technic, Axle Connector 2L (Ridged with x Hole x Orientation)](https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538b#T=C)
  
  [![enter image description here](https://i.sstatic.net/5vj5q.png)](https://i.sstatic.net/5vj5q.png)
  
  
  ---
  
  