Answers.Body: <p>Had to buy one to check the specs. The Bore size is just under 4 mm (~3.5 mm) in diameter. Without the teeth of the clutch it is just under 5 mm.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-03T17:42:20.410Z
Answers.LastActivityDate: 2019-07-03T17:42:20.410Z
Answers.UserDisplayName: Alrawi
Answers.Body: <p>Outer (hub): 6.8 mm/.268 in./ 17/64 in.<br>
  Inner (shaft): 4.9 mm/ .193 in./ 25/128 in.<br>
  Teeth (key): 3.32 mm/ .1305 in./ 17/128 in. </p>
  
  <p>-These are close/approximate, not exact due to the tolerances and/or wear. I measured 4 different gears with a digital caliper and the measurements were all within .10 mm of the listed measurements. The measurements even varied slightly within a single gear depending on side and orientation.  </p>
  
  <p>Also, I think you can find the answer to your second question about pitch here: "<a href="https://bricks.stackexchange.com/questions/6550/what-is-the-module-of-a-lego-gear">What is the &quot;Module&quot; of a LEGO gear?</a>"  </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-01T16:15:16.800Z
Answers.LastActivityDate: 2019-07-12T10:54:51.127Z
Answers.LastEditDate: 2019-07-12T10:54:51.127Z
Answers.UserDisplayName: JohnnyB
Body: <p>I was wondering what the bore size is off the 60C01 clutch gear as I was unable to find it anywhere. Also, what is the pitch of such gear?</p>
  
  <p><img src="https://i.sstatic.net/QWmOP.jpg" alt="enter image description here"></p>
  
Tags: <technic><gears><size>
Title: Lego Technic 60C01 Clutch Gear Bore size
UserDisplayName: Alrawi
ThreadText: # Lego Technic 60C01 Clutch Gear Bore size
  
  (Asked by: username_0 on 2019-06-24)
  
  I was wondering what the bore size is off the 60C01 clutch gear as I was unable to find it anywhere. Also, what is the pitch of such gear?
  
  ![enter image description here](https://i.sstatic.net/QWmOP.jpg)
  
  **Tags:** technic, gears, size
  
  
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  ## 2 answers
  
  ### Answer by username_0 on 2019-07-03. Score: -1 | Accepted answer
  
  Had to buy one to check the specs. The Bore size is just under 4 mm (~3.5 mm) in diameter. Without the teeth of the clutch it is just under 5 mm.
  
  
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  ### Answer by username_1 on 2019-07-01. Score: 3
  
  Outer (hub): 6.8 mm/.268 in./ 17/64 in.  
  Inner (shaft): 4.9 mm/ .193 in./ 25/128 in.  
  Teeth (key): 3.32 mm/ .1305 in./ 17/128 in.
  
  -These are close/approximate, not exact due to the tolerances and/or wear. I measured 4 different gears with a digital caliper and the measurements were all within .10 mm of the listed measurements. The measurements even varied slightly within a single gear depending on side and orientation.
  
  Also, I think you can find the answer to your second question about pitch here: "[What is the "Module" of a LEGO gear?](https://bricks.stackexchange.com/questions/6550/what-is-the-module-of-a-lego-gear)"
  
  
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