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    Discussion in 'Newsletters' started by GarethW, Dec 4, 2011.

    1. GarethW

      GarethW Chief Clicker Staff Member

      Jul 2009
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      Dear Forum members,

      We are pleased to announce a new Mechanical Design Forum prize draw! Courtesy of 3Dconnexion we’re giving away a SpaceMouse Pro – their NEWLY LAUNCHED product (RRP £249).

      Below is a pic of this fantastic prize. Please CLICK HERE for full details of how to win!


      Hot topics
      overspeed passed
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      M3 tapped holes - minimum pitch?
      I'm designing a part with lots of M3 tapped holes. Basically it's an aluminium block 20mm thick with lots of M3 holes on one face. What's the minimum pitch between M3 holes? Is there a standard somewhere? I have 2 annoying holes that need to be super-close!

      maxon motor problem
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      Good Enginerring Drawing book for beginer
      I am a recent mechanical engineering graduate and currently working as a design engineer in a metal fabricating company. I would like to understand more about engineering drawings and am wondering if someone could recommend me a good engineering drawing book for a beginer like me.

      Cool How can I calculate force required to destroy of a iron hollow cylinder?
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      Unanswered questions
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      Hyperstatic supported pipe The pipe is anchored at point A and simply supported at point C. The force FB represents the weight of the pipe and the force FD represents the half weight of a section of pipe (135'') continuing in Z......

      Question small motor shaft i have come across a problem. please help me in this. i have purchased a maxon motor whose shaft diameter is 1mm and its shaft length is 2.9mm. i have to mount a pinion of face width 4.5mm on it. now if i use it in same situation the pinion will act as cantilever beam whether or not? what should be alternate safe solution?

      Drill string design questions??? For my graded unit I have chosen to do a drill string design, just out of random with no prior knowledge in this field. Reason being is the aim of the unit is to test and also teach us how to apply what we are learning to the real world. I therefore have to make up a specification list that I think my client would present to me and then complete it.

      MEMS resonators I am trying to model a mems resonator using comsol software, and the core of the resonator is a Piezoelectric rectangular plate clamped at the center on either sides (center of the length). For our resonator to work, this structure must vibrate in contour or in plane mode with little or no out of plane deformation. What are the conditions for this to happen?? Also, can anyone please tell me how to calculate the vibrational fundamental modes or eigenfrequency for this structure?

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      Thanks to all for their contributions to the Knowledge Base!


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