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  • Users: kolvos
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  1. kolvos

    Flatness and parallelism dependability

    Hi, A very simple question. Is the picture attached sensible? (Parallelism of 0.05mm for surfaces that both have 0.05mm flatness tolerance) Either way - please try to explain why. http://files.engineering.com/getfile.aspx?folder=c22be41c-e1c1-4e73-bf93-49347073df69&file=Doc1.docx...
  2. kolvos

    Holes for countersunk screws

    Hi, This is a long time misunderstanding on my part.. If for instance I have an M3 DIN7991 screw - what are the dimensions needed for the countersunk part? same dimension as the head? i.e. 6mm x90 degrees? Thanks
  3. kolvos

    Indium as a Vacuum Seal - torque specification for screws

    Hi, We have a system that functions at ~10^-6 Torr. Two of the gaskets we use are an Indium wire of 1mm. One is 350mm in perimeter and one is 280mm. Both wires are in a standard gland, and are tightened with 8 NC10-24 screws. Currently there's no torque specification for these screws, and I'm...
  4. kolvos

    Mechanical engineering team management free software

    Hi, As the title says: Any recommendations for such a free software? Managing timelines, resources, priorities, etc.. Thanks!
  5. kolvos

    Tolerances for four accurate holes pointing at a finite virtual point

    Hi, I'm a bit confused as to how to define tolerances for four accurate holes pointing at a finite virtual point. (Picture attached) I'd also like that their depth will be toleranced between each other. What Linear and geometric tolerances should I define for such an application and how? I'm...

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