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Recent content by RCarman

  1. RCarman

    Measuring straightness

    There are coordinate measuring machines that have sufficient accuracy to do what you want. There are commercial measuring services, so you don't have to buy a machine. Probably Mitutoyo, Zeiss, Leitz, and SIP at a minimum would make machines that could do it. A distance-measuring...
  2. RCarman

    Sharing the load- friction and dowel pins

    What I meant was that no other retention means was necessary for the pins. (A common design for tapered pins is to have a thread on the small end for retention.) We still use bolts to hold the item in question (i.e. gear rack) on the pins. This is to eliminate the risk that a lateral force...
  3. RCarman

    Sharing the load- friction and dowel pins

    Actually, this basic idea is commonly used on very large (~80 ton) machine tools to retain drive gears (racks and circular sectors) for high output feed drives. The difference is they use tapered pins, the holes for which are reamed at assembly, so there is no clearance to give problems. The...

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