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  1. John Donlan

    Sheet metal die cost reduction

    Malek, I am no expert on either laser machining or CNC punch machining. My experience is in metal cutting (manual and CNC lathes, milling machines, screw machines). That being said, I'm not sure which of the different processes would work out for you economically.... But I think you should give...
  2. John Donlan

    machined PVC with groove = bending/warping problems

    Perhaps if you started with a greatly oversized piece of extruded stock, so that you would have the allowance of a lot of material to remove when the internal stress has started relieving themselves. Possibly another alternative would be if you could obtain PVC that was cast (not extruded) it...
  3. John Donlan

    Machine tool question

    I would like to put my two cents in. I understand that you may need to improvise a makeshift press sometimes (if one is not available) and a machining center spindle looks like it might fit the bill. I don't think it would work well and this is why... Yes, a machining center spindle is able to...
  4. John Donlan

    Press fit a steel pin into aluminum

    I think the use of loctite or any other adhesion substance in securing a steel dowel pin in aluminum is totally conditional upon the environment under which this joinery will be exposed. Personally, I think an interference press fit is always better than adhesion with glue in a slip fit...
  5. John Donlan

    That's my fellow manufacturing engi

    Thank you very much for your suggestion! I'll check it out.
  6. John Donlan

    That's my fellow manufacturing engi

    That's my fellow manufacturing engineers know, when you haven't solved a problem... Even after many years... It's still begs for a solution in your mind. I would gladly appreciate your help and advice with this problem. It's been many years (1983 - 1984) since I've written programs to turn...

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