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Recent content by var10

  1. var10

    Batch No and Retail Price Printer attachment for an existing packing machine

    Hi We have a very old packing machine (form filling machine) to fill 5gms sachets. We purchased this second hand. We need an attachment kind of a thing which can be welded or bolted on to the machine so when the 5gms sachets are packed and exit the machine I want another process where the batch...
  2. var10

    Failure Load Calculations

    thanks guys. That was the table that I used too. Cheers!
  3. var10

    Failure Load Calculations

    Hi desert fox. Based on the table in that site, the allowable shear load on an M4 screw with medium carbon steel is about 150 kg. Can you achieve this on hand tightening or during tightening? I thought they did mean thats static loading scenarios. Can you please share the link where you think I...
  4. var10

    Failure Load Calculations

    http://www.roymech.co.uk/Useful_Tables/Screws/Thread_Calcs.html Not completely sure if this Tensile area is applicable for any length of the screw. Help and advice please!
  5. var10

    Failure Load Calculations

    thanks guys. @ TLHS - It will be used more than thousand times if not more in its life cycle. I am pretty sure they are well equipped for the load all except screws which are the limiting factors. Yeah I was also leaning towards using Yield Stress as it is a bit more safer and you identify...
  6. var10

    Failure Load Calculations

    thanks desertfox. The load is just around 50kg applied and in one case there could be this shear load on 2 screws. All other parts are very well within the allowable range. Worst case will be screws fail due to shear. Since there is no perfect way to calculate shear, I am assuming a percentage...
  7. var10

    Failure Load Calculations

    I guess for Aluminium I can use Proof Stress instead of the Yield stress? Any thoughts?
  8. var10

    Failure Load Calculations

    Hi Everyone, I am trying to validate the design by verifying that the design will withstand the applied load. Just want to know what will be right to use interms of figuring out failure load. Yield stress or tensile stress? The ultimate yield only gives you the Force where it starts to deform...
  9. var10

    Zn Plate coatings and touch ups

    Hi I have a Mild steel plate which on the drawing says the Finish is "Zn Plate & Passivated (Clear)". I noticed a problem with the C/bore holes and therefore I need to make it deeper which will remove the coating. To re-apply the coating can I just get zinc gal bottles? or Zinc brush plating...
  10. var10

    Automation Scope Table

    Thanks asimpson. I had a look in those websites. They are a little big. So I think I am gonna have to make something.
  11. var10

    EMC coatings on plastic

    So we add conductive material to the polymer presently. Its nickel coat - MGI-841-340 G. Just wondering if I can get away from it to something else.
  12. var10

    EMC coatings on plastic

    Anyone with any suggestions on EMC coat that can be used on plastic parts. Each can is $50 and we use 2.5 cans for every unit. The goal is to achieve electrical conduction and shielding inside our molded plastic part. The stuff that we use is very harmful and its expensive. The molded...
  13. var10

    Automation Scope Table

    Hello, I want to make a movement table for a scope. I basically just want two axis movements, one in Z (vertically) and one in Y (Horizontally perpendicular to the user), don't need X movement. Z movement = 80mm so 40mm up & 40mm down. Y Movement = 40mm so 20 left & 20 right. Just wondering...
  14. var10

    Silicon Wafers

    We are trying to calibrate our low light emitting equipment at the moment. We have an inhouse calibrated LMT L1003 to measure and calibrate and it only does till 0.0001 cd/m2. So we just check till this but our equipment can go even finer. Just wondering if silicon wafers can do even finer...
  15. var10

    ABS painting

    Thanks btrueblood - You know how hard it is to implement the changes, going through everyone above me. I had thought about reaming prior and masking but since they reckon its been working this way for years and now all of sudden when we changed the painter there are issues hence only the way it...
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