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Recent content by Madhu454

  1. Madhu454

    Maximum Material Modifier for Press fit holes

    Hi All, Need help with choosing the correct material modifier for press fit holes (H7), while using a positional tolerance. Need to position TWO HOLE PATTERN (Diagonally placed on a rectangular plate) with a position tolerance, Dowel pins to be fitted to these holes, these dowel pins(m6) will be...
  2. Madhu454

    Which Screw stud to be used?

    Hi All, I need your help. I have two 3mm steel sheet. I want to connect both of them with the screw stud. Also I don't want the screw surface to protrude over the sheet on both sides. Is there any self tapping screw studs available? if So can anyone help me with the Standard of screws? Is there...
  3. Madhu454

    ASME GDTP Senior Exam

    Hi All, Thanks a lot for the reply:)
  4. Madhu454

    ASME GDTP Senior Exam

    Dear All, I had completed ASME GDTP technologist certification in 2011 on 1994 std. Now I am planning to prepare for ASME GDTP senior level exam. Could any one help me to understand. 1)How Technologist level exam is different compare to senior level exam? 2)Is the questions are more related...
  5. Madhu454

    Mechanisms and Robotics

    Hi All, Could you please suggest any good books on Mechanisms and Robotics to start with. With suitable practical applications Thanks in advance.
  6. Madhu454

    Rework by maintaining associativity : NX

    Hi, Thanks for the reply. One such method I found recently was, I was editing the linked body in the part navigator, by edit with roll back option and then linking to the new body. By doing so I was missing the associativity on some of the section curves which was already made, then the other...
  7. Madhu454

    Rework by maintaining associativity : NX

    Hi All, Could any one of you tell me the best practices that needs to be followed while adjusting the NX models based on the existing files. Most of the times we have to use new part file instead of the existing one, and still maintain the associativity of all the child features. How best this...
  8. Madhu454

    Conversion of Ra to Rz surface roughness

    Hi All, Thanks for the reply. It was helpful.
  9. Madhu454

    Conversion of Ra to Rz surface roughness

    Hi, Is there any thumb rule or acceptable guidelines to convert Ra surface roughness values to Rz surface roughness values?
  10. Madhu454

    Formula : Threaded Holes on both the plates

    Hi, Appendix B of 2009 std explains the formula for Fixed and Floating fasteners. For some reason if I want tapped holes on both the plates. How to calculate the positional tolerance for such cases? Can anyone help please me on this.
  11. Madhu454

    Contoured Datum : Fig 4-29 of 2009 Std

    Thank you John-Paul
  12. Madhu454

    Contoured Datum : Fig 4-29 of 2009 Std

    Hi, I am referring to figure 4-29 of ASME Y14.5-2009 standard. Could anyone help me to understand the concept clearly. 1) The datum feature "B" is a semicircular surface (feature). Since there is no opposed surface to this, it is not a feature of size, But in fig (b) Datum B is identified with...
  13. Madhu454

    Min Wall Thickness - GD&T v/s Note

    Hi, In continuation to the above discussion, now I got some more doubts. 1) Is adding the LMB for datum feature A, change the Min wall thickness? 2) Does it also means, when datum feature A produced at LMC, it should have perfect form?
  14. Madhu454

    Min Wall Thickness - GD&T v/s Note

    HI pmarc, Thanks for the explanation. It is clear now, :)
  15. Madhu454

    Min Wall Thickness - GD&T v/s Note

    Hi pmarc, Thanks for the reply. I was calculating the minimum thickness as below. The boundary for inner dia = 16.5 + 0.1 + 0.2 (pos tol) = 16.8 The boundary for outer dia = 20.3 (lmc) Minimum wall thickness = (20.3 _ 16.8 )/2 = 1.75 But, you have mentioned that the min wall thickness is 1.65mm...
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