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  • Rules For Rounding Decimals | Eng-Tips
    Rounding only to the even number (i e rounding down on the odd numbers) means that half the time you round the 5 up, half the time down, resulting in no bias or at least a more randomized bias
  • Drafting Conventions per ASME Y14. 5m - Three significant digits rule
    In lieu of an agreed-upon standard such as Y14 5M, it should be assumed that you can't round your way out of an out-of-tolerance situation If the upper limit is 200, and your measurement result is 2001, it's out of tolerance unless there is explicit understanding to the contrary
  • GD T Tips - Dimensions and Tolerances - Rounding
    A common question relates to rounding off measurements or numbers when converting between metric and inch dimensions and tolerances This Tip will address measurements
  • Weird ASME rounding rule regarding fractional decimals.
    "When the digit next beyond the last place to be retained is 5, and there are no digits beyond this 5, or only zeros, increase by 1 the digit in the last place retained if it is odd, leave the digit unchanged if it is even
  • Rounding dimensions for part inspection | Eng-Tips
    We can compare any measurement (no matter how precise) to the dimensional limit, without rounding If it's out of tolerance, even by a trillionth of an inch, it's out of tolerance
  • Interesting Discussion - Is rounding acceptable when measuring parts . . .
    When tolerances are classified by the number of decimal places in the specification, it's a matter of convenience, and does not convey permission to to round if the specification has clearly been exceeded
  • Round off rules | Eng-Tips
    Round off rules are covered by an ASME standard when it comes to engineering drawings The dimensions is always rounded to the even number If your CAD system doesn't conform to ASME drafting standards, get a better system "Wildfires are dangerous, hard to control, and economically catastrophic "
  • Tolerance and significant digits | Eng-Tips
    Let's say I have a print with + - 0 003" tolerance on a dimension Typically with 3 significant digits, one would round numbers like 0 0034 down to 0 003 My question is should a + - 0 003" tolerance be interpreted as + - 0 0034" due to significant digit rounding?
  • Tolerances and decimal places | Eng-Tips
    Yes, it should contain the same number of decimal places See para 2 3 2 (d) of ASME Y14 5M-1994
  • Standard Practice for Using Significant Digits in Test Data to . . .
    This practice is intended to assist the various technical committees in the use of uniform methods of indicating the number of digits which are to be considered significant in specification limits, for example, specified maximum values and specified minimum values





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