What is Tolerance: Definition and 58 Discussions

Engineering tolerance is the permissible limit or limits of variation in:

a physical dimension;
a measured value or physical property of a material, manufactured object, system, or service;
other measured values (such as temperature, humidity, etc.);
in engineering and safety, a physical distance or space (tolerance), as in a truck (lorry), train or boat under a bridge as well as a train in a tunnel (see structure gauge and loading gauge);
in mechanical engineering the space between a bolt and a nut or a hole, etc.Dimensions, properties, or conditions may have some variation without significantly affecting functioning of systems, machines, structures, etc. A variation beyond the tolerance (for example, a temperature that is too hot or too cold) is said to be noncompliant, rejected, or exceeding the tolerance.

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  1. T

    What are the deviations for 145H8/d9 based on tolerance tables?

    Determine, by using the attached tolerance tables,the deviations for 145H8/d9 . for only 145H8 ,i know what i mean but 145H8/d9 what does it mean?? pls help thanx
  2. H

    How Do You Determine Gear Tolerance and Surface Roughness?

    Hi all. How do one design the gear tolerance and the surface roughness of a gear? I know there are some quality numbers in AGMA, but is quotaing the number is enough for specifying the tolerances of a gear? about the surface roughnessm i saw many things like remove mostly 3.2mm etc...How...
  3. ShawnD

    Can drug tolerance reverse with abstinence?

    People who consume a lot of drugs, like caffeine or cocaine, eventually build up a kind of tolerance, and they need more and more to get the same effect. This is why many drugs get out of hand, and you suddenly find yourself buying those really big starbucks coffees loaded with enough caffeine...
  4. B

    Anyone else with no tolerance for racism?

    Grab your pitchforks. http://www.resistance.com/forum/index.php? >_< I just want to... throw random unintelligible insults at them. :devil:
  5. C

    How do drug users gain tolerance for a drug?

    We're studying cell signaling and signal transduction in my biology class, and we discussed this briefly in class but I don't really understand it. Why does the affect of a drug decrease the more a person uses it? I don't understand. If someone takes a drug more, wouldn't there be more of the...
  6. M

    Can hormones affect memory and tolerance to alcohol?

    I have noticed that on days 28-4 my memory is awful. I have also noticed that during this period if I consume alcohol, I seem become intoxicated rapidly, and forget things much more than I normally would drinking the same amount. I tried to look at charts, but could not really work out a reason...
  7. U

    Calculating Total Resistance & Tolerance of 2 Wires

    If there were 2 wires, and one of the wire has a resistance of 50 Ohms with a tolerance of 5%, while the second wire has a resistance of 60 Ohms with a tolerance of 3%. The total resistance would be 110 Ohms but what about the total tolerance? Would it be 8%?
  8. U

    Resistance & Tolerance: Calculating Total Values

    If there were 2 wires, and one of the wire has a resistance of 50 Ohms with a tolerance of 5%, while the second wire has a resistance of 60 Ohms with a tolerance of 3%. The total resistance would be 110 Ohms but what about the total tolerance? Would it be 8%?
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