In terms of measurement, the difference between the maximum and minimum dimensions of permissible errors is called the "tolerance." The allowable range of errors prescribed by law, such as with industrial standards, can also be referred to as tolerance.
If "60 (+0.045 -0.000)" is written on a drawing, "60" represents the reference dimension, and "+0.045 -0.000" indicates the tolerance of the upper and lower limits. In this case, the upper limit is 60.045 and the lower limit is 60.000.
Definition of TOLERANCE:
The amount of deviation from a given specification that is considered acceptable in the manufacturing of items in order to meet a particular standard of quality.
Accuracy determines how close your measurement is to the actual signal value. Precision is the degree to which your measurements vary from one to the next. Tolerance is the pre-determined, acceptable level of that variation in precision.
“In industrial instrumentation, accuracy is the measurement tolerance of the instrument. It defines the limits of the errors made when the instrument is used in normal operating conditions. Resolution is simply how fine the measuring instrument is set to read out—whether to tenths, hundreds, thousands or whatever.”
An electrical specification might call for a resistor with a nominal value of 100 Ω (ohms), but will also state a tolerance such as "±1%". This means that any resistor with a value in the range 99–101 Ω is acceptable.
Accuracy = closeness of agreement between a measured quantity value and a true quantity value of a measurand. Error or measurement error = measured quantity value minus a reference quantity value. Tolerance =difference between upper and lower tolerance limits.
These are grouped into form tolerance, orientation tolerance, location tolerance, and run-out tolerance, which can be used to indicate all shapes.
TOLERANCE - Usually provide as a percentage of the expected value. It can be plus or minus. Tolerance = (Measured Value - Expected Value)/Expected Value. In the above case the Tolerance is (75.1-75.0) / 75 = 0.13%.
Tolerance can be unilateral or bilateral. A unilateral tolerance varies in only one direction, while a bilateral tolerance varies in both directions from the basic size.
Calibration tolerance is the maximum acceptable deviation between the known standard and the calibrated device. At Metal Cutting, whenever possible the calibration of the devices we use for measuring parts is based on NIST standards.
The principle of tolerance is the judgment that two instances are sufficiently similar that we can treat them as the same for present purposes. "Tolerance - is the essential safeguard, the essential degree of coarseness which makes it possible to work with abstract entities in the real world".
For example, a neighbor who has a temple in their backyard. Tolerance in this situation means accepting that they can do what they want in their backyard so long as it isn't rude or tangibly disruptive. Of course, if people are partying almost every day, you also have the right to complain.
Tolerance is important because it provides a more cohesive, peaceful society. People who are free to express themselves freely and peacefully without fear of persecution are more likely to live happier lives as functional members of society.
willingness to accept behavior and beliefs that are different from your own, even if you disagree with or disapprove of them: religious/racial tolerance. There is zero tolerance of violence at this school – if you're caught fighting, you'll be suspended.
Tolerance Band
For example: A 220 Ω resistor has a silver tolerance band. Tolerance = value of resistor x value of tolerance band = 220 Ω x 10% = 22 Ω 220 Ω stated resistance +/- 22 Ω tolerance means that the resistor could range in actual value from as much as 242 Ω to as little as 198 Ω.
Overview: What is the Percent of Tolerance? Within a batch of identically manufactured parts, a certain percentage will fall within the acceptable tolerance required by the customer. Tolerance represents the span of values between the minimum and maximum allowable range of error within large amounts of items produced.
Physical Tolerance, sometimes called dimensional tolerance, is the most common type.
A tolerance level lies on a continuum from high tolerance to low tolerance, with high tolerance meaning that you tolerate more of the behavior you don't like and low tolerance that you tolerate less of that behavior.
Dimensional Tolerances are an accepted range of values that a shape's specified dimension(s) is allowed to deviate between. These specifications are typically set by either ASTM International or the manufacturer of the material.
Donald Wheeler, defines the precision-to-tolerance ratio as the amount of tolerance that is consumed by adjusting the specification limits to account for measurement error. This approach represents what happens in reality with measurement error's impact on the specifications.
Tolerance/ Margin of Error
Error in measurement may be represented by a tolerance (margin of error). Machines used in manufacturing often set tolerance intervals or ranges in which product measurements will be tolerated or accepted before they are considered flawed. It is one-half of the precision of an instrument.
Error tolerance is the design of things to be resilient to human error. The term is applied to user interfaces that are difficult to get wrong.
Standard tolerances are the most widely used machining tolerances for most fabricated parts today. These tolerances typically fall within the range of ±0.005” and ±0.030”, and machinists usually apply them when customers do not specify tolerance levels.