Tolerance (engineering)

Tolerance in engineering is an allowance made for imperfections in a manufactured object. For example, an electrical specification might call for a resistor with a nominal value of 100Ω (ohms), but will also state a tolerance such as "±1%". This means that any resistor with a value in the range 99Ω to 101Ω is acceptable. It would not be reasonable to specify a resistor with a value of exactly 100Ω, because such a resistor cannot be easily made. It is good practice to specify the largest possible tolerance (while maintaining functionality), to make manufacturing easier and to keep costs down.

Related Topics:
Manufactured - Resistor - Ohm

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