the meaning of tolerance term

1) size; the design of a given size, known as the basic dimensions. Basic dimensions

2) actual size: Parts by measuring the resulting size after processing, known as the actual size.

3) The limits of size: the actual size to allow the change of threshold values ??is called the limit size. Determine the basic size. The larger of the two extremes referred to as the maximum limit of size Dmax (dmax); smaller one called the limit size Dmin (or dmin).

 size bias; a size reduction of its basic size from the algebra, called the size deviation, referred to as bias.

Actual deviation = the actual size of a size

The maximum limit of size reduction from the algebra of its basic size, called on the bias; minimum limit of size reduction of its basic size from the algebra, called the deviation; on the deviation and lower deviation collectively referred to as the limit deviation. National standards, hole deviation, code-named ES, axis deviation code; hole deviation Code EI axis deviation Code, then:

ES = maximum limit foot of the hole - hole size

axis size cs = axis of maximum limits of size -

EI = minimum limit of size of the hole - hole size

ei = axis of the minimum limit size - Axis Auk this size

The deviation can be positive, negative or zero value.



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