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  • BSI
    BS EN ISO 286-2:2010, ISO 286-2:1988 Geometrical product specifications (GPS). ISO code system for tolerances on linear sizes - Tables of standard tolerance classes and limit deviations for holes and shafts
    Edition: 2013
    $526.05
    / user per year

Description of BS EN ISO 286-2:2010 2013

This part of ISO 286 gives values of the limit deviations for commonly used tolerance classes for holes and shafts calculated from the tables given in ISO 286‑1. This part of ISO 286 covers values for the upper limit deviations ES (for holes) and es (for shafts), and the lower limit deviations EI (for holes) and ei (for shafts) (see Figures 1 and 2).

NOTE In the tables of limit deviations, the values of the upper limit deviation ES or es are shown above the values of the lower limit deviation EI or ei except for tolerance classes JS and js which are symmetrical about the zero line.

The ISO system for tolerances on linear size provides a system of tolerances and deviations suitable for features of the following types:

  1. cylinders;

  2. two parallel opposite surfaces.

For simplicity, and also because of the importance of cylindrical workpieces of circular section, only these are referred to explicitly. It should be clearly understood, however, that the tolerances and deviations given in this part of ISO 286 equally apply to workpieces of other than circular sections.

In particular, the term “hole” or “shaft” is used to designate features of the cylinder type (e.g. for the tolerancing of the diameter of a hole or shaft) and, for simplicity, these terms are also used for two parallel opposite surfaces (e.g. for the tolerancing of the thickness of a key or the width of a slot).

For further information on terminology, symbols, the basis of the system, etc., see ISO 286‑1.

Figure 1 Upper and lower limit deviations for holes (internal features)

image

Key

1 K1 to K3, and also K4 to K8, for nominal size ≤ 3 mm
2 K4 to K8, for sizes for which 3 mm < nominal size ≤ 500 mm
3 K9 to K18, and also K4 to K8 for nominal size > 500 mm
4 M1 to M6
5 M9 to M18, and also M7 to M8 for nominal size > 500 mm
6 N1 to N8 and also N9 to N18 for sizes for which 1 mm < nominal size ≤ 3 mm, as well as nominal size > 500 mm
7 N9 to N18 for sizes for which 3 mm < nominal size ≤ 500 mm AC1_end

Figure 2 Upper and lower limit deviations for shafts (external features)

image

Key

1 j5, j6
2 k1 to k3, and also k4 to k7 for nominal size ≤ 3 mm
3 k4 to k7 for sizes where 3 mm < nominal size ≤ 500 mm
4 k8 to k18, and also k4 to k7 for sizes > 500 mm AC1_end


Calculated from the information given in Part 1.

Standard NumberBS EN ISO 286-2:2010, ISO 286-2:1988
TitleGeometrical product specifications (GPS). ISO code system for tolerances on linear sizes - Tables of standard tolerance classes and limit deviations for holes and shafts
StatusDefinitive
Publication Date2013-08-31
ReplacesBS EN 20286-2:1993
Identical National Standard OfEN ISO 286-2:2010/AC:2013, ISO 286-2:2010/Cor 1:2013
CorrectsBS EN ISO 286-2:2010
DescriptorsDimensional tolerances, SI system (metric), Grades (quality), Standard tolerances, Shafts (rotating), Tolerances (measurement), Fits, Holes
ICS17.040.40 Geometrical Product Specification (GPS), 17.040.10 Limits and fits
CommitteeTPR/1
ISBN978 0 580 84036 4
PublisherBSI
Pages62

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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