ISO 2538:1998 pdf download.Geometrical Product Specifications (GPS) - Series of angles and slopes on prisms
1 Scope
This International Standard specifies two series of prism angles from 120° to 0° 30' and a series of prism slopes from 1:10 to 1:500, for general mechanical engineering purposes.
2 Definitions
For the purposes of this International Standard, the fllowing definitions apply.
2.1 prism
part of a piece which is limited by two intersecting planes See figure 1.
NOTE一Both planes are termed "prism planes". When these are intended for fits, they are termed "mating planes for the prism".
2.2 multiple prism
part of a piece which is limited by several pairs of intersecting planes See figure 2.
NOTES
1 A double prism is limited by two pairs of intersecting planes.
2 When the intersection of each pair of planes is a point, the multiple prism is a pyramid (see figure 3).
2.3 dge prism with a small angle
2. slide prism
vee-block
dovetail
typical prism with a large angle
NOTE一These special prisms are used, for example, as a slideway on machine tools (see figures 4 and 5).ISO 2538 pdf download.