BS ISO 18388:2016 pdf download

BS ISO 18388:2016 pdf download.Technical product documentation (TPD) — Relief grooves — Types and dimensioning
1 Scope
This International Standard specifies a series of relief grooves for shafts and holes, intended for general use in mechanical engineering.
It also intends to avoid unnecessary multiplicity of tools by a restricted selection of groove-types and dimensional versions.
NOTE The shape and the dimensions of the relief grooves type G and H correspond with the “Indexable hard material inserts” according to ISO 6987.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 128-22, Technical drawings — General principles of presentation — Part 22: Basic conventions and applications for leader lines and reference lines
ISO 128-24, Technical drawings — General principles of presentation — Part 24: Lines on mechanical engineering drawings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 relief groove
clearance groove of specified form and dimensions created by removing material at an inner corner of a rotationally symmetric workpiece and which is necessary for subsequent machining and assembly with mating parts
4 Dimensions
4.1 Relief groove type E
The relief groove type E, see Figure 1, shall be applied to workpieces where the planar surface is not subjected to high fatigue loads and where the cylindrical surface will be subsequently machined if necessary. They are also suitable where mating parts have a relatively large counterbore or will not be in contact with the planar surface.
7 Presentation on the drawing
7.1 General
Relief grooves can be shown in two presentation methods on technical drawings. The first method is to show the relief groove in a conventional representation and show how to present full details (see Figure 6 and Figure 7). The second method is the simplified representation of relief grooves shown in technical drawings. This method shall preferably be drawn by using a continuous wide line, type 01.2 as in ISO 128-24. Designations shall be given in conjunction with a leader line and reference line as in ISO 128-22 (see Figures 8 and Figure 9).
7.2 Conventional representation