BS ISO 18388:2016 download free.Technical product documentation ( TPD ) Relief grooves-Types nd an Imensioning.
BS ISO 18388 specifies a series of relleigrooves [or shafts and holes, intended for general use in mechanical engineering.
ft also intends to avoid unnecessary multiplicity of tools by a restricted selection of groove-types and dlmensona1 versions.
NOTE The shape and the dimensions of the rebel grooves type 6 and H correspond with the indexable hard material Insert? scsordlng to ISO 6987.
2 Normative references
The following documents. in whole or In part, are normatively referenced in BS ISO 18388 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 hoes
ISO 128-24. Technical drawings — General pnnciples of presentation — Port 24: Lines on mechanical engineering drawings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply
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 workpleces 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.
S Dimensions of the reHef grooves
5.1 Relief grooves
The dimensional values olthe relief grooves shall be used for holes and shafts, see TabIel.
6 Designation
The desgnauon oIreIIel grooves shall include the following elements:
— the term Reliefgroove
— the number of this International Standard, i.e., ISO I 11388;
— a hyphen;
— designation or the form by the relevant letter;
— the relief grooves size (radius rand depth it separated by x9.
7 Presentation on the drawing
7.1 General
Relief grooves can be shown rn two presentation methods on technical drawings. The first method is to show Lhe relief groove In a conventional representaflon 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 t2822 (see Figures 8 and Figure 9).
7.2 Conventional representation