BS ISO 6787:2018 pdf download

BS ISO 6787:2018 pdf download.Assembly tools for screws and nuts — Adjustable wrenches
1 Scope
This document specifies the dimensions of adjustable wrenches and the admissible clearance of the adjustable jaw. It also specifies test conditions to test the suitability of tool performance.
NOTE The wrenches covered by this document are the ones identified in ISO 1703:2005 under reference number 1 1 01 04 0.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1711-1, Assembly tools for screws and nuts — Technical specifications — Part 1: Hand-operated wrenches and sockets
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Dimensions
The dimensions are given in Table 1.
Figure 1 shows only an example and should not influence the design of the wrench.
5 Technical specifications
5.1 Clearance of adjustable jaw
The clearance, c, between the adjustable jaw and the fixed jaw shall be measured in accordance with Figure 2 by application of a low force at the jaw.
The clearance shall not exceed the maximum values for the specified sizes given in Table 1, irrespective of which side is to be checked.
The adjustable jaw shall be manufactured to permit free travel throughout the range of opening without binding or wedging.
6 Designation
An adjustable wrench in accordance with this document shall be designated by:
a) “wrench”;
b) a reference to this document, i.e. ISO 6787;
c) the form, i.e. A or B;
d) the angle, α; and
e) the length, l, in millimetres.
EXAMPLE 1 An adjustable wrench of form A with α = 15° and l = 250 mm is designated as follows:Wrench ISO 6787– A 15 × 250
EXAMPLE 2 An adjustable wrench of Form B with α = 22,5° and l = 300 mm is designated as follows: Wrench ISO 6787 – B 22,5 × 300
7 Marking
Adjustable wrenches shall be marked, permanently and legibly, with at least the following:
a) the nominal length, l, in millimetres;
b) the name or trademark of the manufacturer (or the responsible supplier).