Foreword
This document is drafted in accordance with GB/T 1.1-2020 Guidelines for Standardization, Part 1: Structure and Drafting Rules of Standardization Documents.
This document replaces GB/T 4440-2008 Monkey Spanners. Compared with GB/T 4440-2008, except for structural adjustment and editorial changes, the main technical changes are as follows:
——Added terms and definitions (see Chapter 3);
——Added product classification (see 4.2);
——The requirements for materials have been changed (see 5.1, 4.1 of Version 2008)
——Added 750 mm.9o0 mm products and related dimensions (see 5.2)
——Torque requirements have been changed (see 5.4, 4.3 of 2008 version);
——Surface quality requirements have been changed (see 5.7.4, 4.6.4 of 2008 version)
——The test method of materials is added (see 6.1);
——Changed the torque test method (see 6.4, 5.3 of 2008 version);
——Change the test method of small shoulder off seam (see 6.5.2, 3.4.2 of 2008 version);
——The test method for thickness of electrodeposited coating in surface treatment has been changed (see 5.5.1 of Version 6, 6, 608)
——The inspection rules have been changed (see Chapter 7, Chapter 6 of Version 2008).
ISO 6787:2018 Screw and Nut Assembly Tools Monkey Spanners is adopted for modification of this document.
Compared with ISO 67872018, this document has many structural adjustments. See Appendix A for the comparison list of structure number changes between the two documents.
This document and ISO 6787; Compared with 2018, there are many technical differences, which are marked with a vertical single line (|) in the blank space of the outer margin of the clauses involved. See Appendix B for a list of these technical differences and their causes.
The following editorial changes have been made to this document:;
——Change the document name to Monkey Wrench;
——References were deleted.
Please note that some of the contents of this document may involve patents. The issuing agency of this document does not assume the responsibility of identifying the patent. This document is proposed by China Light Industry Federation.
This document is under the jurisdiction of National Technical Committee for Standardization of Hardware Products (SAC/TC 174).
The previous versions of this document and its substitutes are as follows:
——It was first published in 1998 as the first revision of GB/T44,401,998-2008
——This is the second revision.
1 Scope
This document specifies the product classification, marking, requirements, test methods, inspection rules and marks, packaging, transportation and storage of monkey wrench. This document is applicable to adjustable wrenches for tightening bolts and nuts or other fasteners.
2 Normative References
The contents in the following documents, through normative references, constitute indispensable provisions of this document. Where, for dated references, only the version corresponding to that date applies to this document; For undated references, the latest version (including all amendments) is applicable to this document.
GB/T 230.1 Metallic Materials Rockwell Hardness Test Part 1: Test Method (GB/T 230.1-2018, ISO 6508-1:2016, MOD)
GB/T 699 High Quality Carbon Structural Steel
GB/T 2828.1 Sampling Procedures for Inspection by Attributes Part 1: Sampling Plan for Lot by Lot Inspection Indexed by Acceptance Quality Limit (AQL) (GB/T 2828.1-2012, ISO 2859-1:1999, IDT)
GB/T4955 Metallic Coatings - Coating Thickness Measurement, Anodic Dissolution Coulometry (GB/T 4955-2005, ISO 2177:2003, 1DT)
GB/T5305 Packaging, Marking, Transportation and Storage of Hand Tools
GB/T 6060.2 Surface Roughness Comparison Specimens, Grinding, Turning, Boring, Milling, Inserting and Planing Machined Surfaces (GB/T 6060.2-2006, ISO 2632-1:1985, MOD)
GB/T 6462 Metallic and Oxide Coatings, Thickness Measurement Microscopic Method (GB/T 6462-2005,1SO 1463:2003, IDT)
3 Terms and definitions
three point one
Opening dimension
The dimension between the two vertical opening surfaces when the movable opening is moved to the maximum distance from the vertical opening surface of the wrench body by adjusting the worm.
Note: Unit: mm
three point two
Small shoulder off seam clearance
The clearance between the small shoulder plane of the movable wrench mouth and the guide rail surface of the wrench body.
Note: Unit: mm
4 Product classification and marking
4.1 Product type
The type of monkey wrench is shown in Figure 1, and the small shoulder gap is shown in Figure 2. Note: The illustration is only an example and does not affect the design and manufacture of the product.
5 Requirements
5.1 Materials
Monkey wrenches shall be made of 45 steel conforming to GB/T 699 or other materials that have been proved to be equally applicable.
6 Test method
6.1 Materials
The supplier shall provide relevant quality assurance certificate to verify the materials. In case of dispute, the inspection shall be carried out according to the standards of corresponding materials.
7 Inspection Rules
7.1 Inspection classification
The inspection type is factory inspection.
8 Marking, Packaging, Transportation and Storage
Appendix A (informative) Changes in the structure number of this document and ISO 6787:2018
Appendix B (informative) Technical differences between this document and ISO 6787:2018 and their causes
