GB/T 39981-2021Building construction machinery and equipment - Portable, hand-held, internal combustion engine driven cut-off machines - Safety requirements (English PDF)

1 Scope

This standard specifies the safety requirements and test inspections for the design and manufacture of portable, hand-held, internal combustion engine cutting machines (hereinafter referred to as cutting machines).

This type of cutting machine is scheduled to be used by a single person when cutting building materials (such as asphalt, concrete, stone and metal).

This standard only applies to cutting machines that use consolidated abrasives and/or super-hard abrasives (diamond) rotary cutting wheels, and the cutting wheels have the largest outer diameter.

The diameter is 430mm. The support of the cutting wheel is installed in its center and driven by the main shaft. The top of the cutting wheel rotates away from the operator.

(see picture 1).

This standard covers all major hazards that are meaningful to these machines under intended use or under conditions of misuse that are reasonably foreseeable by the manufacturer.

Risks, dangerous situations or hazardous events (see Appendix A, Table A.1).

This standard specifies methods to eliminate or reduce the dangers that occur during the use of the cutting machine, as well as the safe work provided with the cutting machine

Canonical type of information.

This standard does not involve the specifications of cutting wheels. As examples of cutting wheel specifications, see GB/T 4127.7, GB/T 23537 and

ISO 13942.

This standard does not apply to machines manufactured before its release date.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 3767-2016 Acoustic sound pressure method to determine the sound power level and sound energy level of the noise source. Approximate free field above the reflective surface.

Process method (ISO 3744.2010, IDT)

GB/T 3785.1 Electroacoustic Sound Level Meter Part 1.Specifications (GB/T 3785.1-2010, IEC 61672-1.2002, IDT)

GB/T 4269.5 Operator control symbols and other marks for portable forestry machinery (GB/T 4269.5-2003, ISO 3767-5.

1992, IDT)

GB/T 14574 Labeling and verification of noise emission values of acoustic machinery and equipment (GB/T 14574-2000, eqvISO 4871.

1996)

GB/T 14790.2-2014 Mechanical vibration Measurement and evaluation of human exposure to hand-borne vibration Part 2.Workplace measurement

Practical Guide (ISO 5349-2.2001, IDT)

GB/T 15706-2012 General Principles of Mechanical Safety Design Risk Assessment and Risk Reduction (ISO 12100.2010, IDT)

Test tool for testing the protection of GB/T 16842 enclosure against people and equipment (GB/T 16842-2016, IEC 61032.1997, IDT)

GB/T 17248.2-2018 Acoustic machinery and equipment emit noise above a reflective surface with negligible environmental correction.

Similar to free-field measurement of emission sound pressure levels at working positions and other designated positions (ISO 11201.2010, IDT)

GB/T 20485.1 Vibration and shock sensor calibration method Part 1.Basic concepts (GB/T 20485.1-2008,

ISO 16063-1.1998, IDT)

GB/T 21398-2008 Electromagnetic compatibility test methods and acceptance rules for agricultural and forestry machinery (ISO 14982.1998, IDT)

GB/T 23716 Human body response to vibration measuring instrument (GB/T 23716-2009, ISO 8041.2005, IDT)

GB/T 23821-2009 Safety distance of machinery to prevent the upper and lower limbs from touching the dangerous zone (ISO 13857.2008, IDT)

GB/T 44257.2 | GB/T 44257.1 | GB/T 41495 | GB/T 32543 | GB 48002 | […]