GB/T 26548.5-2025Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 5: Drills and impact drills (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is Part 5 of GB/T 26548 "Hand-held portable power tools vibration test method". GB/T 26548 has been published.

The following parts are published.

--- Part 1: Angle and face grinding machines;

--- Part 2: Air triggers, nutrunners and screwdrivers;

--- Part 3: Polishing machines, rotary, sliding and compound grinders;

--- Part 4: Straight shank grinding machines;

--- Part 5: Drills and impact drills;

--- Part 6: Compactors;

--- Part 7: Punching machines and shears;

--- Part 8: Reciprocating saws, polishers and files and pendulum or rotary saws;

--- Part 9: Descaling hammers and needle descaling devices;

--- Part 10: Percussive rock drills, hammers and breakers;

--- Part 11: Stone hammer;

--- Part 12: Mould grinding machines;

--- Part 13: Fastener driving tools.

This document replaces GB/T 26548.5-2017 "Hand-held portable power tools - Vibration test methods - Part 5: Drilling and impact test methods" Compared with GB/T 26548.5-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The test parameters for straight shank drills have been changed (see Table 1, Table 1 of the 2017 edition);

b) The thrust parameters for angle drills have been changed (see Table 1, Table 1 of the 2017 edition).

This document is equivalent to ISO 28927-5:2009 "Hand-held portable power tools — Vibration test methods — Part 5: Drills and impact drills".

The following minimal editorial changes have been made to this document.

--- Incorporated the amendments to ISO 28927-5:2009/Amd.1.2015.The outer margins of the clauses involved are marked with vertical Straight double lines (||) are used to mark the area.

Introduction

To standardize the vibration measurement method for handheld portable power tools, the International Organization for Standardization has published ISO 28927, a document with 13 parts.

my country intends to adopt the 13 parts of ISO 28927 as equivalents and formulate the corresponding parts of GB/T 26548.

GB/T 26548 is proposed to be structured as follows.

--- Part 1: Angle and face grinders. Covers angle electric grinders, angle pneumatic grinders, and face pneumatic grinders.

--- Part 2: Air triggers, nut runners and screwdrivers. Covers pistol-grip impact air triggers, ring-grip impact air triggers, ratchet air wrenches screwdrivers, angle nut drivers, straight screwdrivers, and pistol-grip screwdrivers.

--- Part 3: Polishing machines, rotary, sliding and compound grinders. Covering angle grinders/polisher, end grinders/polisher Polishing machine, compound grinder, slide plate grinder.

--- Part 4: Straight shank grinding machines. Covers straight shank grinding machines using flat grinding wheels, straight shank grinding wheels using cored grinding heads Machine, use an extended straight shank grinding wheel machine with a core grinding head.

--- Part 5: Drills and impact drills. Covers pistol-grip drills, angle drills and impact drills.

--- Part 6: Compactors. Covers compactors for ground compaction and compactors for workbenches.

--- Part 7: Punching shears and scissors. Covers punching shears, pistol-grip scissors, circular cutting scissors, and straight-handled scissors.

--- Part 8: Reciprocating saws, polishers and files and pendulum or rotary saws. Covers straight handle pendulum saws, small circular saws, circular saws Handle reciprocating saw, gun handle reciprocating saw, straight handle reciprocating saw, fine saw, straight handle reciprocating polishing/filing machine, straight handle horizontal polishing machine Polishing/filing machines, angular reciprocating polishing/filing machines, pendulum knives.

--- Part 9: Descaling hammers and needle descaling devices. Covers engraving pens, needle descaling devices and descaling hammers.

--- Part 10: Percussive rock drills, hammers and breakers. Covers rock breakers/rock drills, rotary hammers, air shovels, small blasthole drills, picks, chisels Hammer, riveter.

--- Part 11: Stone hammers. Covering straight-handled hammers, ring-handled hammers, spear-handled hammers, and chisels with sleeves.

--- Part 12: Mould grinding machines. Covers straight shank grinding machine, angle grinding machine and pencil-shaped grinding machine.

--- Part 13: Fastener driving tools. Covers pneumatic fastener driving tools, battery-powered fastener driving tools, electric fasteners Fastener driving tools, gunpowder powered (nail bullet) fastener driving tools, gas powered fastener driving tools.

This document is a Type C standard as defined in ISO 12100.

For machines designed and manufactured in accordance with the requirements of Class C standards, when the requirements of Class C standards differ from those in Class A or Class B standards, when the requirements of type C standards are met, they shall prevail over those of other types of standards.

GB/T 25631 provides the general technical conditions for the measurement of vibration radiation of handheld and hand-guided machinery. GB/T 26548 (all parts) Based on this standard, the vibration test method for handheld portable machines is given, and the operation of the machine under type inspection conditions and the vibration test of the type are specified.

The standard structure and chapter numbering are consistent with GB/T 25631 for other requirements for performance testing.

This document uses the basic positioning method of sensors first adopted in the European series of standards EN60745 (all parts).

The sensor is preferably placed in the area between the thumb and index finger of the hand because this position interferes least with the operator's grip on the machine.

The vibration generated by the drill during use usually varies greatly. For impact drills, the impact is the main source of vibration.

The change of measurement results is also affected by the quality of the drill bit, the workpiece and the operator's skills.

Unbalance of the drill bit and the insert tool, as well as the non-centering of the drill holder, can cause the measurement results to change. In some drilling operations, the distance between the drill bit and the workpiece is too small.

The interaction can also cause vibrations.

This document uses a real working process for testing. In order to provide a test method that can give better reproducibility of measurement results, the vibration value generated by the test procedure should be as close as possible to the requirements of GB/T 25631 and should be strictly followed.

Requirements for test details. The assessment of vibration exposure in the workplace adopts the method of ISO 5349.

The values obtained are type test values and are intended to represent the average of the upper quartile of typical vibration levels experienced by the machine in actual use.

However, actual values can vary widely depending on many factors, including the operator, the work task, and the tools or consumables inserted.

The maintenance status of the machine itself may also be important. The influence of the operator and operating procedures on low-amplitude vibration is particularly important under real working conditions.

In this case, it is not recommended to use a radiation value lower than 2.5m/s2 to evaluate the vibration level under actual working conditions.

The vibration magnitude is used to evaluate mechanical vibration.

If precise values are required for a particular workplace, it is necessary to carry out measurements at that workplace in accordance with ISO 5349.

Vibration values measured under operating conditions may be higher or lower than those obtained using this document.

In actual working conditions, the use of worn or bent drill bits, worn or unbalanced drill clamps, or the use of drilling power, drill bit size and thrust Reasons such as force mismatch are likely to cause higher vibration values.

Vibration test method for hand-held portable power tools Part 5: Drills and impact drills

1 Scope

This document describes the test method for measuring hand-transmitted vibration radiation from the handle of hand-held power-driven drills and impact drills.

The type test procedure for the vibration of the handle grip of a drill with a drill bit. The measured results are used to compare the vibration of different models of the same type.

machine.

This document applies to straight shank drills and gun handles driven by pneumatic or other power to drill holes in various materials through rotation and impact.

Type drills and angle drills (see Chapter 5).

This document does not apply to heavy-duty drills propelled by screws or drills driven by internal combustion engines.

NOTE. To avoid confusion between "power tools" and "insertion tools", this document uses "machine" instead of "power tools" throughout.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 25631-2010 Mechanical vibration - Rules for the evaluation of vibration of hand-held and hand-guided machines (ISO 20643:2005, IDT) ISO 185 Grey cast irons - Classification Note. GB/T 9439-2023 Grey iron castings (ISO 185:2020, NEQ) ISO 630 (all parts) Structural steels Note. GB/T 34560 (all parts) Structural steel [ISO 630 (all parts)] Note. GB/T 17671-2021 Test method for strength of cement mortar (ISO method) (ISO 679:2009, MOD) ancetests) Note. GB/T 5621-2008 Rock drilling machinery and pneumatic tools - Performance test methods (ISO 2787:1984, MOD) ISO 5349-1 Mechanical vibration - Measurement and evaluation of human exposure to hand-transmitted vibration - Part 1: General requirements General requirements) Note. GB/T 14790.1-2009 Mechanical vibration Measurement and evaluation of human exposure to hand-transmitted vibration Part 1: General requirements (ISO 5349-1.

2001, IDT)

Note. GB/T 6247.1-2013 Rock drilling machinery and portable power tools Terminology Part 1: Rock drilling machinery, pneumatic tools and pneumatic machinery (ISO 5391:2003,MOD) ISO 17066 Hydraulic tools - Vocabulary Note. GB/T 6247.2-2013 Rock drilling machinery and portable power tools - Terminology - Part 2: Hydraulic tools (ISO 17066:2007, IDT) Note. GB/T 25631-2010 Mechanical vibration - Rules for the evaluation of vibration of hand-held and hand-guided machines (ISO 20643:2005, IDT)