GB/T 3883.305-2021Safety of motor-operated hand-held, transportable and garden tools - Part 305: Particular requirements for transportable bench grinders (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 of Standardization Documents"

Drafting.

This document is part 305 of GB/T 3883 "Safety of Handheld and Portable Electric Tools and Garden Tools". "Handheld, removable

Movable power tools are currently composed of the following 5 parts in Part 3 of "Safety of Portable Power Tools and Garden Tools".

---GB/T 3883.306-2017 The safety of hand-held and portable electric tools and garden tools-Part 3.Removable liquid

Special requirements for source diamond drills;

---GB/T 3883.311-2019 Hand-held, portable electric tools and garden tools safety part 311.portable type

Special requirements for wood cutting machines;

---GB/T 3883.302-2021 Hand-held, portable electric tools and garden tools safety part 302.portable table

Special requirements for saws;

Special requirements for type grinders;

---GB/T 3883.309-2021 Hand-held, portable electric tools and garden tools safety part 309.portable oblique

Special requirements for cutting saws.

This document replaces GB/T 13960.5-2008 "Safety of portable electric tools Part 2.Special requirements for bench grinders",

Compared with GB/T 13960.5-2008, the main technical changes are.

1) Scope. Added and clarified all kinds of accessories and their parameter requirements for portable bench grinders

chapter);

2) Terms and definitions. modify the definitions of portable bench grinders, tool spindles and workpiece holders, delete other terms and definitions (see section

Chapter 3, Chapter 3 of the.2008 edition);

3) General requirements. Add a description about D (see Chapter 4, Chapter 4 of the.2008 edition);

4) Test general conditions. add the definition of the quality of the portable bench grinder (see Chapter 5, Chapter 5 of the.2008 edition);

5) Marks and instructions. the contents of the original 8.1 were moved to 8.2 and 8.3, and related modifications were made; 8.14.1 was added; the original 8.12.1.101 was moved to

8.14.1.101, and make relevant modifications; increase the relevant requirements of 8.14.2a), 8.14.2b) and 8.14.2c) (see Chapter 8,.2008

Chapter 8 of the Year Edition);

6) Abnormal operation. add the description of the test method of the movable bench grinder driven by the three-phase motor; modify the part 1

Table 4; Delete the original 18.10 (see Chapter 18, Chapter 18 of the.2008 edition);

7) Mechanical hazard. specify the test items corresponding to different accessories; modify the requirements of the shield opening and the eye shield; the original 19.102 is moved to

19.6, and make relevant changes; add 19.7 and 19.8; modify the requirements of the Mars guard plate, workpiece bracket and flange; add

19.105; the original 19.101 was moved to 19.106, and related modifications were made; the imbalance test was added (see Chapter 19, Chapter 19 of the.2008 edition

chapter);

8) Mechanical strength. The original 19.101.1.1 was moved to 20.101, and related modifications were made; the requirements for tool spindles, handling devices and workbenches were added.

Seek (see Chapter 20, Chapter 20 of the.2008 edition);

9) Structure. Add 21.18.2.1 and the requirements for the dust outlet; delete the original 21.18 (see Chapter 21, Chapter 21 of the.2008 edition);

10) Components. 23.3 added (see Chapter 23, Chapter 23 of the.2008 edition);

11) Appendix I (informative). Increase the measurement of noise and vibration.

The translation method used in this document is equivalent to the IEC 62841-3-4.2016 "Electric Motor Driven Handheld and Portable Electric Tools and Garden Machines"

Safety Part 3-4.Special requirements for portable bench grinders".

This document has made the following editorial changes.

---The standard name was revised to "Safety of hand-held, portable electric tools and garden tools, Part 305.portable bench-type grinding wheels

Machine-specific requirements";

---Incorporated the technical errata of IEC 62841-3-4.2016/COR1.2016, and the size of the original drawing 104 "<=85°" was modified to

">=85°"; the amendments of IEC 62841-3-4.2016/AMD1.2019 are included, and the original ISO 603-4

Change the reference to Figure 106, delete the reference standard, add Figure 106, the outer margin position of the terms involved

It is marked with a vertical double line (||).

This document shall be in accordance with GB/T 3883.1-2014 "Safety of Handheld and Portable Electric Tools and Garden Tools Part 1.General Requirements"

Seek to be used together.

The "applicable" part of this document indicates that the corresponding clauses in GB/T 3883.1-2014 apply; the "replacement" part of this document,

The terms in this document shall prevail; the part in this document that states "modification" indicates the relevant provisions of GB/T 3883.1-2014

The content shall be subject to the revised content of this document, and the other content in this clause still applies; the "increase" part of this document indicates that in addition to

In addition to complying with the corresponding provisions of GB/T 3883.1-2014, it should also comply with the additional provisions of this document.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Electric Tool Standardization Technical Committee (SAC/TC68).

Drafting organizations of this document. Shanghai Electric Tool Research Institute (Group) Co., Ltd., Jiangsu Jinding Electric Co., Ltd., Jiangsu Dongcheng Electric Industrial Co., Ltd.

Tools Co., Ltd., Jiangsu SUMEC Hardware Tools Co., Ltd., Baoshide Technology (China) Co., Ltd., Ruiqi Holdings Co., Ltd.

Introduction

In.2014, my country issued the national standard GB/T 3883.1-2014 "Safety of hand-held and portable electric tools and garden tools No. 1

Part. General Requirements, the original GB/T 3883 (part of hand-held power tools), GB/T 13960 (part of portable power tools) and

The common technical requirements of the general safety standards for the three major series of electric tools in GB/T 4706 (only for garden power tools) have been integrated.

There are 3 parts in the special requirements for specific types of small products that are used in conjunction with GB/T 3883.1-2014.

Portable power tools part), part 3 (portable power tools part), and part 4 (garden power tools part), all transform the corresponding country

The specific requirements of the international standard IEC 62841 series.

The main element of the standard name is expanded to "safety of hand-held, portable power tools and garden tools", and the original hand-held power tools are used

Part of the standard number GB/T 3883.The standard sub-part number of each sub-category product consists of three digits, of which the first digit

Indicates the corresponding part, the 2nd and 3rd digits indicate different subcategories.

The new version of the GB/T 3883 series of standards will form a more scientific, complete, universal, and unified series of safety standards for electric tool products

The system makes the implementation of the standard more practical and convenient to use.

At present, the new version of GB/T 3883 series standard "portable electric tools part" has published standards as follows.

---GB/T 3883.302-2021 Hand-held, portable electric tools and garden tools safety part 302.portable table

Special requirements for saws;

Special requirements for type grinders;

---GB/T 3883.306-2017 The safety of hand-held and portable electric tools and garden tools-Part 3.Removable liquid

Special requirements for source diamond drills;

---GB/T 3883.309-2021 Hand-held, portable electric tools and garden tools safety part 309.portable oblique

Special requirements for cutting saws;

---GB/T 3883.311-2019 Hand-held, portable electric tools and garden tools safety part 311.portable type

Special requirements for wood cutting machines.

The following standards will be revised in the future.

---GB/T 13960.3-1996 Special requirements for safe rocker saws for portable power tools;

---GB/T 13960.4-2009 Safety of portable electric tools Part 2.Special requirements for planing and thickness planing;

---GB/T 13960.6-1996 Special requirements for safety band saws for portable power tools;

---GB/T 13960.8-1997 Safety of portable power tools Part 2.Special requirements for diamond saws with water source;

---GB/T 13960.10-2009 Safety of portable electric tools Part 2.Special requirements for single-axis vertical wood milling;

---GB/T 13960.13-2005 The second part of the safety of portable electric tools. the special requirements for the oblique cutting bench combination saw.

Safety of hand-held and portable electric tools and garden tools

Part 305.Special requirements for portable bench grinders

1 Scope

In addition to the following provisions, this chapter of GB/T 3883.1-2014 applies.

increase.

This document applies to portable bench grinders that can install one or two of the following accessories.

---Type 1 grinding wheel with a diameter of no more than 310mm and a thickness of no more than 55mm (see Figure 106);

---Wire brush wheels with a diameter of no more than 310mm and a thickness of no more than 55mm;

---Buffing wheels with a diameter not greater than 310mm;

And the linear speed of any accessory is between 10m/s and 50m/s.

Note. The polishing wheel is also called the grinding wheel.

2 Normative references

This chapter of GB/T 3883.1-2014 is applicable.

3 Terms and definitions

In addition to the following provisions, this chapter of GB/T 3883.1-2014 applies.

3.101

Bench grinder

Grinding, cleaning and polishing of metal or similar materials through one or two rotating attachments fixed on one or two tool spindles

Or a grinding tool, as shown in Figure 101.The workpiece is held by the hand and may be supported by the workpiece carrier.

3.102

Toolspindle

The drive shaft that supports and drives the accessory to rotate on the bench grinder.

3.103

Workrest

A table or device used to support and guide workpiece processing.

4 General requirements

In addition to the following provisions, this chapter of GB/T 3883.1-2014 applies.

4.101 D corresponds to the maximum diameter of the accessories that can be used on each tool spindle. Unless otherwise specified, tools based on the D value

The special requirements of the spindle should match the D value of the relevant spindle.

Unless otherwise specified, in the following parts of this article, when using multiples of D as a requirement or reference for "force", the unit of force is Newton

(N), the unit of D is millimeter (mm).