Hand-held motor-operated electric tools - Safety -- Part 2-20: Particular requirements for band saws

This clause of Part 1 is applicable, except as follows: Addition: This standard applies to band saws.

Handgeführte motorbetriebene Elektrowerkzeuge - Sicherheit -- Teil 2-20: Besondere Anforderungen für Bandsägen

Outils électroportatifs à moteur - Sécurité -- Partie 2-20: Règles particulières pour les scies à ruban

Traite de la sécurité des outils dont la tension assignée n'est pas supérieure à 250 V en courant monophasé alternatif ou courant continu et 440 V en courant alternatif triphasé. Complète ou modifie les articles correspondants de la CEI 60745-1.

Električna ročna orodja - Varnost - 2-20. del: Posebne zahteve za tračne žage (IEC 60745-2-20:2003 + A1:2008, spremenjen)

General Information

Status
Published
Publication Date
18-Nov-2009
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
23-Oct-2009
Due Date
28-Dec-2009
Completion Date
19-Nov-2009

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SLOVENSKI STANDARD
SIST EN 60745-2-20:2009
01-december-2009
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SIST EN 60745-2-20:2004

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Hand-held motor-operated electric tools - Safety -- Part 2-20: Particular requirements for

band saws

Handgeführte motorbetriebene Elektrowerkzeuge - Sicherheit -- Teil 2-20: Besondere

Anforderungen für Bandsägen

Outils électroportatifs à moteur - Sécurité -- Partie 2-20: Règles particulières pour les

scies à ruban
Ta slovenski standard je istoveten z: EN 60745-2-20:2009
ICS:
25.080.60 Strojne žage Sawing machines
25.140.20 (OHNWULþQDRURGMD Electric tools
SIST EN 60745-2-20:2009 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60745-2-20:2009
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SIST EN 60745-2-20:2009
EUROPEAN STANDARD
EN 60745-2-20
NORME EUROPÉENNE
September 2009
EUROPÄISCHE NORM
ICS 25.140.20 Supersedes EN 60745-2-20:2003 + A1:2009 + A11:2007
English version
Hand-held motor-operated electric tools -
Safety -
Part 2-20: Particular requirements for band saws
(IEC 60745-2-20:2003, modified + A1:2008)
Outils électroportatifs à moteur - Handgeführte motorbetriebene
Sécurité - Elektrowerkzeuge -
Partie 2-20: Règles particulières Sicherheit -
pour les scies à ruban Teil 2-20: Besondere Anforderungen
(CEI 60745-2-20:2003, modifiée + für Bandsägen
A1:2008) (IEC 60745-2-20:2003, modifiziert +
A1:2008)

This European Standard was approved by CENELEC on 2009-07-01. CENELEC members are bound to

comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and

notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,

Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60745-2-20:2009 E
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SIST EN 60745-2-20:2009
EN 60745-2-20:2009 - 2 -
Foreword

The text of the International Standard IEC 60745-2-20:2003, prepared by SC 61F (transformed into

IEC TC 116, Safety of hand-held motor-operated electric tools), together with the common modifications

prepared by the Technical Committee CENELEC TC 61F (transformed into TC 116) was submitted to the

formal vote and was approved by CENELEC as EN 60745-2-20 on 2003-09-01.

A draft amendment (prAA) was prepared to align Subclause 6.2 with the new Subclause 6.2 in

EN 60745-1. Moreover, vibration values determined with the new 6.2 are complying with the requirements

of the Physical Agents Directive Vibration 2002/44/EC. The text of the draft was submitted to the Unique

Acceptance Procedure and was approved by CENELEC as amendment A11 to EN 60745-2-20:2003 on

2007-06-01.

The text of document 61F/738/FDIS future amendment 1 to IEC 60745-2-20:2003, was submitted to the

IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60745-2-20:2003

on 2009-04-22.

A further draft amendment (prAB), extending Annex ZZ to include the new MD 2006/42/EC, was

submitted to the formal vote.

The combined texts were approved by CENELEC as a new edition of EN 60745-2-9 on 2009-07-01.

This European Standard supersedes EN 60745-2-9:2003 + A11:2007 + A1:2009.
The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-02-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-05-01
This standard is divided into two parts:

Part 1: General requirements which are common to most hand-held electric motor operated tools (for the

purpose of this standard referred to simply as tools) which could come within the scope of this

standard;

Part 2: Requirements for particular types of tools which either supplement or modify the requirements

given in Part 1 to account for the particular hazards and characteristics of these specific tools.

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and covers essential requirements of

EC Directives 98/37/EC (Machinery Directive), amended by Directive 98/79/EC, and of EC Directive

2006/42/EC. See Annex ZZA and Annex ZZB.

Compliance with the clauses of Part 1 together with this Part 2 provides one means of conforming with

the essential health and safety requirements of the Directive concerned.

Warning: Other requirements and other EC Directives can be applicable to the products falling within

the scope of this standard.

This standard follows the overall requirements of EN ISO 12100-1 and EN ISO 12100-2.

This Part 2-20 is to be used in conjunction with EN 60745-1:2009. When this standard states "addition",

"modification" or "replacement", the relevant text of Part 1 is to be adapted accordingly.

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SIST EN 60745-2-20:2009
- 3 - EN 60745-2-20:2009

Subclauses, tables and figures which are additional to those in Part 1 are numbered starting from 101.

Subclauses, tables and figures which are additional to those in IEC 60745-2-20 are prefixed “Z”.

NOTE In this standard, the following print types are used:
- Requirements: in roman type;
- Test specification: in italic type;
- Notes: in smaller roman type.
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SIST EN 60745-2-20:2009
EN 60745-2-20:2009 - 4 -
Endorsement notice

The text of the International Standard IEC 60745-2-20:2003 + A1:2008 was approved by CENELEC as a

European Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
6 Void
Replace by:
6 Environmental requirements
This clause of Part 1 is applicable except as follows:
6.1.2.4 Modification:
Band saws are suspended. The cutting part of the loop blade shall be horizontal.
6.1.2.5 Modification:
Band saws are tested at no-load.
6.2 Vibration
6.2.4.2 Location of the measurement
Addition:
Figure Z101 shows the positions for band saws.
6.2.6.3 Operating conditions
Modification:

Band saws are tested under load observing the conditions shown in Tables Z101 or Z102. If the band

saw is intended to cut metal, the test requirements of Table Z101 apply. If the band saw is intended to cut

wood, the test requirements of Table Z102 apply.
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SIST EN 60745-2-20:2009
- 5 - EN 60745-2-20:2009
Table Z101 — Operating conditions for band saws intended to cut metal

Orientation Cutting rings in a vertical direction from a tube of mild steel. The tube shall have a

+ 10 mm + 2 mm.
diameter of 40 mm and a wall thickness of 2 mm
The steel tube is clamped in a vice which is rigidly mounted on a workbench. The
tube shall project 100 mm from the vice clamp and shall be readjusted at the
beginning of each series of tests.
Tool bit/ settings New saw band as specified for cutting of mild steel.

Speed setting devices shall be adjusted to the setting specified to cut mild steel.

Feed force The force to be applied to the tool in addition to its weight shall be just as necessary

to ensure stable sawing at a brisk pace. Equal force shall be applied to both
handles, avoiding excessive grip forces. Vibration reducing mechanisms shall not
be overloaded to allow them proper operation.
Test cycle A 10 mm wide ring is cut from the tube.
Measurement starts when the band saw enters the tube and stops when the saw
band leaves the tube.

NOTE In general, stable operation is achieved by a feed force which is not more than 50 N in addition to the weight of the tool.

Table Z102 — Operating conditions for band saws intended to cut wood

Orientation Cutting slices in vertical direction of a horizontal piece of softwood 50 mm x 50 mm

with a minimum length of 200 mm.
The workpiece shall be firmly clamped to a workbench using resilient material,
which shall be mounted so that it does not have any significant resonance in the
frequency range that can influence the test result.
The wood shall project 100 mm from the clamped area and shall be readjusted at
the beginning of each series of tests.
Tool bit/settings New saw band as specified for cutting softwood.

Speed setting devices shall be adjusted to the setting specified to cut softwood.

Feed force Just sufficient to cut at a brisk pace. Equal force shall be applied to both handles,

avoiding excessive grip forces. Vibration reducing mechanisms shall not be
overloaded to allow them proper operation

Test cycle One test cycle is given by cutting off one approximately 10 mm wide slice (set by rip

fence if available) across the wood.
The measurement starts when the saw band enters the wood and finishes when
the saw band leaves the wood.

NOTE In general, stable operation is achieved by a feed force which is not more than 50 N in addition to the weight of the tool.

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SIST EN 60745-2-20:2009
EN 60745-2-20:2009 - 6 -
6.2.7.1 Reported vibration value
Addition:

For band saws intended to cut metal, the result a in accordance with Table Z101 shall be reported:

h,CM
a = mean vibration “cutting metal”.
h,CM

For band saws intended to cut wood, the result a in accordance with Table Z102 shall be reported:

h,CW
a = mean vibration “cutting wood”.
h,CW
For saws intended to cut both metal and wood, both a and a shall be reported.
h,CM h,CW
6.2.7.2 Declaration of the vibration total value
Addition:

The vibration total value of the handle with the highest emission and the uncertainty K shall be declared:

− for band saws intended to cut metal
the value of a , with the work mode description “cutting metal”;
h,CM
− for band saws intended to cut wood
the value of a , with the work mode description “cutting wood”;
h,CW
− for band saws intended to cut metal and wood
the value of a , with the work mode description “cutting metal” and
h,CM
the value of a , with the work mode description “cutting wood”.
h,CW
21 Construction
Add:
21.Z1 Addition:

Band saws are not considered to be tools where a considerable amount of dust is produced.

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SIST EN 60745-2-20:2009
- 7 - EN 60745-2-20:2009
Add the following figure:
Figure Z101 - Positions of transducers for band saws
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SIST EN 60745-2-20:2009
EN 60745-2-20:2009 - 8 -
Add the following annex:
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
Annex ZZA
(informative)
Coverage of Essential Requirements of Directive 98/37/EC

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and within its scope the sta
...

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