SIST EN ISO 11148-12:2013

SLOVENSKI STANDARD
01-maj-2013
1DGRPHãþD
SIST EN 792-12:2000+A1:2008
1HHOHNWULþQDURþQDRURGMD9DUQRVWQH]DKWHYHGHO0DMKQHNURåQHLQQLKDMQH
åDJHWHUSRYUDWQHåDJH,62
Hand-held non-electric power tools - Safety requirements - Part 12: Circular, oscillating
and reciprocating saws (ISO 11148-12:2012)
Handgehaltene nichtelektrisch betriebene Maschinen - Sicherheitsanforderungen - Teil
12: Kleine Kreis, oszillierende und Stichsägemaschinen (ISO 11148-12:2012)
Machines portatives à moteur non électrique - Exigences de sécurité - Partie 12: Scies
circulaires et scies oscillantes et alternatives (ISO 11148-12:2012)
Ta slovenski standard je istoveten z: EN ISO 11148-12:2012
ICS:
25.140.10 3QHYPDWLþQDRURGMD Pneumatic tools
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11148-12
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2012
ICS 25.140.10 Supersedes EN 792-12:2000+A1:2008
English Version
Hand-held non-electric power tools - Safety requirements - Part
12: Circular, oscillating and reciprocating saws (ISO 11148-
12:2012)
Machines portatives à moteur non électrique - Exigences Handgehaltene nicht elektrisch betriebene Maschinen -
de sécurité - Partie 12: Scies circulaires, scies oscillantes Sicherheitsanforderungen - Teil 12: Kleine Kreis-,
et scies alternatives (ISO 11148-12:2012) oszillierende und Stichsägen (ISO 11148-12:2012)
This European Standard was approved by CEN on 30 November 2012.

CEN 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 CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11148-12:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex Z A (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4

Foreword
This document (EN ISO 11148-12:2012) has been prepared by Technical Committee ISO/TC 118
"Compressors and pneumatic tools, machines and equipment" in collaboration with Technical Committee
CEN/TC 255 “Hand-held, non-electric power tools - Safety” the secretariat of which is held by SIS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2013, and conflicting national standards shall be withdrawn at
the latest by June 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 792-12:2000+A1:2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11148-12:2012 has been approved by CEN as a EN ISO 11148-12:2012 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the clauses of this
standard confers, within the limits of the scope of this standard, a presumption of conformity with the
corresponding Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

INTERNATIONAL ISO
STANDARD 11148-12
First edition
2012-12-01
Hand-held non-electric power tools —
Safety requirements —
Part 12:
Circular, oscillating and reciprocating saws
Machines portatives à moteur non électrique — Exigences de sécurité —
Partie 12: Scies circulaires, scies oscillantes et scies alternatives
Reference number
ISO 11148-12:2012(E)
©
ISO 2012
ISO 11148-12:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 General terms and definitions . 2
3.2 Definitions related to circular, oscillating and reciprocating saws . 4
4 Safety requirements and/or protective measures . 5
4.1 General . 5
4.2 Mechanical safety . 5
4.3 Thermal safety .10
4.4 Noise reduction .10
4.5 Vibration . 11
4.6 Materials and substances processed, used or exhausted .12
4.7 Ergonomics .12
4.8 Controls .12
5 Verification .13
5.1 General conditions for tests .13
5.2 Noise .13
5.3 Vibration .13
5.4 Circular saw retractable lower guard .14
5.5 Unintentional start .14
5.6 Power tool construction .14
5.7 Structure of verification of safety requirements .15
6 Information for use .15
6.1 Marking, signs and written warnings .15
6.2 Instruction handbook .16
6.3 Operating instructions .21
6.4 Data .22
6.5 Maintenance instructions .22
Annex A (informative) List of significant hazards .24
Annex B (informative) Examples of power tools covered by this part of ISO 11148 .26
Annex C (normative) Symbols for labels and signs.28
Bibliography .29
ISO 11148-12:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11148-12 was prepared by Technical Committee ISO/TC 118, Compressors and pneumatic tools, machines
and equipment, Subcommittee SC 3, Pneumatic tools and machines.
ISO 11148 consists of the following parts, under the general title Hand-held non-electric power tools — Safety
requirements:
— Part 1: Assembly power tools for non-threaded mechanical fasteners
— Part 2: Cutting-off and crimping power tools
— Part 3: Drills and tappers
— Part 4: Non-rotary percussive power tools
— Part 5: Rotary percussive drills
— Part 6: Assembly power tools for threaded fasteners
— Part 7: Grinders
— Part 8: Sanders and polishers
— Part 9: Die grinders
— Part 10: Compression power tools
— Part 11: Nibblers and shears
— Part 12: Circular, oscillating and reciprocating saws
A part 13, dealing with fastener driving tools, is under preparation.
iv © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
Introduction
This International Standard is a type-C standard as stated in ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
defined in the Scope of this part of ISO 11148.
When requirements of this type-C standard are different from those which are stated in type-A or -B standards,
the requirements of this type-C standard take precedence over the requirements of other standards for
machines that have been designed and built according to the requirements of this type-C standard.
ISO 11148 consists of a number of independent parts for individual types of hand-held non-electric power tools.
Certain parts of ISO 11148 cover hand-held non-electric power tools driven by internal combustion engines
powered by gaseous or liquid fuel. In these parts, the safety aspects relating to internal combustion engines
are found in a normative annex.
The parts are type-C standards and refer to pertinent standards of type A and B where such standards are applicable.
INTERNATIONAL STANDARD ISO 11148-12:2012(E)
Hand-held non-electric power tools — Safety requirements —
Part 12:
Circular, oscillating and reciprocating saws
IMPORTANT — The colours represented in the electronic file of this document can be neither viewed
on screen nor printed as true representations. For the purposes of colour matching, see ISO 3864-4,
which provides colorimetric and photometric properties together with, as a guideline, references from
colour order systems.
1 Scope
This part of ISO 11148 specifies safety requirements for hand-held non-electric power tools (hereinafter “circular,
oscillating and reciprocating saws”) intended for sawing. The circular, oscillating and reciprocating saws can be
powered by compressed air, hydraulic fluid or internal combustion engines and are intended to be used by one
operator and supported by the operator’s hand or hands, with or without a suspension, e.g. a balancer.
NOTE 1 At the time of publication, no circular, oscillating or reciprocating saws driven by internal combustion engines
are known [other than circular saws with bonded abrasives and/or super abrasives (diamond) cut-off wheels]. Once these
are identified, it is intended to amend this part of ISO 11148 to include such power tools.
This part of ISO 11148 is applicable to
— circular saws;
— circular knives;
— oscillating saws having a saw blade with a radius of 50 mm or less or a diamond cutting-off blade with a
radius of 100 mm or less;
— oscillating knives (including windshield knives);
— reciprocating saws, including jig saws and power hack saws.
NOTE 2 For examples of circular, oscillating and reciprocating saws, see Annex B.
NOTE 3 For circular saws with bonded-abrasive and/or super-abrasive (diamond) cut-off wheels, see ISO 11148-7
and ISO 19432.
This part of ISO 11148 is not applicable to special requirements and modifications of circular, oscillating and
reciprocating saws for the purpose of mounting them in fixtures.
This part of ISO 11148 deals with all significant hazards, hazardous situations or hazardous events relevant
to circular, oscillating and reciprocating saws when they are used as intended and under conditions of misuse
which are reasonably foreseeable by the manufacturer, with the exception of the use of circular, oscillating and
reciprocating saws in potentially explosive atmospheres.
NOTE 4 EN 13463-1 gives requirements for non-electrical equipment for potentially explosive atmospheres.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 3857-3, Compressors, pneumatic tools and machines — Vocabulary — Part 3: Pneumatic tools and machines
ISO 11148-12:2012(E)
ISO 5391, Pneumatic tools and machines — Vocabulary
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to
contact with surfaces —Part 1: Hot surfaces
ISO 13732-3, Ergonomics of the thermal environment — Methods for the assessment of human responses to
contact with surfaces — Part 3: Cold surfaces
ISO 15744, Hand-held non-electric power tools — Noise measurement code — Engineering method (grade 2)
ISO 17066, Hydraulic tools — Vocabulary
ISO 20643, Mechanical vibration — Hand-held and hand-guided machinery — Principles for evaluation of
vibration emission
ISO 28927-8, Hand-held portable power tools — Test method for evaluation of vibration emission — Part 8:
Saws, polishing and filing machines with reciprocating action and small oscillating or rotating action
EN 12096, Mechanical vibration — Declaration and verification of vibration emission values
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3857-3, ISO 5391, ISO 12100 and
ISO 17066 (for hydraulic tools) and the following apply.
3.1 General terms and definitions
3.1.1
hand-held power tool
machine operated by one or two hands and driven by rotary or linear motors powered by compressed air,
hydraulic fluid, gaseous or liquid fuel, electricity or stored energy (e.g. by a spring) to do mechanical work and so
designed that the motor and the mechanism form an assembly that can easily be brought to its place of operation
NOTE Hand-held power tools driven by compressed air or gas are called pneumatic tools (or air tools). Hand-held
power tools driven by hydraulic liquid are called hydraulic tools.
3.1.2
inserted tool
tool inserted in the circular, oscillating or reciprocating saw to perform the intended work
3.1.3
service tool
tool for performing maintenance or service on the circular, oscillating or reciprocating saw
3.1.4
control device
device to start and stop the circular, oscillating or reciprocating saw or to change the direction of the rotation or
to control the functional characteristics, such as speed and power
3.1.5
start-and-stop device
throttle
manually operated control on the circular, oscillating or reciprocating saw by which the energy supply to the
motor can be turned on and off
2 © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
3.1.6
hold-to-run start-and-stop device
constant pressure throttle
start-and-stop device that automatically returns to the OFF position when force on the start-and-stop device
actuator is released
3.1.7
lock-on start-and-stop device
constant pressure throttle with instant release lock
hold-to-run start-and-stop device that can be locked in the ON position and whic is designed so that it permits
the circular, oscillating or reciprocating saw to be turned off by a single motion of the same finger or fingers
used to turn it on
3.1.8
lock-off start-and-stop device
lock-off throttle
start-and-stop device that automatically latches in the OFF position when the actuator is released and where
two motions are required to energize the circular, oscillating or reciprocating saw
3.1.9
positive on-off start-and-stop device
positive on-off throttle
start and stop device that remains in an ON position until it is manually changed
3.1.10
maximum operating pressure
maximum pressure at which a circular, oscillating or reciprocating saw may be operated
3.1.11
whip hose
air hose connecting the main air hose and an air tool for the purpose of providing more flexibility
3.1.12
rated air pressure
air pressure, required at an air tool inlet port to assure rated performance of the tool, also considered the
maximum pressure at which the tool may be operated
3.1.13 Rated speed
3.1.13.1
rated speed
〈pneumatic tool〉 speed of an air tool at no load and rated air pressure at the tool inlet port
NOTE The rated speed is expressed in revolutions per minute.
3.1.13.2
rated speed
〈hydraulic tool〉 nominal speed of a hydraulic tool at no load and rated flow at the tool inlet port
NOTE The rated speed is expressed in revolutions per minute.
3.1.14
maximum attainable speed
maximum speed which the tool can achieve under the most adverse condition of possible maladjustment or
malfunction of its speed control devices, when supplied with compressed air at the pressure marked on the
circular, oscillating or reciprocating saw
3.1.15
suspension device
device attached to the tool, whose primary purpose is to reduce the strain on the operator caused by the
weight of the tool
NOTE The device can also have a secondary purpose of transmitting a reaction torque.
ISO 11148-12:2012(E)
3.2 Definitions related to circular, oscillating and reciprocating saws
3.2.1
circular saw
rotary power tool equipped with a circular saw blade
3.2.2
panel saw
air tool for cutting ferrous or non-ferrous panelling, usually having an angle drive and blade speeds of 9,1 m/s
(1 800 sfpm) or less
3.2.3
trim saw
air tool for cutting trim, composition board, plywood, plastic and thin non-ferrous materials usually at speeds
of over 20,3 m/s (4 000 sfpm)
3.2.4
oscillating saw
power tool equipped with a circular or segment saw blade, which moves with an angular oscillating movement
3.2.5
reciprocating saw
power tool equipped with a straight saw blade, which moves with a reciprocating movement
EXAMPLE Jig saw or power hack saw.
3.2.6
knife
edge tool used as a cutting instrument, which has a pointed blade, a sharp edge and a handle
3.2.7
riving knife
metal part placed in the plane of the saw blade, which prevents the wood from tightening on to the rear part of
the saw blade, thus preventing the backward movement of the tool or the jamming of the saw blade
3.2.8
circular knife
rotary power tool equipped with a circular knife
3.2.9
oscillating knife
power tool equipped with a knife, which moves with an angular oscillating movement
3.2.10
saw blade
blade of circular, segment or straight shape intended for cutting or cutting-off operations by chip removal by
means of teeth with cutting edges
3.2.11
guide plate
part supporting the saw on the material being cut
See Figure 2.
3.2.12
shoe or backing plate
support for the reciprocating saw against the work while a cut is being made
4 © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
4 Safety requirements and/or protective measures
4.1 General
The machine shall comply with the safety requirements and/or protective measures and be verified in accordance
with Clause 5. In addition, the machine shall be designed in accordance with the principles of ISO 12100 for
relevant, but not necessarily significant, hazards, which are not dealt with by this part of ISO 11148.
The measures adopted to comply with the requirements of this clause shall take account of the state-of-the-art.
It is recognized that optimizing the design with respect to some safety measures can result in a degradation of
performance against other safety requirements. In such cases, it is required to strike a balance between the
various requirements in order to achieve a circular, oscillating or reciprocating saw design that satisfies each
requirement, so far as is reasonably practicable, and remains fit for purpose.
4.2 Mechanical safety
4.2.1 Surfaces, edges and corners
Accessible parts of circular, oscillating and reciprocating saws, except the inserted tool, shall not have sharp
edges or angles or rough or abrasive surfaces; see ISO 12100:2010, 6.2.2.1.
4.2.2 Supporting surface and stability
Circular, oscillating and reciprocating saws shall be so designed that they can be laid aside and remain in a
stable position on a plane surface.
4.2.3 Flanges
Flanges for circular saws, for clamping the saw blade to the working spindle shall be of equal size, and of a size
not less than 0,3 times the rated diameter of the blade.
4.2.4 Hydraulic fluid ejection
Hydraulic systems of the circular, oscillating and reciprocating saws shall be enclosed so as to give protection
against high-pressure fluid ejection.
4.2.5 Guide plate
Circular saws shall have a guide plate of a size and shape to support the saw against the material being cut.
The guide plate shall be securely fastened to the saw housing. If the blade exposure angle, α ,below the guide
plate (see Figure 1) exceeds 10°, the guide plate shall have an outboard section (see Figure 2). The outboard
section shall enclose the full diameter of the saw blade and its outer edge shall not be less than 25 mm from
the face of the blade, H in Figure 2. The distance between the periphery of the largest specified blade to the
front edge of the base plate, F, shall be larger than 13 mm. The angle in Figure 1 shall be measured between
the intersections of the blade tip circle with the underside of the base and each side of the lower guard.
ISO 11148-12:2012(E)
a
c
Key
1 centre of blade
a
Blade periphery intersect point with the bottom plane of the base plate.
b
Blade exposure angle, α.
c
Blade periphery intersect point with the perpendicular projection on to the blade, of either side or the front tip of the
movable guard, which yields the largest blade exposure angle, α .
max
Figure 1 — Blade exposure angle
D
F
Key
1 outboard section of the base plate
D diameter of the blade
F dimension from the periphery of the largest specified blade to the front edge of the base plate measured along the
bottom surface of the base plate at maximum cutting depth; F > 13 mm
H dimension from the outside edge of the base plate on the blade side, to the near surface of the thickest specified
blade of a not inclined base plate; H ≥ 25 mm
Figure 2 — Guide plate dimensions
Reciprocating saws shall be equipped with a shoe or backing plate, which supports the reciprocating saw
against the work while a cut is being made.
6 © ISO 2012 – All rights reserved
b
H
ISO 11148-12:2012(E)
4.2.6 Run-down time
Circular saws shall have a run-down time after the stop command has been given of not more than 5 s.
4.2.7 Guards
4.2.7.1 Circular saws
Means shall be provided for affixing the safety guard(s) firmly to the saw.
Circular saws shall be provided with a guard above and below the guide plate to prevent unintentional contact of
hands with the inserted saw blade. The guard shall be designed to keep the saw blade cutting edge substantially
covered at all times, except that portion of the edge necessary to permit the blade to enter the work. It shall not
be possible to remove the guard without the aid of a service tool.
Key
1 auxiliary handle
2 guide plate
3 movable lower guard
4 guard-retracting handle
5 fixed guard
6 dust shoot
Figure 3 — Circular saw with a movable lower guard
ISO 11148-12:2012(E)
A saw with a movable lower guard, as illustrated in Figure 3, may include a guard-retracting handle. Such a
handle shall be designed so that whenever manipulating the handle, the operator’s fingers need not be in the
area where teeth are exposed. The portion of the handle intended to be grasped shall be remote from the teeth
or shall be separated from the teeth by a suitable guard, baffle or the like. The guard shall not be liable to jam
in any position during normal operation.
The guard shall:
a) except for panel saws and trim saws:
1) have a distance, a (see Figure 4), from the upper guard to the base plate of less than 38 mm, with the
blade set for a cut of maximum depth, and with the plane of the blade 90° from the plane of the base;
2) have a blade exposure angle (see Figure 1) of less than 25°;
a Distance from the upper guard to the base plate.
Figure 4 — Distance from the upper guard to the base plate
NOTE The guards of panel saws and trim saws are illustrated in Figure 5.

Key
1 stationary guard
Figure 5 — Panel saw safety guard
b) provide protection whenever the saw is at any other setting (i.e. depth and angle of cut) that its adjusting
means permits;
c) cover the blade teeth at least to the roots of the blade teeth; this requirement shall apply to resharpened
as well as to new blades;
d) provide protection such that a test probe (see Figure 6) of diameter 13 mm and length 50 mm, cannot touch
the blade teeth whenever advanced toward the blade from the front of the saw, perpendicular to the blade,
8 © ISO 2012 – All rights reserved
a
ISO 11148-12:2012(E)
parallel to the table and above the table. The saw is to be set for a 90° cut whenever the probe is applied.
The probe is to be first centred on the blade and then offset 13 mm to the right and 13 mm to the left of the
centre of the blade (see Figures 6 and 7);
Dimensions in millimetres
Figure 6 — Test probe
a
a
Key
1 test probe
a
Test probe off-set.
Figure 7 — Test probe advancement toward the saw blade
e) protect the operator from the teeth at the front and above the base;
An opening provided for the ejection of dust in the fixed guard of a circular saw shall conform to at least one
of the following.
— The opening shall be located beyond the outer circumference of the blade, including the teeth.
— A probe of 13 mm in diameter shall not contact the blade whenever inserted through the opening.
ø13
a
a
ISO 11148-12:2012(E)
The lower guard shall:
a) automatically retract to the closed position whenever the saw is not in use, regardless of the position of the
saw or the setting (depth and angle of cut).
b) Whenever released from its fully open position, the retractable guard shall move to its fully closed
position in a time no greater than 0,3 s. The fully open position is determined with the saw in a normal
cutting mode. Verification shall be carried out according to 5.4;
c) have no provision for being locked in the opening position;
d) be designed such that the saw blade can be removed without removing the safety guard from the saw;
e) prevent the fitting of a saw blade with a diameter larger than that recommended by the manufacturer of the
circular saw.
4.2.7.2 Oscillating saws
Oscillating saws do not require a guard.
4.2.7.3 Reciprocating saws
Reciprocating saws do not require a guard for the part of the saw blade which performs the sawing and is
situated below the guide plate. The part of the saw blade which is situated above the guide plate shall be
protected by a guard or the design shall be such that the risk of contact with the teeth of the blade and with
moving parts of the mechanism is prevented.
4.2.8 Power tool construction
The circular, oscillating or reciprocating saw shall be so designed and constructed as to prevent the loosening
or loss of components during expected use, including rough handling and occasional dropping, which can
compromise its safety functions. Verification shall be carried out in accordance with 5.6.
4.2.9 Riving knife
Circular saws intended for cutting wood shall be provided with a riving knife. The riving knife shall not be thicker
than the width of the cutting groove nor thinner than the saw blade body. For more detailed specifications, see
IEC 60745-2-5.
4.2.10 Blade mounting device — Reciprocating saws
The blade mounting device shall be capable of holding the blade securely during operation and shall have the blade-
holding mechanism so constructed as to minimize the likelihood of pinch points during intended use of the tool.
4.3 Thermal safety
Surface temperatures of parts of the circular, oscillating or reciprocating saw, which are held during use or that
can be inadvertently touched, shall follow the provisions of ISO 13732-1 and ISO 13732-3.
Pneumatic tools shall be so designed to minimize the cooling effects of exhaust air on the handles and other
gripping zones.
4.4 Noise reduction
The circular, oscillating or reciprocating saw shall be designed and constructed so that the emission of noise
is reduced to the lowest level, taking account of technical progress and the availability of means of reducing
noise, in particular at source. Principles for designing circular, oscillating and reciprocating saws with reduced
noise emission are contained in ISO/TR 11688-1 and ISO/TR 11688-2.
10 © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
The noise emission from using circular, oscillating and reciprocating saws has three main sources:
— the circular, oscillating or reciprocating saw itself;
— the inserted tool;
— the workpiece.
NOTE Generally the noise emitted due to the characteristics of the workpiece cannot be controlled directly by the
manufacturer of the circular, oscillating or reciprocating saw.
Typical sources of noise emitted by the circular, oscillating or reciprocating saw itself are
a) the motor and drive mechanism,
b) the exhaust air or gases, and
c) vibration or impact-induced noise.
Where the exhaust air or gases are the major contributor to the noise, means to reduce the noise, for example
a silencer or equivalent means, shall be included in the design.
Alternatively, where practicable, the exhaust air or gases can be piped away from the operator in a hose.
Vibration-induced noise can often be reduced by vibration isolation and damping.
This list is not exhaustive; where alternative technical measures for noise reduction, with greater efficiency, are
available, they should be used by the manufacturer.
4.5 Vibration
The circular, oscillating or reciprocating saw shall be designed and constructed so that the vibration is reduced
to the lowest level at the handles and at any other parts of the tool in contact with the operator’s hands,
taking account of technical progress and the availability of means of reducing vibration, in particular at source.
Principles for designing circular, oscillating and reciprocating saws with reduced vibration emission are
contained in CR 1030-1.
Typical sources of vibration emitted by a circular, oscillating and reciprocating saws are
— unbalance of rotating parts,
— poorly designed motors and gears, and
— resonances in the structure of the machine, particularly the handles and their mounts.
The following design features have been found to be effective and should be considered by manufacturers
whenever designing circular, oscillating and reciprocating saws:
a) autobalancers;
b) increasing inertia;
c) isolated casing or handles.
This list is not exhaustive; where alternative technical measures for vibration reduction, with greater efficiency,
are available, they should be used by the manufacturer.
ISO 11148-12:2012(E)
4.6 Materials and substances processed, used or exhausted
4.6.1 Exhaust air or gas
Circular, oscillating and reciprocating saws driven with compressed air or gas shall be designed in such a way
that exhaust air or gases are directed so as not to cause a hazard to the operator and so that any other effects,
such as blowing the dust and reflected air or gas from the workpiece on to the operator, are minimized.
4.6.2 Dust and fumes
So far as is reasonably practicable, the circular, oscillating or reciprocating saw shall be designed to facilitate the
collection and removal or suppression of airborne dust particles and fumes generated by the work process. The
user instructions shall include sufficient information to enable adequate control of the risks from dust and fumes.
4.6.3 Lubricants
Where specifying lubricants, the manufacturer shall take environmental and occupational health aspects
into account.
4.7 Ergonomics
4.7.1 Design of the handle
Gripping areas of the circular, oscillating and reciprocating saws shall be designed to provide convenient,
effective means for the operator to exercise full control over the circular, oscillating or reciprocating saw.
Handles and other parts used for gripping the circular, oscillating or reciprocating saw shall be designed to
ensure that the operator is able to grip the circular, oscillating or reciprocating saw correctly and to perform the
expected work. Handles shall suit the functional anatomy of the hand and the dimensions of the hands of the
operator population.
NOTE Further guidance on ergonomic design principles can be found in EN 614-1.
Circular, oscillating and reciprocating saws having a mass greater than 2 kg (including the inserted tool) shall
be capable of being supported by two hands while being lifted or operated.
The grip shall be such that normal feed force and reaction torque can be transmitted in an ergonomic way from
the hand of the operator to the circular, oscillating or reciprocating saw.
The strength of a removable handle and the nature of fixing it shall be appropriate to the intended principal use.
4.7.2 Suspension device
Provision should be made, where appropriate, to enable the attachment to the circular, oscillating or reciprocating
saw of a suspension device in order to reduce, where practicable, the physical strain placed on the operator by
the weight of the circular, oscillating or reciprocating saw. The fitting of a suspension device shall not introduce
an additional hazard.
4.8 Controls
4.8.1 Start-and-stop device
Circular, oscillating and reciprocating saws shall be equipped with a single control device to start or stop them.
It shall be adapted to the handle, or to the part of the circular, oscillating or reciprocating saw being gripped,
so that it can be held comfortably in the run position, and so that the operator can activate it without releasing
the grip on the handles.
12 © ISO 2012 – All rights reserved

ISO 11148-12:2012(E)
Start-and-stop devices shall be so designed that the inserted tool ceases to be powered when the start-and-
stop device is released. Without manual effort and whenever completely released, the device shall move to the
stop position, i.e. shall be of the hold-to-run type.
Start-and-stop devices shall be in the stop position or immediately move to the stop position whenever the
circular, oscillating or reciprocating saw is connected to the energy supply.
It shall not be possible to lock the start-and-stop device in the running position.
4.8.2 Unintentional start
The start-and-stop device shall be so designed, positioned or guarded that the risk of unintentional start is
minimized. Verification shall be carried out according to 5.5.
Circular and reciprocating saws shall have lock-off start-and-stop devices.
4.8.3 Actuating forces
For circular, oscillating and reciprocating saws, which are intended to start frequently or are intended to be
used for precision work, the actuating force shall be small.
For circular, oscillating and reciprocating saws, which are normally used in operations of long duration, the
force to keep the start device in the run position shall be small.
NOTE For further information on trigger forces for control devices, see EN 894-3.
5 Verification
5.1 General conditions for tests
Tests according to this part of ISO 11148 are type tests.
5.2 Noise
The noise emission values shall be measured and declared in accordance with ISO 15744.
Compliance with 4.4 may be verified through the comparison of the noise-emission values with those for other
machines of the same family, or with machines of similar size and performance characteristics.
5.3 Vibration
For reciprocating, oscillating and small circular saws, the vibration total value shall be measured and reported
in accordance with ISO 28927-8. For circular saws intended for cutting wood, the vibration total value shall be
measured and reported in accordance with ISO 20643.The vibration emission value, and its uncertainty, shall
be declared in accordance with EN 12096.
NOTE Useful information about operating conditions during vibration tests on circular saws intended for cutting wood
can be found in IEC 60745-2-5.
Compliance with 4.5 may be verified through the comparison of the vibration-emission values with those for
other machines of the same family, or machines of similar size and performance characteris
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