SIST EN ISO 10821:2005

SLOVENSKI STANDARD
01-november-2005
Industrijski šivalni stroji – Varnostne zahteve za šivalne stroje, enote in sisteme
(ISO 10821:2005)
Industrial sewing machines - Safety requirements for sewing machines, units and
systems (ISO 10821:2005)
Industrienähmaschinen - Sicherheitsanforderungen an Nähmaschinen, Näheinheiten und
Nähanlagen (ISO 10821:2005)
Machines a coudre industrielles - Exigences de sécurité pour machines a coudre, unités
et systemes de couture (ISO 10821:2005)
Ta slovenski standard je istoveten z: EN ISO 10821:2005
ICS:
61.080 âLYDOQLVWURMLLQGUXJDRSUHPD Sewing machines and other
]DREODþLOQRLQGXVWULMR equipment for the clothing
industry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10821
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2005
ICS 61.080
English Version
Industrial sewing machines - Safety requirements for sewing
machines, units and systems (ISO 10821:2005)
Machines à coudre industrielles - Exigences de sécurité Industrienähmaschinen - Sicherheitsanforderungen an
pour machines à coudre, unités et systèmes de couture Nähmaschinen, Näheinheiten und Nähanlagen (ISO
(ISO 10821:2005) 10821:2005)
This European Standard was approved by CEN on 22 April 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10821:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 10821:2005) has been prepared by Technical Committee ISO/TC 148
"Sewing machines" in collaboration with CMC.

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 January 2006, and conflicting national
standards shall be withdrawn at the latest by January 2006.

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(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 10821:2005 has been approved by CEN as EN ISO 10821:2005 without any
modifications.
ANNEX ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37 EEC

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 98/37 EEC.

Once this standard is cited in the Official Journal of the European Communities under that
Directive and has been implemented as a national standard in at least one Member State,
compliance with the normative clauses of this standard given in Table ZA. 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 10821
First edition
2005-07-01
Industrial sewing machines — Safety
requirements for sewing machines, units
and systems
Machines à coudre industrielles — Exigences de sécurité pour
machines à coudre, unités et systèmes de couture

Reference number
ISO 10821:2005(E)
©
ISO 2005
ISO 10821:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope .1
2 Normative references .1
3 Terms and definitions .3
4 Significant hazards.5
4.1 General.5
4.2 Mechanics.5
4.3 Electricity/Control.6
4.4 Thermal hazards .6
4.5 Noise .6
4.6 Radiation.6
4.7 Ergonomics .7
4.8 Special hazards.7
4.9 Danger zones .8
5 Safety measures and requirements.15
5.1 General principles.15
5.2 Requirements for all types of industrial sewing machines.15
5.2.1 Mechanical equipment .15
5.2.2 Electrical equipment/control/control gear .18
5.2.3 Thermal requirements .20
5.2.4 Noise .20
5.2.5 Radiation.21
5.2.6 Ergonomics .22
5.3 Specific requirements for particular types of industrial sewing machines.22
5.3.1 Button, buttonhole and programmable pattern sewing machines, bartacking machines.22
5.3.2 Quilting machines.23
5.3.3 Bag closing sewing machines in the packaging industry.23
5.3.4 Embroidery machines .23
5.3.5 Glove sewing machines .24
5.3.6 Sewing machines for shoe repair .24
5.3.7 Blindstitch sewing machines .24
5.3.8 Linking machines.24
6 Verification of safety requirements or measures .24
7 Information on use and maintenance.26
7.1 General.26
7.2 Marking .26
7.3 Warning of residual risk.27
7.4 Instructions .27
7.4.1 General information.27
7.4.2 Particular information .28
Annex A (normative) Finger deflecting device.29
Annex B (normative) Warning of residual risk.32
Annex C (normative) Noise test code .35
Annex D (normative) Needle breakage protection shield .50
Annex E (normative) Belt guard at sewing machine drive (motor).51
ISO 10821:2005(E)
Annex F (informative) Safe fastening of belt pulley at drive shaft of clutch or positioning drives . 53
Annex G (informative) Safe mounting of adaptable positioner/synchronizer at sewing machine shaft . 60
Annex H (informative) Safe mounting of sewing machine drives . 61
Annex I (informative) Noise declaration examples. 66
Annex J (informative) Examples of noise reduction measures at the design stage . 69
Annex K (normative) Written warning — Languages . 70
Annex L (informative) Ergonomic principles . 74
Bibliography . 75

iv © ISO 2005 – All rights reserved

ISO 10821:2005(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 10821 was prepared by Technical Committee ISO/TC 148, Sewing machines.
ISO 10821:2005(E)
Introduction
This International Standard is intended to provide manufacturers, users and official bodies with safety
requirements which, in view of the state of the art, are to be met for industrial sewing machines, units and
systems.
For machinery and hazards not within the scope of this International Standard, see ISO 12100-1 and
ISO 12100-2.
The concept of this International Standard is to deal first in general and then in detail with significant hazards
(see Clause 4), as well as safety requirements (see Clause 5); it starts with those requirements applicable to
all types of industrial sewing machines in order to arrive at specific requirements for particular types of
machines.
A peculiarity of industrial sewing machines is that sewing units and systems are frequently built up by the user
from components emanating from various manufacturers. Furthermore, in the course of their period of use,
units and systems may be adapted by the user for different tasks (owing to, for example, frequent changes in
fashion) by means of the interchange of components or the addition of supplementary equipment. Such
measures can also serve the purpose of increasing the degree of automation. As a result, the user who
assembles several components into a new sewing unit or system is in the position of a manufacturer and thus,
like the manufacturer, is responsible for assuring that any hazards inherent in the operation of the new
combination are eliminated, and that it conforms to this International Standard and any other relevant standard
or regulation.
vi © ISO 2005 – All rights reserved

INTERNATIONAL STANDARD ISO 10821:2005(E)

Industrial sewing machines — Safety requirements for sewing
machines, units and systems
1 Scope
This International Standard identifies hazards and specifies safety requirements applicable to sewing
machines, sewing units and sewing systems designed for professional (industrial, commercial or laboratory)
use in industries including the clothing and footwear, leather goods, shirts and blousery, hosiery and knitwear,
lingerie, glove, upholstery and packaging industries, and in shoe repair.
The information on use and maintenance of such machines in other industries could give rise to hazards not
considered in this International Standard.
The requirements of this International Standard are applicable to machinery installed in dry and well-kept,
clean locations and processing dry sewing material. Where the sewing machines, sewing units or sewing
systems are used in other than dry and well-kept, clean locations, more stringent measures could be
[5]
necessary: for example, the higher degree of protection provided by enclosures (IP code — see IEC 60529) .
The purpose of this International Standard is to assist the manufacturer to design machinery such that the
risks arising from its defined, intended use and maintenance are reduced or eliminated. The significant
hazards and hazardous situations are given together with a reference to the corresponding safety requirement
or measure in 4.2 to 4.8. Significant hazards are those identified and estimated as requiring action to reduce
the risk they pose.
This International Standard is not applicable to stepping frame sewing machines, shoe bottom stitching
[1]
machines, large shuttle embroidery machines in accordance with ISO 11111 , integrated sewing systems
[2] [4]
within in the scope of ISO 11161 or household sewing machines in accordance with IEC 60335-2-28 .
NOTE If household sewing machines are used for professional purposes, it could be necessary to take measures in
accordance with this International Standard (e.g. the use of a finger deflecting device).
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 286 (all parts), ISO system of limits and fits
ISO 639 (all parts), Codes for the representation of names of languages
ISO 2768 (all parts), General tolerances
ISO 3740:2000, Acoustics — Determination of sound power levels of noise sources — Guidelines for the use
of basic standards
ISO 3741:1999, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Precision methods for reverberation rooms
ISO 10821:2005(E)
ISO 3743-1:1994, Acoustics — Determination of sound power levels of noise sources — Engineering methods
for small, movable sources in reverberant fields – Part 1: Comparison method for hard-walled test rooms
ISO 3744:1994, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering method in an essentially free field over a reflecting plane
ISO 3745:2003, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Precision methods for anechoic and semi-anechoic rooms
ISO 3746:1985, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Survey method using an enveloping measurement surface over a reflecting plane
ISO 3747:2000, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Comparison method in situ
ISO 3864-2:2004, Graphical symbols — Safety colours and safety signs — Part 2: Design principles for
product safety labels
ISO 4183:1995, Belt drives — Classical and narrow V-belts — Grooved pulleys (system based on datum
width)
ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment
ISO 4915:1991, Textiles — Stitch types — Classification and terminology
ISO 4916:1991, Textiles — Seam types — Classification and terminology
ISO 7574 (all parts), Acoustics — Statistical methods for determining and verifying stated noise emission
values of machinery and equipment
ISO 8239:1987, Sewing machine needles — Fitting dimensions — Tolerances and combinations
ISO/CIE 8995:2002, Lighting of indoor work systems
ISO 9614-1:1993, Acoustics — Determination of sound power levels of noise sources using sound intensity —
Part 1: Measurement at discrete points
ISO 9614-2:1996, Acoustics — Determination of sound power levels of noise sources using sound intensity —
Part 2: Measurement by scanning
ISO 11200:1995, Acoustics — Noise emitted by machinery and equipment — Guidelines for the use of basic
standards for the determination of emission sound pressure levels at a work station and at other specified
positions
ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Engineering method in an
essentially free field over a reflecting plane
ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Survey method in situ
ISO 11203:1995, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions from the sound power level
ISO 11204:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Method requiring environmental
corrections
ISO/TR 11688-1:1995, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning
2 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology
ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical
principles
ISO 13849-1:1999, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13852:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the
upper limbs
ISO 13853:1998, Safety of machinery — Safety distances to prevent danger zones being reached by the
lower limbs
ISO 13854:1996, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
IEC 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60204-31:2001, Safety of machinery — Electrical equipment of machines — Part 31: Particular safety and
EMC requirements for sewing machines, units and systems
IEC 60745-1:2003, Hand-held motor-operated electric tools — Safety — Part 1: General requirements
IEC 60825-1:2005, Safety of laser products — Part 1: Equipment classification, requirements and user's guide
EN 563, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish
temperature limit values for hot surfaces
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4915, ISO 4916, ISO 11204,
ISO 12100-1 and ISO/IEC Guide 51, and the following apply.
3.1
industrial sewing machine
sewing machine specifically designed for industrial purposes
3.2
sewing machine
machine designed to produce one or more stitches with one or more sewing threads; in producing a seam the
machine can perform one or more sewing functions
NOTE 1 See ISO 4915 and ISO 4916 for stitches and seams, respectively.
NOTE 2 Previously, the term “sewing machine head” was used instead of “sewing machine”.
3.3
sewing machine stand
item on which a sewing machine is arranged to enable optimum operation
EXAMPLE Sewing machine stand designed as a table.
3.4
sewing machine drive
equipment that drives a sewing machine, speed-controlled by electrical or mechanical means, or both, either
with or without a positioning device and control of machine functions
EXAMPLE Electric motor.
ISO 10821:2005(E)
3.5
sewing unit
equipment consisting of at least a sewing machine, sewing machine stand and sewing machine drive
NOTE One or more devices incorporated in, or attached to, the sewing machine, sewing unit or both (e.g. for sewing,
cutting, feeding the sewing material) are, in addition to the sewing machine itself, controlled either by the operator or
automatically.
3.6
sewing system
equipment consisting of at least two sewing units or parts of sewing units, functionally interlinked
3.7
quilting machine
specially constructed sewing unit or sewing system designed for use in the upholstery industry
EXAMPLES Tape edge machine, multi-needle sewing machine, long-arm quilting machine, tacking machine.
3.8
sewing tool exchange and adjustment
threading a needle, looper, spreader, or changing a presser foot, bobbin, needle plate, sewing machine
needle, or action such as cleaning
3.9
multihead embroidery machine
sewing system that allows two or more embroidery heads to be modularly linked together
3.10
sewing area
effective range around sewing machine needle between needle plate and the upper turning point of the needle
movement
3.11
finger deflecting device
means of preventing access of fingers into the danger zone of the sewing area
3.12
cutter system
devices for cutting sewing threads, tape or sewing material
3.13
auxiliary equipment
additional device that assists in handling procedures
4 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
4 Significant hazards
4.1 General
This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with
in this International Standard, identified by risk assessment as significant for this type of machine and which
require action to eliminate or reduce the risk. Before using this International Standard it is important to carry
out a risk assessment of the machine to check that its hazards are those identified in this clause.
Danger zone or hazardous situation Type of hazard Corresponding reference
(see Clauses 5 and 7)
4.2 Mechanics
4.2.1 Sewing area (Zone I):
movements of the
a) sewing machine needle, stabbing or puncture 5.2.1.1, Annex A
b) cutter system, cutting or severing 5.2.1.2, Annexes B and L
c) feeding system, crushing, shearing, drawing-in or 5.2.1.3
trapping
d) shuttle/hook/looper assembly, or drawing-in or trapping, impact, 5.2.1.4, 5.2.2.3, Annexes B
stabbing or puncture and L
e) movement due to sewing tool crushing, trapping, shearing, 5.2.1.5, Clause 7, Annexes B
exchange and adjustment — impact and L
unintentional operation of the
pedal when the machine is not
switched “OFF” or during last
runnings.
4.2.2 Sewing machine (Zone II):
movement of the
a) needle bar, or impact 5.2.1.6
b) thread take-up lever for needle impact 5.2.1.7
thread, looper thread, etc.
4.2.3 Drive (Zone III):
a) handwheel, drawing-in or trapping 5.2.1.8
b) pulley/belt drive at sewing drawing-in or trapping, severing 5.2.1.9, Annexes E and F
machine,
c) pulley/belt drive at sewing drawing-in or trapping, severing 5.2.1.10, Annex E, F and H
machine drive (motor).
4.2.4 Tilting area: falling down/out crushing, shearing 5.2.1.11, Clause 7
of the uptilted machine by gravity.
4.2.5 Auxiliary equipment: for crushing, shearing, entanglement, 5.2.1.12
example, additional feeding, folding, drawing-in or trapping, impact
transfer, separating, stacking system
at automated sewing systems.
ISO 10821:2005(E)
Danger zone or hazardous situation Type of hazard Corresponding reference
(see Clauses 5 and 7)
5.2.2.1
4.3 Electricity/Control
4.3.1 Electrical contact (direct or
indirect), caused by
a) component failure, electric shock or burns
b) insulation failure, or electric shock or burns
c) incorrect design, installation or burns
component specification of the
electrical equipment.
4.3.2 Functional disorders: all possible hazards generated by 5.2.2.1, 5.2.2.2, 5.2.2.4 to 5.2.2.13,
unexpected dangerous Annex G
movements
a) failure of control system (e.g.
malfunction of safety devices,
unexpected start),
b) irregularity of energy supply
(e.g. loss, recurrence,
fluctuation).
4.3.3 Electrostatic phenomena sudden fright caused by 5.2.2.14
electrostatic discharge
4.3.4 External influences (e.g. unexpected dangerous movement 5.2.2.15
EMC)
4.4 Thermal hazards
Accidental contact with hot burns 5.2.3
surfaces:
a) sewing lamp head (needle
light);
b) drives (e.g. motors);
c) machine surface.
4.5 Noise
Drive or transmission. temporary or permanent loss of 5.2.4, 7.4.1 i), Annexes C, I and J
hearing; other physiological
disorders (e.g. loss of balance,
loss of awareness); interference
with oral message and other
acoustical signals
4.6 Radiation
Eye contact with laser marker. temporary or general loss of 5.2.5, Clause 7
eyesight
6 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Danger zone or hazardous situation Type of hazard Corresponding reference
(see Clauses 5 and 7)
4.7 Ergonomics
This covers
a) unhealthy posture (e.g. chair, risk of occupational disease, 5.2.6, Annex L
height of chair and sewing accelerated fatigue, posture
table), diseases
b) inadequacy with human hand, accelerated fatigue
arm or foot, leg anatomy (e.g.
arm position while sewing,
knee actuator for presser foot
lifting),
c) inadequate local lighting (e.g. eye strain
bad visibility in sewing area),
and
d) unhealthy exposure to the jet cold, muscle strain 5.2.6.3
of air from pneumatic
equipment or cooling air from
a motor
4.8 Special hazards
4.8.1 Button sewing machine,
buttonhole sewing machine,
bartacking machine,
programmable pattern sewing
machine:
facial injuries (especially eyes), 5.3.1, Annex D
 ejection of parts (e.g. splinted
caused by stabbing or puncture
or broken sewing machine
needle)
4.8.2 Quilting machine drawing-in 5.3.2
4.8.3 Bag closing sewing drawing-in 5.3.3
machine
4.8.4 Embroidery machine drawing-in 5.3.4
stabbing or puncture 5.3.5
4.8.5 Glove sewing machine
4.8.6 Sewing machine for shoe stabbing or puncture 5.3.6
repair
4.8.7 Blind stitch sewing stabbing or puncture 5.3.7
machine
4.8.8 Linking machines stabbing or puncture 5.3.8

ISO 10821:2005(E)
4.9 Danger zones
Figures 1 to 7 show different types of industrial sewing machines, indicating the danger zones and some
details of construction. These figures are shown for information only.

Key
1 zone I
2 zone II
3 zone III
Figure 1 — Danger zones — Mechanics (see 4.2)
8 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Key
1 zone I
2 zone III
Figure 2 — Danger zones — Mechanics (see 4.2)
ISO 10821:2005(E)
Key
1 zone I
2 zone II
3 zone III
Figure 3 — Danger zones — Mechanics (see 4.2)
10 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Key
1 zone I
2 zone II
a
3 laser
a
See 4.6.
Figure 4 — Danger zones — Mechanics and radiation (see 4.2 and 4.6)
ISO 10821:2005(E)
Figure 5 — Danger zones — Zone I (see 4.2.1): hook with horizontal axis

Figure 6 — Danger zones — Zone I (see 4.2.1): hook with vertical axis
12 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Key
1 zone I
2 zone II
Figure 7 — Danger zones — Zone I (see 4.2.1): looper; Zone II (see 4.2.2): thread take-up
ISO 10821:2005(E)
Figure 8 — Danger zones — Zone II (see 4.2.2): thread take-up
14 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
5 Safety measures and requirements
5.1 General principles
5.1.1 Sewing machines, units and systems shall comply with the safety requirements and/or protective
measures of this clause (and of Clause 7). In addition, they shall be designed according to the principles of
ISO 12100 for hazards relevant but not significant, which are not dealt with by this document (e.g. sharp
edges).
5.1.2 Gaps between moving surfaces shall not exceed 8 mm where there exists a risk of trapping, severing,
crushing or shearing. One possible solution for ensuring the safety of the machines is the provision of safety
distances that prevent danger zones from being reached which are in accordance with ISO 13852, ISO 13853
and ISO 13854.
5.1.3 Safeguarding techniques are not required if the maximum force of a moving part is limited to 50 N and
the contact pressure to 50 N/cm .
5.2 Requirements for all types of industrial sewing machines
5.2.1 Mechanical equipment
5.2.1.1 Sewing machine needle
Unless otherwise required for particular machine types in other clauses of this document, hazards caused by
needle movement shall be eliminated by means of a safeguard device. This requirement is considered to have
been met when a finger-deflecting device is used, or when the position of the needle in relation to other
devices mounted on the sewing machine (roller foot, spreader, looper, needle cooling tube, feed-in devices,
angular tape guide, binder etc.) prevents access of fingers to the sewing machine needle (see Annex A).
Needle breakage protection is only required for specific machines as specified in 5.3.1.
5.2.1.2 Cutter system
The cutter systems such as sewing thread, tape or sewing material cutting device should be designed so that
the opening width of the cutter is limited to less than 8 mm. When, due to the sewing operation (e.g. sewing of
quilted material), the opening width exceeds 8 mm, this shall be indicated in the instructions (see Clause 7),
and, in addition, Form A of the warning sign in accordance with Figure B.1 or ISO 3864:1984, Figure B.3.1,
shall be affixed in or near the danger zone. This applies, for example, to lining stitch-in machines in the shoe
industry, to sewing units for thick material in the upholstery industry and to bag closing sewing machines in the
packaging industry (see 5.3.3), and to other cases where the specific sewing operation does not allow the use
of a protective device.
5.2.1.3 Feeding area
The instructions (see Clause 7) shall contain information on the correct use of hazardous feeding elements
which cannot be safeguarded completely.
NOTE Feeding elements such as a feed dog, feeding chain, presser foot, roller foot and puller feed generally involve
low risk.
ISO 10821:2005(E)
5.2.1.4 Shuttle/hook/looper assembly
Hazards caused by movements of stitch forming and thread guiding means shall be eliminated by guards
such as casings or covers as far as the sewing process allows (see examples in Figures 7 and 8). The
casings/covers need not be interlocked with the sewing machine drive and at the same time will be able to be
opened without any tools (see also 5.2.2.3).
To prevent injury during threading, changing bobbins or needles, cleaning, etc., Form B or C of the warning
sign according to Annex B (see Clauses B.3 and B.4), shall be affixed in or near the danger zone.
5.2.1.5 Sewing tool exchange and adjustment
To enable safe threading, changing of bobbin, looper or needle, cleaning, etc., a main switch in accordance
with IEC 60204-31:2001, 5.3, shall be installed.
Warning sign, Form B or C (see Clause B.3 or B.4), shall be affixed according to Annex B.
5.2.1.6 Top of needle bar
The operator shall be protected against impact by the top of the needle bar. Guards such as a bow or stake
are suitable (see examples in Figure 8).
5.2.1.7 Thread take-up lever for needle thread, looper thread, etc.
A guard against an impact hazard, such as a cover, bow or stake, shall be provided (see examples in Figure
8). Movable guards need not be interlocked with the sewing machine drive and will be able to be opened
without tools (see also 5.2.2.3).
This requirement does not apply to machines with slow operating speeds (< 500 stitches per minute, e.g.
shoe-repairing machines).
5.2.1.8 Handwheel
Any accessible area on rotating handwheels not fully covered while sewing shall be smooth and shall not have
spokes, hazardous openings exceeding 8 mm, protrusions or webs.
The main direction of rotation shall be clearly and visibly marked on the sewing machine (e.g. within the hand
wheel area, see Figure 9).
5.2.1.9 Pulley/belt drive at sewing machine
If the power transmission from motor to handwheel is obtained by an externally running belt, the belt intake
point shall be guarded to avoid injury to the operator's fingers [see Figure 9 and Figure E.1a)].
If the distance between the belt and the border of the table top opening exceeds 8 mm, a belt guard shall be
provided to reduce the distance to 8 mm or less (see Figure 9 as an example of complete guarding).
16 © ISO 2005 – All rights reserved

ISO 10821:2005(E)
Figure 9 — Example of belt guard
5.2.1.10 Pulley/belt drive at sewing machine drive (motor)
The belt intake point at the pulley of the sewing machine drive shall be guarded so that fingers cannot reach
the danger area. This requirement is met when the guard satisfies the requirements of Annex E.
In order to prevent the belts falling off the belt pulley when the sewing machine is being tilted or lowered, a
device according to Annex E shall be provided.
NOTE 1 Due to the frequent motor actuation required and, consequently, the high load of the belt pulleys, belt pulleys
and drive shafts with taper fit should be used (see Annex F).
NOTE 2 For safe mounting of sewing machine drives, the requirements of Annex H should be followed.
5.2.1.11 Tiltable sewing machines
The sewing machine shall be secured in the frame or table so that, when tilted, it cannot fall out or accidentally
drop back.
This requirement is considered to have been met if, for example, the tilted position of the sewing machine is
stable or if a locking device is available.
Further information shall be given in the instructions (see Clause 7).
ISO 10821:2005(E)
5.2.1.12 Auxiliary equipment
Considering the diversity of possible auxiliary equipment, the manufacturer shall carry out a risk assessment
for defining the required safety measures, taking account of the following.
On auxiliary equipment such as additional feeding, folding, binding, transfer, separating and stacking systems,
access to crushing and shearing points shall be prevented by guards, e.g. fencing, covers.
Swivel, flip-over and roll type stackers used on sewing units or sewing systems shall be secured by deterring
or impeding devices such as bows or stakes.
5.2.1.13 Stability of the sewing unit
The sewing unit shall be stable in a tilting range of 15° based on a horizontal floor.
5.2.2 Electrical equipment/control/control gear
5.2.2.1 General
Electrical systems and equipment for industrial sewing machines shall be in accordance with IEC 60204-31.
All operator-related controls requiring adjustment for changing the working process shall be located outside
the electric cabinet.
Machines with several operating modes shall be equipped with a mode-selection device that indicates the
mode (e.g. automatic operation, hand-controlled operation, adjustment).
NOTE In general, for sewing machines the different operating modes do not present different safety levels.
In general, on sewing units and systems on which the hazardous movement of parts is limited to parts of the
sewing machine itself (e.g. stitch forming elements, feed) protective interlocking is not required.
5.2.2.2 Redundancy/diversity
On sewing units and systems on which the hazardous movement of parts is limited to parts of the sewing
machine itself (e.g. stitch-forming elements, feed), provision of redundancy or use of diversity is not required
(see 5.2.2.13).
5.2.2.3 Movable protection device
Movable protection devices (e.g. needle plate, bed slide, cover for stitch forming and thread-guiding elements)
need not be linked to any safety control system (see 5.2.1.4).
5.2.2.4 Starting conditions for automatic start-up by closing a movable or sensitive protection
device
The automatic start-up of automatically or semi-automatically operated sewing units or systems shall be
achieved by one of the following:
 for machines requiring an intervention within the danger zones during each sewing cycle, by closing of
the protective guard or clearing the danger zone at the least;
 for machines requiring occasional intervention into danger zones, by the additional actuation of a push
button.
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ISO 10821:2005(E)
5.2.2.5 Starting conditions for sewing units
For sewing units having no hazardous movements other than those of the stitch-forming elements, the sewing
operation may be initiated by a sensor system (light barrier, air flow barrier, feeler, etc.) actuated by the
sewing material. If a unit has different starting modes, where starting is by a sensor system, a visual indication
such as a lamp shall be provided.
5.2.2.6 Means for actuating a sewing unit
Manual controls that create h
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