SIST EN 12267:2003

SLOVENSKI STANDARD
SIST EN 12267:2003
01-julij-2003
Stroji za predelavo hrane - Krožne žage - Varnostne in higienske zahteve
Food processing machinery - Circular saw machines - Safety and hygiene requirements
Nahrungsmittelmaschinen - Kreissägemaschinen - Sicherheits- und
Hygieneanforderungen
Machines pour les produits alimentaires - Scies circulaires - Prescriptions relatives a la
sécurité et a l'hygiene
Ta slovenski standard je istoveten z: EN 12267:2003
ICS:
67.260 Tovarne in oprema za Plants and equipment for the
živilsko industrijo food industry
SIST EN 12267:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 12267
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2003
ICS 67.260
English version
Food processing machinery - Circular saw machines - Safety
and hygiene requirements
Machines pour les produits alimentaires - Scies circulaires Nahrungsmittelmaschinen - Kreissägemaschinen -
- Prescriptions relatives à la sécurité et à l'hygiène Sicherheits- und Hygieneanforderungen
This European Standard was approved by CEN on 9 January 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12267:2003 E
worldwide for CEN national Members.

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EN 12267:2003 (E)
Contents
page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .7
3 Terms and definitions.8
4 List of hazards.8
4.1 General.8
4.2 Mechanical hazards .8
4.3 Electrical hazards .10
4.4 Hazard from loss of stability.10
4.5 Noise hazard.10
4.6 Hazards from non-compliance with ergonomic principles .11
4.7 Hazards from non-compliance with hygiene principles .11
5 Safety requirements and/or measures .11
5.1 General.11
5.2 Mechanical hazards .11
5.3 Electrical hazards .14
5.4 Hazard from loss of stability.16
5.5 Noise hazard.16
5.6 Ergonomic requirements .17
5.7 Hygiene and cleaning .17
6 Verification of safety requirements and/or measures.18
7 Information for use .19
7.1 General.19
7.2 Operating instruction .19
7.3 Operator training.21
8 Marking .21
Annex A (normative) Noise test code for circular saw machines (grade 2).22
Annex B (normative) Design principles to ensure cleanability of circular saw machines.24
Annex C (normative) Common hazards for food processing machines and reduction requirements
applicable to circular saw machines .29
Annex ZA (informative) Relationship of this document with EC Directives.31
Bibliography .32
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EN 12267:2003 (E)
Foreword
This document (EN 12267:2003) has been prepared by Technical Committee CEN TC 153 “Food processing
machinery – Safety and hygiene requirements”, the secretariat of which is held by DIN.
It has been prepared by Working Group 2 "Meat Processing Machinery" of CEN/TC 153.
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 October 2003, and conflicting national standards shall be withdrawn at the latest
by October 2003.
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 EC Directive(s).
For relationship with EC Directives, see informative Annex ZA, which is an integral part of this document.
It is one of a series of standards which have been prepared for machines and equipment for meat processing in
compliance with EN 1672-2:1997 and annex C and attends to machines, which are attached by Annex IV of
Machinery Directive 98/37/EC.
Annexes A, B and C are normative.
This European Standard also contains a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
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EN 12267:2003 (E)
Introduction
This European Standard covers
Circular saw machines standing on the floor and
Circular saw machines installed in a cutting line.
The extent to which hazards are covered is indicated in this European Standard. For other hazards which are not
covered by this European Standard, machinery should comply with EN 292 where applicable.
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EN 12267:2003 (E)
1 Scope
This European Standard specifies requirements for the design and manufacturing of circular saw machines (see
Figures 1 and 2).
The machines covered by this European Standard are used to cut bone and meat.
The circular saw machines covered by this European Standard do not include circular saw machines for processing
of wood and similar materials and the requirements of EN 1870-1 do not apply.
Circular saw machines for domestic use are not included in this European Standard.
This European Standard applies only to machines which are manufactured after the date of issue of this European
Standard.
This European Standard covers the following types of machines:
Circular saw machines with a feed table and a fixed product pusher
The distance „A“ from the floor to the top surface of the feed table is from 800 mm to 1050 mm. The saw blade
diameter is between 350 mm and 400 mm (see Figure 1).
Circular saw machines installed in a cutting line (e.g. conveyor belt or roller conveyor), e.g. with a protective
component which can be lifted on the feed and discharge side. The saw blade diameter is between 350 mm
and 400 mm (see Figure 2).
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EN 12267:2003 (E)
Key
1 Product pusher 1 Protective hood
2 Handle 2 Roller conveyor or belt conveyor
3 Feed table 3 Feed side
4 Interlocking switch for feed table 4 Casing
5 ON / OFF switch 5 Chip pan
6 Chip pan
7 Operator side
8 Protective hood
9 Hinge
10 Saw blade 350 mm - 400 mm diameter
11 Interlocking switch for chip pan
12 Machine rack
13 Locking device
Figure 1 — Circular saw machine with machine base Figure 2 — Circular saw machine in cutting line
Circular saw machines comprise a machine base, a fixed, foldable feed table, a product pusher, a protective hood
which can be lifted, a saw blade, a drive and electrical components, depending on machine type.
Circular saw machines with a machine base can be wheel-mounted (see Figure 1).
The intended uses of the machines are described in clause 7.
On floor-type circular saw machines (see Figure 3) the product to be cut is placed by hand onto the feed table and
pushed against the cutting zone of the saw blade by means of the product pusher and sawed.
On circular saw machines which are installed in a cutting line (see Figure 4) the product to be cut is pushed by
hand via the conveyor belt or roller conveyor against the cutting zone of the saw blade and sawed.
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EN 12267:2003 (E)
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 292-1, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology,
methodology.
EN 292-2:1991, Safety of machinery - Basic concepts, general principles for design - Part 2: Technical principles
and specifications.
EN 614-1, Safety of machinery - Ergonomic design principles - Part 1: Terminology and general principles.
EN 953:1997, Safety of machinery – Guards - General requirements for the design and construction of fixed and
movable guards.
EN 954-1:1996, Safety of machinery - Safety-related parts of control systems - Part 1: General principles for
design.
EN 1005-1, Safety of machinery - Human physical performance - Part 1: Terms and definitions.
EN 1005-2, Safety of machinery - Human physical performance - Part 2: Manual handling of machinery and
component parts of machinery.
EN 1005-3, Safety of machinery - Human physical performance - Part 3: Recommended force limits for machinery
operation.
EN 1070:1998, Safety of machinery – Terminology.
EN 1088:1995, Safety of machinery - Interlocking devices associated with guards - Principles for design and
selection.
EN 1672-2:1997, Food processing machinery - Basic concepts - Part 2: Hygiene requirements.
EN 60204-1:1997, Safety of machinery - Electrical equipment of machines - Part 1: General requirements (IEC
60204-1:1997).
EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989).
EN 61000-6-1, Electromagnetic compatibility (EMC) - Part 6-1: Generic standards; Immunity for residential,
commercial and light-industrial environments (IEC 61000-6-1:1997, modified).
EN 61000-6-2, Electromagnetic compatibility (EMC) - Part 6-2: Generic standards; Immunity for industrial
environments (IEC 61000-6-2:1999, modified).
EN 61000-6-3, Electromagnetic compatibility (EMC) - Part 6-3: Generic standards; Emission standard for
residential, commercial and light-industrial environments (IEC 61000-6-3:1996, modified).
EN 61000-6-4, Electromagnetic compatibility (EMC) - Part 6-4: Generic standards; Emission standard for industrial
environments (IEC 61000-6-4:1997, modified).
EN ISO 3744, Acoustics - Determination of sound power levels of noise sources using sound pressure -
Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994).
EN ISO 4871, Acoustics - Declaration and verification of noise emission values of machinery and equipment - (ISO
4871:1996).
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EN 12267:2003 (E)
EN ISO 11204, 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 (EN ISO
11204:1995).
EN ISO 11688-1, Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part
1: Planning (ISO/TR 11688-1:1995).
3 Terms and definitions
For the purposes of this European Standard the terms and definitions given in EN 1070:1998 and the following
apply (see Figures 1 and 2).
3.1
movable protective hood
movable device for covering the saw blade at the cutting zone and on the discharge side above the feed level
3.2
product pusher
movable device for pushing the bone against the cutting zone and for covering the saw blade above the table
3.3
saw blade
toothed cutting tool in the form of a disc
3.4
protective hood
device for covering the saw blade above and below the table except for the cutting zone
3.5
cutting line
device for automatic product processing with conveyor belts or roller conveyors
3.6
feed table
surface with an integrated saw blade for placing the bone in position for cutting
4 List of hazards
4.1 General
This clause and annex C (normative) contain the hazards and hazardous situations based upon EN 1050:1996 as
far as they are dealt with in this European Standard, identified by a risk assessment significant for circular saw
cutting machines, and actions to eliminate or reduce risk.
Before using this standard it is important to carry out a risk assessment of the cutting machine to check that it has
the hazards identified in this clause.
4.2 Mechanical hazards
4.2.1 Circular saw machine with feed table and fixed product pusher (see Figure 3)
4.2.1.1 Area of saw blade
Zone 1
Saw blade at the cutting zone, above the feed table
Hazard of cutting or severing fingers.
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EN 12267:2003 (E)
Zone 2
Saw blade outside the cutting zone, above the feed table
Hazard of cutting or severing fingers.
Zone 3
Saw blade outside the cutting zone, below the feed table
Hazard of cutting or severing fingers.
4.2.1.2 Area of drive mechanism
Zone 4
Saw blade drive
Crushing hazard to fingers or hand.
4.2.2 Circular saw machine in cutting line (see Figure 4) - Area of saw blade
Zone 1
Saw blade at the cutting zone, above the feed plane
Hazard of cutting or severing fingers.
Zone 2
Saw blade outside the cutting zone, above the feed plane
Hazard of cutting or severing fingers
Zone 3
Saw blade outside the cutting zone, below the feed plane
Hazard of cutting or severing fingers.
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EN 12267:2003 (E)
Key
1 Zone 1 1 Zone 1
2 Zone 2 2 Zone 2
3 Zone 3 3 Zone 3
4 Zone 4
5 Zone 5
Figure 3 — Floor type circular saw machine Figure 4 — Circular saw machine in cutting line
- danger zones - danger zones
4.3 Electrical hazards
4.3.1 Direct or indirect contact with life parts
Hazard from electrical shock to the body.
4.3.2 Electrical components with insufficient safety level
Hazards arising from malfunction of electrical components.
Hazards from the effect of failure/unexpected stoppage on other elements in a cutting line.
4.4 Hazard from loss of stability
Zone 5
Wheel-mounted circular saw machines (see Figure 3)
Impact or squeezing hazard to the body if machine topples over.
4.5 Noise hazard
Noise can lead to
permanent loss of hearing,
ringing in the ears (tinitus),
fatigue, stress etc.
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EN 12267:2003 (E)
4.6 Hazards from non-compliance with ergonomic principles
Unhealthy body posture or excessive physical effort
Inadequate consideration of human hand/arm or foot/leg anatomy during machine design
Hazard of injury to the body
4.7 Hazards from non-compliance with hygiene principles
Microbial causes
Spoilage of meat product
Damage to health of the consumer through food poisoning
Infection of the operator
Chemical causes
Contamination of foodstuff through residues of cleaning and disinfecting agents causing harm to consumer
Physical causes
Entrapped items originating from raw materials, machine parts or other sources causing harm to consumer
5 Safety requirements and/or measures
5.1 General
Circular saws for meat and bone shall comply with the safety requirements and/or protective measures of this
clause and annex C. In addition, they shall be designed according to the principles of EN 292 for hazards relevant
but not significant, which are not dealt with by this document (e.g. sharp edges).
NOTE For hazards which are to be reduced by the application of another standard such as EN 294, EN 953, EN 1672-2,
and EN 60204-1, the manufacturer should carry out a risk assessment to establish the requirements of that
standard which are to be applied. This specific risk assessment is part of the general risk assessment of the saw.
Where the means of reducing the risk is by the physical arrangement or positioning of the installed circular saw the
manufacturer shall include in the Information for use a reference to the reduction means to be provided, and to any
limiting value of the requirement, and, if appropriate, to the means of verification.
Where the means of reducing the risk is by a safe system of working the saw, the manufacturer shall include in the
information for use details of the system and of the elements of training required by the operating personnel.
5.2 Mechanical hazards
5.2.1 Circular saw machines with feed table and fixed product pusher
5.2.1.1 Protection of saw blade
Zone 1
Access to the cutting zone on the saw blade shall be prevented. This can be achieved e.g. by the following
measures:
A movable product pusher with a handle shall be permanently fixed to the protective hood of the saw blade. The
product pusher shall be designed so that it automatically falls back into its protective position by its own dead
weight. It shall not be possible for the pusher to make contact with the cutting-edge of the saw blade.
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EN 12267:2003 (E)
The distance „A1“ between product pusher in protective position and feed table shall be < 6 mm (see Figure 5).
Zone 2
Access to the teeth of the saw blade outside of the cutting zone and above the feed table shall be prevented. This
can be achieved e.g. by the following measures:
Except for the cutting zone of the saw blade, a guard (e.g. a fixed protective hood) shall be provided above the
feed table (see Figure 5). It shall be possible to replace the saw blade without removal of the protective hood and
the product pusher.
If the protective hood with the product pusher is removable it shall be interlocked.
The interlocking system of the protective hood shall conform to the requirements described in 5.2.1.2.
After actuation of the interlocking switch of the protective hood the blade should come to a standstill as soon as is
possible, but the time taken shall not exceed 4 s.

Key
1 Automatically falls back by its own weight 1 Fixed protection
2 Protective hood fixed or interlocked 2 Closed machines casing
Figure 5 — Material pusher/protective hood Figure 6 — Protection bar
Zone 3
Access to the saw blade below the feed table shall be prevented. This can be achieved e.g. by the following
measures:
A fixed protection bar or a closed machine casing shall be provided on the circumference of the saw blade (see
Figure 6). The feed table may be foldable and interlocked. The chip pan or a chip removal flap shall be interlocked
on machines without protection bar. The saw blade shall come to a standstill within 4 s after actuation of the
interlocking switches.
For requirements relating to the interlocking system of the feed table, chip pan and chip removal flap, see 5.2.1.2.
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EN 12267:2003 (E)
5.2.1.2 Interlocking devices
The interlocking system shall comply with 4.2.1 of EN 1088:1995, and the safety-related components of the control
system shall comply with 6.2.2, category 1 of EN 954-1:1996.
The interlocking device shall be built inside of the machine housing in order to
fulfil hygienic requirements,
protect against mechanical damages,
protect against the effects of cleaning and disinfection materials,
protect against the effects of cleaning fluids (water),
protect against defeating by simple methods,
and comply with 5.7 of EN 1088:1995.
In the instruction handbook, the manufacturer shall indicate the need for regular verification of the interlocking
devices, and for the user to determine the frequency of verification depending upon the usage of the machine.
5.2.2 Circular saw machine in cutting line
Zones 1 and 2
Access to the saw blade at the cutting zone and discharge side above the feed plane (transport device) shall be
prevented. This can be achieved e.g. by the following measures:
A guard (e.g. a protective hood) shall be provided on the feed and discharge side above the feed plane (transport
device). When lifted, the protective hood may expose the cutting zone as well as the product discharge zone and
shall automatically revert to its protective position by its own dead weight (see Figure 7).
If the protective hood is removable, it shall be interlocked. The saw blade shall come to a standstill within 4 s after
actuation of the interlocking switch of the protective hood.
For requirements relating to the interlocking system of the removable protective hoods, see 5.2.1.2.
Key
1 Automatically falls back by its dead weight 1 Closed machine casing
Figure 7 — Protective hoods Figure 8 — Machine casing
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EN 12267:2003 (E)
Zone 3
Access to the saw blade below the feed plane (transport device) shall be prevented. This can be achieved e.g. by
the following measures:
A system of guards (for example a closed machine casing) with a chip pan shall be provided. The chip pan shall be
interlocked. The saw blade shall come to a standstill within 4 s after actuation of the interlocking switch of the chip
pan (see Figure 1).
For requirements relating to the interlocking system of the chip pan, see 5.2.1.2.
5.2.3 Drive system
Zone 4
Access to the danger points on the drive system shall be prevented. This can be achieved e.g. by the following
measures:
Guards (e.g. doors) in accordance with 3.2 of EN 953:1997 shall be provided on the drive mechanism, which may
be fixed or interlocked.
If guards are removable e.g. for changing the operating process or for cleaning purposes, they shall be interlocked.
For requirements relating to the interlocking system of guards, see 5.2.1.2
5.3 Electrical hazards
5.3.1 General
The electrical equipment shall comply with EN 60204-1 with the following qualifications.
5.3.1 Stopping function of switching devices
The stopping function of switching devices shall be in accordance with 9.2.2, category 0 of EN 60204-1:1997.
Circular saw machines intended for use in a cutting line shall be provided with a means to visually or audibly warn
of it ceasing to function under the operation of a safety device, or, shall be fitted with a means capable of
interrupting the electrical supply to other elements in the cutting line. Details shall be included in the Information for
use.
5.3.2 Emergency stop-device
The OFF switch shall be easily reachable from the operator position.
NOTE An emergency stop device need not be installed for circular saws conforming to this standard.
5.3.3 Protection against water ingress
5.3.3.1 IP degrees of protection
Electrical operating components shall comply with the following degrees of protection in accordance with
EN 60529:
IP X5 External electrical operating components
on the machine,
on the control box on the machine,
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EN 12267:2003 (E)
on the control box located in the process room.
IP X3 Internal electrical operating components
in the machine with enclosed housing with the degree of protection IP X5 and open lower surface.
Protection against direct and indirect impact of a water jet shall be assured.
IP X2 Internal electrical operating components
in a machine with completely enclosed housing with the degree of protection IP X5. Protection against
condensate water shall be provided.
in the control box enclosure.
IP X0 Internal electrical operating components
in a machine with completely enclosed housing with the degree of protection IP X5. Protection against
condensate water shall be provided, and the safety of fingers and the back of hand be assured.
5.3.3.2 Hoods
Ingress of water into the external electrical operating components shall be prevented. This can be achieved e.g. by
the following measures:
the electrical operating components shall be covered by hoods, and,
a statement shall be included in the instruction handbook.
NOTE It is not intended that circular saw machines are cleaned with pressurized water. However, it is difficult to guarantee that
this method will never be used in practice, and the requirements in this clause are included to reduce electrical risks.
Hoods covering the external operating components may be lifted for actuating ON and OFF switches. Hoods shall
not, when closed, restrict the use of the OFF switch (see Figure 9). When using membrane switches or similar
systems, no hoods are needed if the membrane switch or similar systems are suitable for cleaning with pressurized
water.
Key
1 OFF
2 ON
3 Protection hood (OFF)
Figure 9 — ON /- and OFF switch with hood
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EN 12267:2003 (E)
5.3.4 ON and OFF-switch
On circular saw machines, ON and OFF-switches shall be provided. The switches should be arranged on the
operator side of machines (see Figure 1). The ON-switch shall be protected against unintentional switch-on (e.g. by
protective collar).
5.3.5 Electromagnetic compatibility test (see 4.4.1 of EN 60204-1:1997)
If electrical/electronic components are used, the manufacturer shall ensure that the equipment does not produce
any electromagnetic disturbances above the levels specified in EN 61000-6-3 or EN 61000-6-4 as selected by the
manufacturer to be appropriate for the intended place of use. Moreover, it shall also have sufficient immunity to
electromagnetic disturbances to enable it to operate safely as intended and shall not fail to danger when exposed
to the levels and types of disturbance as specified in EN 61000-6-1 or EN 61000-6-2.
This requirement can be deemed to have been met if the manufacturer selects and uses only components that
have been marked as conforming to the EMC Directive and shall apply them in accordance to the supplie
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