Machines for mechanical processing of minerals and similar solid materials - Safety - Part 3: Specific requirements for crushing and milling machinery

This part of prEN 1009 to be used together with prEN 1009-1, specifies the safety requirements and their verification for the design and construction of crushing and milling machinery for the mechanical processing in quarrying, recycling and processing mineral and by-products. In addition, it specifies the type of information on safe working practices (including residual risks) to be provided by the manufacturer.
When requirements of this part of prEN 1009 are different from those which are stated in prEN 1009-1, the requirements of this part of prEN 1009 take precedence over the requirements of prEN 1009-1 for machines that have been designed and built according to the provisions of this part of prEN 1009.
This part of prEN 1009, together with prEN 1009-1, deals with all the significant hazards, hazardous situations and events relevant to crushing and milling machinery when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4).
NOTE 1   EN 13309 specifies test methods and acceptance criteria for evaluating the electromagnetic compatibility of all kind of mobile construction machinery.
NOTE 2   Specific requirements related to road traffic regulations (e.g. lighting, dimensions, speed limit plate) are not taken into account in this standard.
This part of prEN 1009 is not applicable to crushing and milling machinery which are manufactured before the date of publication of this document by CEN.

Maschinen für die mechanische Aufbereitung von Mineralien und ähnlichen festen Stoffen - Sicherheit - Teil 3: Spezifische Anforderungen für Brecher und Mühlen

Dieser Teil der prEN 1009, der zusammen mit prEN 1009-1 anzuwenden ist, legt die Sicherheitsanforderungen und ihre Überprüfung für die Auslegung und Konstruktion von Brechern und Mühlen zur mechanischen Aufbereitung im Sinne von Abbau, Recycling und Aufbereitung von Mineralien und Nebenprodukten fest. Zusätzlich legt er fest, welche Informationen zu sicheren Arbeitspraktiken (einschließlich Restgefahren) vom Hersteller zur Verfügung zu stellen sind.
Wenn Anforderungen dieses Teils der prEN 1009 von in prEN 1009-1 beschriebenen abweichen, haben die Anforderungen dieses Teils der prEN 1009 für Maschinen, die nach den Anforderungen dieses Teils der prEN 1009 ausgelegt und konstruiert wurden, Vorrang vor den Anforderungen von prEN 1009-1.
Dieser Teil der prEN 1009 befasst sich zusammen mit prEN 1009-1 mit allen signifikanten Gefährdungen, Gefährdungssituationen und -ereignissen, die für Brecher und Mühlen gelten, wenn sie bestimmungsgemäß und unter den vom Hersteller vorhersehbaren Bedingungen verwendet werden (siehe Abschnitt 4).
ANMERKUNG 1   EN 13309 legt Prüfverfahren und Abnahmekriterien zur Bewertung der elektromagnetischen Verträglichkeit für alle Arten mobiler Baumaschinen fest.
ANMERKUNG 2   Spezifische Anforderungen im Hinblick auf Straßenverkehrsvorschriften (z. B. Beleuchtung, Abmessungen, Geschwindigkeitsanforderungen, Kennzeichen) werden in dieser Norm nicht berücksichtigt.
Dieser Teil der prEN 1009 gilt nicht für Brecher und Mühlen, die vor dem Datum der Veröffentlichung dieses Dokuments durch CEN hergestellt wurden.

Machines pour le traitement mécanique des minéraux et des matériaux solides similaires - Sécurité - Partie 3 : Prescriptions spécifiques pour machines de concassage et de broyage

La présente partie du prEN 1009, à utiliser conjointement avec le prEN 1009-1, spécifie les exigences de sécurité et leur vérification pour la conception et la construction de machines de concassage et de broyage pour le traitement mécanique pour l'extraction, le recyclage et le traitement des minéraux et sous-produits. En outre, la présente Norme européenne spécifie le type d'informations que le fabricant doit fournir sur les pratiques d'utilisation sûre (incluant les risques résiduels).
Lorsque des exigences de la présente partie du prEN 1009 diffèrent de celles spécifiées dans le prEN 1009-1, les exigences de la présente partie du prEN 1009 prévalent sur les exigences du prEN 1009-1 pour les machines conçues et fabriquées conformément aux dispositions de la présente partie du prEN 1009.
La présente partie du prEN 1009, utilisée conjointement avec le prEN 1009-1, traite de tous les phénomènes dangereux et situations et événements dangereux significatifs inhérents aux machines de concassage et de broyage dans le cadre d'une utilisation normale et des conditions prévues par le constructeur (voir l'Article 4).
NOTE 1   L'EN 13309 spécifie des méthodes d'essai et des critères d'acceptation pour l'évaluation de la compatibilité électromagnétique de tous les types de machines mobiles pour la construction.
NOTE 2   Les exigences spécifiques aux réglementations routières (par exemple, éclairage, dimensions, plaque de limitation de vitesse) ne sont pas prises en compte dans la présente norme.
La présente partie du prEN 1009 ne s'applique pas aux machines de concassage et de broyage qui ont été construites avant la date de publication du présent document par le CEN.

Stroji za mehansko obdelavo mineralov in podobnih trdnih snovi - Varnost - 3. del: Posebne zahteve za stroje za drobljenje in rezkanje

General Information

Status
Published
Public Enquiry End Date
17-Jan-2018
Publication Date
07-Jun-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jun-2020
Due Date
09-Aug-2020
Completion Date
08-Jun-2020

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SLOVENSKI STANDARD
SIST EN 1009-3:2020
01-september-2020

Stroji za mehansko obdelavo mineralov in podobnih trdnih snovi - Varnost - 3. del:

Posebne zahteve za stroje za drobljenje in rezkanje

Machines for mechanical processing of minerals and similar solid materials - Safety -

Part 3: Specific requirements for crushing and milling machinery
Maschinen für die mechanische Aufbereitung von Mineralien und ähnlichen festen
Stoffen - Sicherheit - Teil 3: Spezifische Anforderungen für Brecher und Mühlen

Machines pour le traitement mécanique des minéraux et des matériaux solides similaires

- Sécurité - Partie 3 : Prescriptions spécifiques pour machines de concassage et de

broyage
Ta slovenski standard je istoveten z: EN 1009-3:2020
ICS:
13.110 Varnost strojev Safety of machinery
73.120 Oprema za predelavo rudnin Equipment for processing of
minerals
91.220 Gradbena oprema Construction equipment
SIST EN 1009-3:2020 en,fr,de

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

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SIST EN 1009-3:2020
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SIST EN 1009-3:2020
EN 1009-3
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2020
EUROPÄISCHE NORM
ICS 73.120; 91.220
English Version
Machines for mechanical processing of minerals and
similar solid materials - Safety - Part 3: Specific
requirements for crushing and milling machinery

Machines pour le traitement mécanique des minéraux Maschinen für die mechanische Aufbereitung von

et des matières solides similaires - Sécurité - Partie 3 : Mineralien und ähnlichen festen Stoffen - Sicherheit -

Prescriptions spécifiques pour les machines de Teil 3: Spezifische Anforderungen für Brecher und

concassage et de broyage Mühlen
This European Standard was approved by CEN on 13 April 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1009-3:2020 E

worldwide for CEN national Members.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Safety requirements and/or protective/risk reduction measures ............................................... 7

4.1 General ................................................................................................................................................................ 7

4.2 Jaw crusher ........................................................................................................................................................ 8

4.3 Gyratory and cone crusher ....................................................................................................................... 10

4.4 Horizontal shaft impactor, impact mills, hammer crushers and hammer mills ................... 10

4.5 Roll crushers .................................................................................................................................................. 11

4.6 Rod, ball and autogenous mills ............................................................................................................... 12

4.7 Vertical shaft impactor ............................................................................................................................... 12

4.8 High pressure roller mill ........................................................................................................................... 13

5 Verification of safety requirements and/or protective/risk reduction measures .............. 13

6 Information for use ..................................................................................................................................... 16

6.1 General ............................................................................................................................................................. 16

6.2 Signals and warning devices .................................................................................................................... 16

6.3 Instruction handbook ................................................................................................................................. 16

Annex A (informative) Examples of crushing and milling machinery ................................................... 18

Annex B (informative) Trilingual terminology of crushing and milling machinery ......................... 22

Annex C (informative) List of significant hazards ......................................................................................... 23

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2006/42/EC aimed to be covered .............................................. 30

Bibliography ................................................................................................................................................................. 32

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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
European foreword

This document (EN 1009-3:2020) has been prepared by Technical Committee CEN/TC 151 “Construction

equipment and building material machines — Safety”, the secretariat of which is held by DIN.

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 November 2020, and conflicting national standards shall

be withdrawn at the latest by May 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a standardization request 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.
This part of EN 1009 is intended to be used in conjunction with EN 1009-1:2020.

EN 1009 “Machines for mechanical processing of minerals and similar solid materials — Safety”

comprises the following parts:
— Part 1: Common requirements for machinery and processing plants

— Part 2: Specific requirements for feeding machinery and continuous handling equipment

— Part 3: Specific requirements for crushing and milling machinery
— Part 4: Specific requirements for screening machinery

— Part 5: Specific requirements for cleaning, recycling and mud treatment machinery

— Part 6: Specific requirements for mobile machinery (in preparation)

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, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
Introduction
This document is a type-C standard as stated in EN ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the market

players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events are

covered are indicated in the Scope of this document.

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 the other

standards for machines that have been designed and built according to the requirements of this type-C

standard.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
1 Scope

This document, to be used together with EN 1009-1:2020, specifies the safety requirements and their

verification for the design and construction of crushing and milling machinery for the mechanical

processing in quarrying, recycling and processing mineral and by-products. In addition, it specifies the

type of information on safe working practices (including residual risks) to be provided by the

manufacturer.

When requirements of this part of EN 1009 are different from those which are stated in EN 1009-1:2020,

the requirements of this part of EN 1009 take precedence over the requirements of EN 1009-1:2020 for

machines that have been designed and built according to the provisions of this part of EN 1009.

This document, together with EN 1009-1:2020, deals with all the significant hazards, hazardous

situations and events relevant to crushing and milling machinery when they are used as intended and

under the conditions foreseen by the manufacturer (see Annex C).
This document does not cover:
— design relating to road traffic regulations;

— hazards arising from the use of the machines in potentially explosive atmospheres as well as from

processing of explosive materials and risks related to electromagnetic compatibility;

— specific hazards related to mobile machinery.

NOTE 1 EN ISO 13766-1 and EN ISO 13766-2 specify test methods and acceptance criteria for evaluating the

electromagnetic compatibility of all kinds of mobile construction machinery.

NOTE 2 prEN 1009-6 “Specific requirements for mobile and semi mobile equipment” is under preparation to

cover specific requirements (e.g. mobility, braking, access, frequent transportation), including exceptions and

additional requirements for mobile and semi mobile equipment. This means that mobile machines are not covered

as long as EN 1009-6 is not published by CEN.

This document is not applicable to crushing and milling machinery which are manufactured before the

date of publication of this document by CEN.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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.

EN 795:2012, Personal fall protection equipment — Anchor devices

EN 1009-1:2020, Machines for mechanical processing of minerals and similar solid materials — Safety —

Part 1: Common requirements for machinery and processing plants

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 14122-2:2016, Safety of machinery — Permanent means of access to machinery — Part 2: Working

platforms and walkways (ISO 14122-2:2016)

EN ISO 14122-3:2016, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,

stepladders and guard-rails (ISO 14122-3:2016)
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)

ISO 2631-1:1997, Mechanical vibration and shock — Evaluation of human exposure to whole-body

vibration — Part 1: General requirements
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,

EN 1009-1:2020 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at http://www.electropedia.org/
NOTE Annex A shows examples of crushing and milling machinery.
3.1
crusher

machine intended for reducing the size of mineral-based material to particles of smaller dimension

starting from coarse size to millimetric size and which can be based on various crushing technology

3.2
mill

machine intended for reducing the size of minerals based material to particles of smaller dimensions

starting from middle coarse size to micronic size, and which can be based on various grinding

technologies
3.3
jaw crusher

compression crushing machine consisting of a fixed jaw and a movable jaw which moves so as to increase

and decrease the gap between the two jaws
[SOURCE: ISO 11375:1998, 3.2.1]
3.4
gyratory crusher
cone crusher

compression crushing machine consisting of a moving part rotated eccentrically within the fixed part;

both moving and fixed parts are in a form of truncated cones
[SOURCE: ISO 11375:1998, 3.2.2]
3.5
roll crusher
crushing machine which breaks

a) by pressure being continuously maintained between the faces of two revolving cylinders (rolls);

b) by impact, shear and pressure between one roll which has, at intervals rows of teeth and another roll

or breaker plate
[SOURCE: ISO 11375:1998, 3.2.3]
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
3.6
hammer mill

crushing and milling machine equipped by articulated hammers based on a rotary axis installed inside a

fix frame
3.7
rod mill
ball mill
autogenous mill

cylinder, rotating on a horizontal axis that can be partly filled with balls or rods (generally of steel), or

nothing if full autogenous milling, that, by their tumbling motion, reduce a coarse material into a fine

material by impact and abrasion
Note 1 to entry: These technologies can be used in wet or dry process.
3.8
horizontal shaft impactor
horizontal impact crusher

crusher (3.1) consisting of a rotor on a horizontal shaft equipped with blow bars which is rotated at high

speed, throwing material against the impact aprons

Note 1 to entry: The crusher housing is designed to open the housing hydraulically.

3.9
vertical shaft impactor
vertical impact crusher

crusher (3.1) consisting of a rotor or impeller disc mounted on a vertical shaft which is rotated at high

speed, throwing materials against the anvils or previously crushed particles lining the crushing chamber

or another part of fed material which bypasses the rotor
[SOURCE: ISO 11375:1998, 3.2.4.3]
3.10
high-pressure grinding roll

machine designed with two rollers working under high pressure for fine comminution of the material

Note 1 to entry: The particles of the feed material are in the majority smaller than the gap between the roller.

3.11
stirred mill

machine with a vertical drum equipped with a mixer and full of grinding media dedicated to low grain

size grinding
4 Safety requirements and/or protective/risk reduction measures
4.1 General
4.1.1 General requirements

Crushing and milling machinery shall comply with the requirements of EN 1009-1:2020, as far as not

modified or replaced by the requirements of this part.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
4.1.2 Maintenance

A safe means of access (e.g. permanent or temporary working platform) around the crusher is required

to handle and remove the wear parts.

This access platform shall meet requirements of 4.1.3 to be used for process monitoring.

The minimum operating loads of temporary working platform shall be 1,5 kN/m under distributed load

for the structure.

In case of adjustable temporary working platform fitted with a locking mechanism, it shall hold twice the

minimum operating loads of temporary working platform.

If there is a risk of falling during maintenance operation, anchorage points shall be provided in

accordance with tests of EN 795:2012.

For maintenance work in the crushing chamber, isolation and energy dissipation shall be provided for

the crusher as well as for upstream and downstream sub-assemblies. See EN 1009-1:2020, 4.10.1.

4.1.3 Process monitoring

When a clear view to crusher feeding area is required according to the instruction handbook of the

manufacturer to ensure effective process, the following safety aspects need to be considered:

— if a permanent access platform is fitted, the inspection area shall comply with EN ISO 14122-2:2016

and be guarded to protect the operator from ejection of rocks and contact with the feeding area of

the machine as well as falling hazards;
The permanent access platform may be same as the maintenance platform.

— remote monitoring such as CCTV system or an automatic material control system (e.g. level sensing

and control) shall be provided when the feeding area is out of vision of the operator.

Means shall be provided to control the material feeding in order to stop the upstream material flow in

case of a blockage (e.g. current control, speed control, level control). Purpose of this is to reduce

overfilling and falling objects occurrences and to identify blockages in order to reduce necessity for

interventions for clearing out machines. Appropriate instructions shall be included in the instruction

handbook, see 6.3.

NOTE The control of the material feeding function is a process function, not a safety function.

4.1.4 Wear parts handling

Mounting and dismounting of new and/or used wear parts shall be in accordance with EN 1009-1:2020,

4.17.

NOTE The specific lifting accessories can be designed-in and/or implemented to the machine as a separate

element (e.g. eyelet, specific tool or any device to facilitate handling).
4.2 Jaw crusher

4.2.1 Coil spring tensioned tension rods of jaw crushers shall be guarded according to EN 1009-1:2020,

4.11, in such a way that the parts of the rods are retained in the event of break up.

4.2.2 When the crusher is in operation, means shall be provided for hands and feet to be prevented

from touching the tension springs.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)

4.2.3 The design of the machine shall take in account the need for safe exchange of the toggle plate(s),

jaw dies and cheek plates according to EN 1009-1:2020, 4.17.5 and appropriate instructions shall be

included in the instruction handbook.

4.2.4 Where it is intended that the operator enter inside the crushing chamber, a means shall be

designed or provided in order to:

— allow access in comfortable conditions with access openings complying with EN 1009-1:2020, 4.2.2;

— prevent operator from falling; and

— ensure that jaw crusher liners cannot accidentally fall during maintenance work.

Where special equipment or accessories are required (e.g. additional temporary working platform), they

shall be provided by the manufacturer.

If part of the machinery can be used as a safe working platform, there is no need for providing special

equipment or accessories.
If a temporary working platform is provided, it shall be designed to:

— take into account presumable crushing chamber geometry changes (e.g. available liner options,

crusher setting adjustment and the amount of wear);

— in case of adjustable platform, ensure that the locking mechanism will hold required forces of 4.1.2;

— enable safe use of ladders (when required);

NOTE If jaw liners are constructed from two pieces it can be necessary to provide two separate platforms.

If the crushing chamber and the feed hopper by design protect the worker from falling, then guardrails

are not required.

The manufacturer of the platform shall provide operating instructions. See 6.3. Special attention shall be

given to:
— residual risks;
— inspection and repair instructions;
— limitations related to crusher types (e.g. crusher models or sizes).

4.2.5 The feed opening of the crusher shall be provided with a guard to minimize hazards caused by

ejected material.

When raised for maintenance, the guard shall be provided with means to prevent it falling down from its

position when opened.

4.2.6 Means shall be foreseen to solve blockages (e.g. hydraulic rock breaker, reverse rotating) and

instructions shall be provided, see 6.3.

4.2.7 If means of access is permanently installed adjacent to crusher inlet and if manufacturer permits

access during operation, then platform shall comply with whole body vibration standard according to

ISO 2631-1:1997. In all other cases, restricted areas shall be defined in the instruction handbook.

NOTE Clearing of blockages is not normal operation. In case of using the means of access only during clearing

blockages while the crusher is running this vibration standard is not applicable. For using the means of access for

maintenance work while the crusher is not running, this vibration standard is also not applicable.

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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
4.3 Gyratory and cone crusher

4.3.1 There shall be a system that prevents the crusher to be over filled with feed material. A typical

solution for this is a level sensor system that will control the feeder.

4.3.2 The design of the sub-assembly shall take in account the need for maintenance work inside the

crushing chamber.

4.3.3 In cone and gyratory crushers, dismantling of upper frame is required in order to change wear

parts. If according to EN ISO 14122-2:2016, the working height is over to 1 700 mm, it is required that

there is a separate working platform that is installed into the crushing chamber during the maintenance

work.

The platform shall prevent the operator from falling into the cavity. In addition, if there is a risk of falling

outside the crusher then it is required that the platform has guardrail as specified in

EN ISO 14122-3:2016, 7.1. The guardrail is not required if the falling height is less than 500 mm.

4.3.4 The design of the sub-assembly shall take in account the need of safe installation and exchange of

the main parts of the machine.

4.3.5 When a cone crusher is fitted with coil springs as a tramp release mechanism and threads for

setting adjustment, means shall be provided for hands and feet to be prevented from touching these

devices.

4.3.6 If supplying a sub-assembly, protection against rocks ejection shall be designed and supplied as

part of the modular machinery.

4.3.7 If the crusher is stalled during crushing there is a risk of serious injury if a compressed rock or

uncrushable material ejects from the cavity during the inspection. The crusher shall be designed to allow

release of the compression forces. Detailed instructions how to clear stalled crusher with warnings shall

be provided in the instruction handbook (see 6.3).
4.4 Horizontal shaft impactor, impact mills, hammer crushers and hammer mills
4.4.1 Machine under rotation

Means shall be fitted, e.g. chain and rubber curtains in the inlet and outlet of the crusher or the crusher

shall be closed and incorporated in order to minimize the risk of ejection of material.

Opening of the crusher or reaching the rotor via intended means of access (housing and or inspection

door), including in the event of a blockage, shall only be possible if the rotor is locked. Appropriate

instructions shall be included in the instruction handbook, see 6.3.

When an impact crusher is fitted with coil springs as a tramp release mechanism, means shall be provided

for hands and feet to be prevented from touching these devices. In case the impact crusher is equipped

with an overload protection system, it shall be ensured that injury of people by moving parts is minimized

by proper design and the sub-assembly shall include a maintenance area for the operators.

A visual inspection opening shall be provided for inspection inside the crusher. The crusher housing as

well as any visual inspection opening or guards giving access to the rotor shall be fitted with interlocking

guard with guard locking (see EN 1009-1:2020, 4.11.4).

Backside and/or top of housing inspection doors shall be considered as fixed guards, provided that the

rotor shall still be covered by impact aprons.
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SIST EN 1009-3:2020
EN 1009-3:2020 (E)
4.4.2 Maintenance/inspection

The rotor of the crusher shall be lockable in any position, including in the event of a blockage, and

protected against unexpected turning (e.g. gravity movement). Appropriate instructions shall be included

in the instruction handbook, see 6.3.
NOTE 1 Locking the rotor with a pin only in a few positions is not safe.

In addition, if turning of the rotor is necessary for the maintenance (e.g. changing of wear parts, removal

of blockages), the rotor shall be designed to be turned in a visible controlled manner from outside a

danger zone.

For maintenance, a device (e.g. mechanical, hydraulic) shall be fitted in order to adjust the position of the

rotor without manual intervention by the operator directly on the rotor and appropriate instructions

shall be included in the instruction handbook, see 6.3.

During maintenance, upon releasing the control function, the rotor of the machine shall be designed to

stop in a maximum of 3 s. For manual mechanical drive solutions, this stop time also applies as a

requirement, not as a safety function.
NOTE 2 EN ISO 13855 provides guidance for speed of approach.

The design of the machine shall consider appropriate measures to prevent accidental closure of the

housing when opened for maintenance (e.g. position stable by design, mechanical/hydraulic restraint

devices).

Design of the machine shall include the possibility to exchange wear parts in safe conditions (e.g.

providing handling mechanism, tools, means of access and space for human passage).

The sub-assembly shall be fitted with means of access to the various setting devices.

During maintenance, the maximum rotor peripheral speed shall be 100 mm/s and the performance level

required shall be as specified in EN 1009-1:2020, Table 2.For manual mechanical drive solutions, this

speed also applies as a requirement, not as a safety function.
4.5 Roll crushers
4.5.1 Machine under rotation

In case double roll crushers are equipped with an overload protection system, a guard complying with

EN 1009-1:2020, 4.11 shall be installed in the area where the roller and connected equipment can move

in reaction to an overload. For remaining hazards, appropriate warning signs shall be provided, and

corresponding instruction shall be provided in the information for use, see 6.3.

The design of the machine shall consider the need for access in view of the safe cleaning of the roll scraper

devices and re-adjustment of the scraper lips.

Means shall be fitted, e.g. chain and rubber curtains in the inlet and outlet of the crusher or the crusher

shall be closed and incorporated in order to minimize the risk of ejection of material.

No access to the rolls shall be possible until the rolls have stopped rotating. The rolls of the crusher shall

be lockable in any position.

Opening of the crusher, including in the event of a blockage, shall only be possible if the rolls are locked.

This applies to the use of devices, which are provided to open the crusher housing, e.g.

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