SIST EN 848-1:2007
(Main)Safety of woodworking machines - One side moulding machines with rotating tool - Part 1: Single spindle vertical moulding machines
Safety of woodworking machines - One side moulding machines with rotating tool - Part 1: Single spindle vertical moulding machines
This document deals with the significant hazards, hazardous situations and events as listed in Clause 4 which are relevant to stationary and displaceable hand fed single spindle vertical moulding machines (with or without demountable power feed unit), herein after referred to as "machines", designed to cut solid wood, chip board, fibreboard, plywood and also these materials if they are covered with plastic laminate or edgings when they are used as intended and under the conditions foreseen by the manufacturer.
NOTE 1 For the definition of stationary and displaceable machine see 3.1.17 and 3.1.18.
This document does not apply to:
a) machines equipped with outboard bearings;
b) machines equipped with powered movements of front extension table and/or tenoning travelling table;
c) hand held woodworking machines or any adaptation permitting their use in a different mode, i.e. bench mounting;
NOTE 2 Hand-held motor-operated electric tools are dealt with in EN 60745-1 together with EN 60745-2-17.
d) machines set up on a bench or a table similar to a bench, which are intended to carry out work in a stationary position, capable of being lifted by one person by hand. The bench can also be an integrated part of the machine if it consists of hinged legs which can be extended down;
NOTE 3 Transportable motor-operated electric tools are dealt with in EN 61029-1 together with
EN 61029-2-8.
This document is not applicable to hand fed single spindle vertical moulding machines which are manufactured before the date of its publication as EN.
NOTE 4 Machines covered by this document are listed under A.7 of Annex IV of the Machinery Directive.
Sicherheit von Holzbearbeitungsmaschinen - Fräsmaschinen für einseitige Bearbeitung mit drehendem Werkzeug - Teil 1: Einspindelige senkrechte Tischfräsmaschinen
Dieses Dokument behandelt die im Abschnitt 4 aufgeführten signifikanten Gefährdungen, Gefährdungs¬situationen und Gefährdungsereignisse, die auf stationäre und verschiebbare einspindelige senkrechte Tischfräsmaschinen (mit oder ohne abnehmbaren Vorschubapparat) zutreffen im Folgenden als Maschinen bezeichnet , die konstruiert sind zum Bearbeiten von Massivholz, Spanplatten, Faserplatten, Sperrholz, sowie diesen Werkstoffen, wenn sie kunststoffbeschichtet oder mit Kunststoffkanten versehen sind, wenn sie bestimmungsgemäß und entsprechend den vorhersehbaren Bedingungen des Herstellers verwendet werden.
ANMERKUNG 1 Hinsichtlich der Definition von stationärer und verschiebbarer Maschine siehe 3.2.17 und 3.2.18.
Dieses Dokument gilt nicht für:
a) Maschinen, die mit Oberlager ausgerüstet sind;
b) Maschinen, die mit kraftbetätigten Bewegungen einer vorderen Tischverbreiterung und/oder eines Zapfenschneid-/Schlitztisches ausgerüstet sind;
c) handgeführte Holzbearbeitungsmaschinen einschließlich solcher Einrichtungen, die ihre Verwendung in einer anderen Weise z. B. in einer Stationäreinrichtung ermöglichen;
ANMERKUNG 2 Handgeführte motorbetriebene Elektrowerkzeuge sind in EN 60745-1:2003 zusammen mit EN 60745 2 17:2003 behandelt.
d) Maschinen, die auf ein Gestell oder auf einen Tisch, der einem Gestell ähnlich ist, aufgesetzt sind und die vorgesehen sind, während des Betriebs stationär verwendet zu werden und die von einer Person von Hand angehoben werden können. Das Gestell kann auch ein fester Bestandteil der Maschine sein, wenn es aus scharnierbefestigten Füßen besteht, die heruntergeklappt werden können.
ANMERKUNG 3 Transportable motorbetriebene Elektrowerkzeuge sind in EN 61029-1:2000 zusammen mit prEN 61029 2-8 :2003 behandelt.
Dieses Dokument gilt nicht für einspindelige senkrechte Tischfräsmaschinen mit Handvorschub, die vor seiner Veröffentlichung als EN hergestellt wurden.
Sécurité des machines pour le travail du bois - Machines a fraiser sur une face, a outil rotatif - Partie 1: Toupie monobroche a broche verticale
Le présent document traite des phénomenes dangereux, des situations et événements dangereux significatifs, tels qu’énumérés a l'Article 4, applicables aux toupies fixe et déplaçable monobroche a axe vertical a avance manuelle, avec ou sans unité d'alimentation mécanisée escamotable, ci-apres désignées comme « machines ». Celles-ci sont conçues pour la coupe de bois massif, de panneaux de particules, de contre-plaqué, ainsi que ces matériaux si leurs surfaces ou leurs chants sont recouverts de matiere plastique ou de plastique léger stratifié, durant l’utilisation normale et dans les conditions prévues par le fabricant.
NOTE 1 Pour la définition de machine fixe et machine transportable, voir 3.2.17 et 3.2.18.
La présente Norme européenne ne s’applique pas :
a) aux machines équipées de contre-paliers extérieurs ;
b) aux machines équipées de mouvements mécanisés d’allonge de table frontale et/ou du chariot de tenonnage ;
c) aux machines pour le travail du bois portatives ou toute adaptation permettant leur utilisation de maniere différente, c'est-a-dire fixées sur un bâti ;
NOTE 2 Les outils électroportatifs a moteur sont traités dans l’EN 60745-1:2003 a utiliser conjointement avec
l’EN 60745-2-17:2003.
d) aux machines montées sur un bâti, ou une table similaire a un bâti, conçues pour réaliser un travail a poste fixe et capables d'etre soulevées a la main par une personne. Le bâti peut également etre une partie intégrée a la machine s'il consiste en pieds articulés qui peuvent etre dépliés.
NOTE 3 Les machines-outils semi-fixes électriques sont traitées dans l’EN 61029-1:2000 a utiliser conjointement avec le prEN 61029-2-8:2002.
La présente Norme européenne ne s’applique pas aux toupies monobroche a axe vertical qui ont été fabriquées avant sa date de publication comme EN.
NOTE 4 Les machines concernées par le présent document sont listées dans l’Annexe IV, A.7, de la Directive « Machines ».
Varnost lesnoobdelovalnih strojev - Rezkalniki z vrtilnim orodjem za enostransko obdelavo - 1. del: Enovretenski navpični rezkalni stroji
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 848-1:2007
01-maj-2007
1DGRPHãþD
SIST EN 848-1:2000
SIST EN 848-1:2000/A1:2000
9DUQRVWOHVQRREGHORYDOQLKVWURMHY5H]NDOQLNL]YUWLOQLPRURGMHP]DHQRVWUDQVNR
REGHODYRGHO (QRYUHWHQVNLQDYSLþQLUH]NDOQLVWURML
Safety of woodworking machines - One side moulding machines with rotating tool - Part
1: Single spindle vertical moulding machines
Sicherheit von Holzbearbeitungsmaschinen - Fräsmaschinen für einseitige Bearbeitung
mit drehendem Werkzeug - Teil 1: Einspindelige senkrechte Tischfräsmaschinen
Sécurité des machines pour le travail du bois - Machines a fraiser sur une face, a outil
rotatif - Partie 1: Toupie monobroche a broche verticale
Ta slovenski standard je istoveten z: EN 848-1:2007
ICS:
79.120.10 Lesnoobdelovalni stroji Woodworking machines
SIST EN 848-1:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 848-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2007
ICS 79.120.10 Supersedes EN 848-1:1998
English Version
Safety of woodworking machines - One side moulding machines
with rotating tool - Part 1: Single spindle vertical moulding
machines
Sécurité des machines pour le travail du bois - Machines à Sicherheit von Holzbearbeitungsmaschinen -
fraiser sur une face, à outil rotatif - Partie 1: Toupie Fräsmaschinen für einseitige Bearbeitung mit drehendem
monobroche à arbre verticale Werkzeug - Teil 1: Einspindelige senkrechte
Tischfräsmaschinen
This European Standard was approved by CEN on 13 January 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 848-1:2007: E
worldwide for CEN national Members.
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EN 848-1:2007 (E)
Contents Page
Foreword.4
Introduction .5
1 Scope.6
2 Normative references.6
3 Terms and definitions .9
3.1 General.9
3.2 Definitions.9
3.3 Terminology.14
4 List of significant hazards .17
5 Safety requirements and/or measures .20
5.1 General.20
5.2 Controls.20
5.2.1 Safety and reliability of control systems.20
5.2.2 Position of controls .21
5.2.3 Starting.23
5.2.4 Normal stopping.23
5.2.5 Emergency stop.24
5.2.6 Mode selection.24
5.2.7 Speed changing.25
5.2.8 Adjustments control.26
5.2.9 Failure of the power supply.27
5.2.10 Failure of the control circuits .27
5.3 Protection against mechanical hazards .28
5.3.1 Stability.28
5.3.2 Hazard of break-up during operation.28
5.3.3 Tool holder and tool design.28
5.3.4 Braking.34
5.3.5 Devices to minimise the possibility or the effect of kickback .35
5.3.6 Work-piece supports and guides.38
5.3.7 Prevention of access to moving parts.44
5.3.8 Workpiece clamping device.49
5.3.9 Safety appliances.49
5.4 Protection against non-mechanical hazards .50
5.4.1 Fire.50
5.4.2 Noise.50
5.4.3 Emission of chips and dust.51
5.4.4 Electricity.52
5.4.5 Ergonomics and handling.52
5.4.6 Pneumatics.53
5.4.7 Hydraulics.53
5.4.8 Electromagnetic compatibility.53
5.4.9 Errors of fitting.53
5.4.10 Supply disconnecting devices .53
5.4.11 Maintenance.54
6 Information for use .54
6.1 Warning devices.54
6.2 Marking.54
6.3 Instruction handbook.57
2
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EN 848-1:2007 (E)
Annex A (normative) Determination of maximum tool spindle speeds .61
A.1 Determination of spindle speed.61
Annex B (normative) Rigidity test for pressure pads, hand protectors and guiding steadies.66
B.1 Pressure pads.66
B.1.1 Fence pressure pads.66
B.1.2 Table pressure pads.68
B.1.3 Measuring equipment.69
B.1.4 Test and test requirements.69
B.1.5 Measuring conditions.69
B.2 Adjustable guard (Hand protector) and guiding steady.69
B.2.1 Adjustable guard.69
B.2.2 Guiding steady.70
B.2.3 Measuring equipment.72
B.2.4 Test.72
B.2.5 Measuring conditions.72
Annex C (normative) Stability test for displaceable machines .73
Annex D (informative) Use of well tried components.74
Annex E (normative) Brake tests .75
E.1 Conditions for all tests.75
E.2 Tests.75
E.2.1 Un-braked run-down time.75
E.2.2 Run-up time.75
E.2.3 Braked run-down time.75
Annex F (normative) Use of electronic components .77
F.1 General.77
F.2 SRECS.77
F.2.1 Components, hardware.77
F.2.2 Safety related software.78
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of UE Directive 98/37/EC.80
Bibliography.83
3
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EN 848-1:2007 (E)
Foreword
This document (EN 848-1:2007) has been prepared by Technical Committee CEN/TC 142 “Woodworking
machines - Safety”, the secretariat of which is held by UNI.
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 August 2007, and conflicting national standards shall be withdrawn at
the latest by August 2007.
This document supersedes EN 848-1:1998.
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 the Machinery Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
Organisation contributing to the preparation of this document include the European Association of
Manufacturer of Woodworking Machines "EUMABOIS".
The European Standards produced by CEN/TC 142 are particular to woodworking machines and compliment
the relevant A and B standards on the subject of general safety (see introduction of EN ISO 12100-1:2003 for
a description of A, B and C standards).
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
4
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EN 848-1:2007 (E)
Introduction
This document has been prepared to be a harmonised standard to provide one means of conforming to the
essential safety requirements of the Machinery Directive, and associated EFTA Regulations.
This document is a type C standard as stated in EN 12100-1:2003.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of other standards, for machines that
have been designed and built in accordance with the requirements of the provisions of this type C standard.
The requirements of this document are directed to manufacturers and their authorised representatives of
single spindle vertical moulding machines. It is also useful for designers.
This document also includes provisions and examples of information to be provided by the manufacturer to
the user.
Common requirements for tooling are given in EN 847-1:2005, EN 847-2:2001 and EN 847-3:2004.
5
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EN 848-1:2007 (E)
1 Scope
This document deals with the significant hazards, hazardous situations and events as listed in Clause 4 which
are relevant to stationary and displaceable hand fed single spindle vertical moulding machines (with or without
demountable power feed unit), herein after referred to as "machines", designed to cut solid wood, chip board,
fibreboard, plywood and also these materials if they are covered with plastic laminate or edgings when they
are used as intended and under the conditions foreseen by the manufacturer.
NOTE 1 For the definition of stationary and displaceable machine see 3.2.17 and 3.2.18.
This document does not apply to:
a) machines equipped with outboard bearings;
b) machines equipped with powered movements of front extension table and/or tenoning travelling table;
c) hand held woodworking machines or any adaptation permitting their use in a different mode, i.e. bench
mounting;
NOTE 2 Hand-held motor-operated electric tools are dealt with in EN 60745-1:2003 together with EN 60745-2-17:2003.
d) machines set up on a bench or a table similar to a bench, which are intended to carry out work in a
stationary position, capable of being lifted by one person by hand. The bench can also be an integrated
part of the machine if it consists of hinged legs which can be extended down;
NOTE 3 Transportable motor-operated electric tools are dealt with in EN 61029-1:2000 together with
prEN 61029-2-8:2003.
This document is not applicable to hand fed single spindle vertical moulding machines which are
manufactured before the date of its publication as EN.
NOTE 4 Machines covered by this document are listed under A.7 of Annex IV of the Machinery Directive.
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.
EN 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper
limbs
EN 847-1:2005, Tools for woodworking — Safety requirements — Part 1: Milling tools, circular saw blades
EN 847-2:2001, Tools for woodworking — Safety requirements — Part 2: Requirements for the shank of
shank mounted milling tools
EN 894-1:1997, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 1: General principles for human interactions with displays and control actuators
EN 894-2:1997, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 2: Displays
EN 894-3:2000, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 3: Control actuators
6
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EN 848-1:2007 (E)
EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and components —
Hydraulics
EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and components —
Pneumatics
EN 1005-1:2001, Safety of machinery — Human physical performance — Part 1: Terms and definitions
EN 1005-2:2003, Safety of machinery — Human physical performance — Part 2: Manual handling of
machinery and component parts of machinery
EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits
for machinery operation
EN 1005-4:2005, Safety of machinery — Human physical performance — Part 4: Evaluation of working
postures and movements in relation to machinery
EN 1037:1995, Safety of machinery — Prevention of unexpected start-up
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
EN 1837:1999, Safety of machinery — Integral lighting of machines
EN 50178:1997, Electronic equipment for use in power installations
EN 50370-1:2005, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part
1: Emission
EN 50370-2:2003, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part
2: Immunity
EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:2005, modified)
EN 60439-1:1999, Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially
type-tested assemblies (IEC 60439-1:1999)
EN 60529:1991, Degree of protection provided by enclosure (IP code) (IEC 60529:1989)
EN 61310-1:1995, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
auditory and tactile signals (IEC 61310-1:1995)
EN 61496-1:2004, Safety of machinery — Electro sensitive protective equipment — Part 1: General
requirements and tests (IEC 61496-1:2004, modified)
EN 61508-3:2001, Functional safety of electrical/electronic/programmable electronic safety related systems —
Part 3: Software requirements (IEC 61508-3:1998 + Corrigendum 1999)
EN 62061:2005, Safety of machinery — Functional safety of safety-related electrical, electronic and
programmable control systems (IEC 62061:2005)
EN ISO 3743-1:1995, 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 3743-1:1994)
7
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EN 848-1:2007 (E)
EN ISO 3743-2:1996, Acoustics — Determination of sound power levels of noise sources using sound
pressure — Engineering methods for small, movable sources in reverberant fields — Part 1: Methods for
special reverberation test rooms (ISO 3743-2:1994)
EN ISO 3744:1995, 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 3745:2003, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)
EN ISO 3746:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995)
EN ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment (ISO 4871:1996)
EN ISO 9614-1:1995, Acoustics — Determination of sound power levels of noise sources using sound
intensity — Part 1: Measurement at discreet points (ISO 9614-1:1993)
EN ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement method of
emission sound pressure levels at a work station and at other specified positions — Survey method in situ
(ISO 11202:1995)
EN ISO 11202:1995/AC:1997, Acoustics — Noise emitted by machinery and equipment — Measurement
method of emission sound pressure levels at a work station and at other specified positions — Survey method
in situ (ISO 11202:1995/Cor.1:1997)
EN 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 11204:1995)
EN ISO 11204:1995/AC:1997, 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 11204:1995/Cor.1:1997)
EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 11688-1:1998/AC:1998, Acoustics — Recommended practice for the design of low-noise machinery
and equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles (ISO 12100-2:2003)
EN ISO 13849-1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO 13849-1:2006)
EN ISO 13849-2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
(ISO 13849-2:2003)
EN ISO 13850:2006, Safety of machinery - Emergency stop - Principles for design (ISO 13850:2006)
ISO 7009:1983, Woodworking machines — Single spindle moulding machines — Nomenclature and
acceptance conditions
ISO 7960:1995, Airborne noise emitted by machine tools — Operating conditions for woodworking machines
8
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EN 848-1:2007 (E)
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following
apply.
3.2 Definitions
3.2.1
single spindle vertical moulding machine
hand fed machine fitted with a single vertical spindle (fixed or removable) the position of which is fixed during
machining and a horizontal table, all or part of which are fixed during operation. The spindle passes through
the table and its drive motor is situated beneath the table. The machine may have any of the following
features:
a) the facility for the spindle to be vertically adjustable relative to the table;
b) the facility to tilt the spindle;
c) the facility for fitting an additional manually operated tenoning travelling table;
d) the facility for the glass bead recovery;
e) the facility for an adjustable table insert
3.2.2
straight work
shaping of a work-piece with one face in contact with the table and a second with the fence, and where the
work starts at one end of the work-piece and continues through to the other end (see Figure 1)
Figure 1 — Example of straight work
9
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EN 848-1:2007 (E)
3.2.3
curved work
machining of a curve on a work-piece by having one side in contact with the table (or if held in a jig with the jig
in contact with the table) and the other in contact with the vertical reference of a steady (see Figure 2) or ball
ring guide when using a jig
Figure 2 — Example of curved work
3.2.4
tenoning
machining of projections and slots on the end of a work-piece to facilitate the joining of work-pieces. This
includes profiled tenons (see Figure 3)
Key
1 tenon
2 slot
Figure 3 — Example of workpiece with tenon/slot
10
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EN 848-1:2007 (E)
3.2.5
stopped straight work
machining of only a part of the work-piece length (see Figure 4)
Key
1 end stop to prevent kickback
Figure 4 — Example of stopped straight work
3.2.6
glass bead saw unit
work unit fitted with a saw-blade to cut out a glass bead from the machined profile of the work-piece (e.g. see
Figure 5)
11
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EN 848-1:2007 (E)
Key
1 glass bead saw-blade
2 bead ledge separator
3 anti-kickback finger
4 pressure device
5 guiding channel for glass bead ledge
6 glass bead ledge
7 workpiece
8 fixed safeguard for glass bead saw blade
9 automatic guard for glass bead saw blade
10 fence
11 feed direction
Figure 5 — Example of glass bead recovery unit
3.2.7
hand feed
manual holding and/or guiding of the work-piece. Hand feed may include the use of a hand operated carriage
on which the work-piece is placed manually or clamped and the use of a de-mountable power feed unit
3.2.8
de-mountable power feed unit
power feed mechanism which is mounted on the machine so that it can be moved from its working position to
a rest position and vice versa without the use of a spanner or similar additional device
3.2.9
speed range
range between the lowest and the highest rotational speed for which th
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