SIST EN 12413:2007
(Main)Safety requirements for bonded abrasive products
Safety requirements for bonded abrasive products
This standard is applicable to rotating bonded abrasive products. It specifies requirements and/or measures for the removal or reduction of hazards resulting from the design and application of the abrasive products.
This standard also contains procedures and tests for verification of compliance with the requirements as well as safety information for use, which is to be made available to the user by the manufacturer.
The hazards taken into consideration are listed in Clause 4 of this standard.
This standard does not apply to superabrasives and coated abrasive products.
Sicherheitsanforderungen für Schleifkörper aus gebundenem Schleifmittel
Diese Norm gilt für rotierende Schleifkörper aus gebundenem Schleifmittel. Sie legt Anforderungen und/oder Maßnahmen zur Beseitigung oder Verringerung von Gefährdungen fest, die von der Gestaltung und Anwendung der Schleifwerkzeuge herrühren.
Diese Norm umfasst auch Verfahren und Prüfungen zur Feststellung der Übereinstimmung mit den Anforderungen sowie Benutzerinformationen, die der Hersteller dem Anwender zur Verfügung zu stellen hat.
Die berücksichtigten Gefährdungen sind in Abschnitt 4 dieser Norm aufgeführt.
Diese Norm gilt nicht für Schleifkörper mit Diamant oder Bornitrid als Schleifmittel und nicht für Schleifmittel auf Unterlagen.
Exigences de sécurité pour les produits abrasifs agglomérés
La présente norme s'applique aux produits abrasifs agglomérés rotatifs. Elle spécifie les exigences et/ou mesures pour la suppression ou la réduction des risques résultant de la conception et de l'application des produits abrasifs.
La présente norme contient également les modes opératoires et les essais permettant de vérifier la conformité avec les exigences ainsi que les informations de sécurité pour l'utilisation que le fabricant doit fournir a l’utilisateur.
Les phénomenes dangereux a prendre en considération sont listés a l'Article 4 de la présente norme.
La présente norme ne s'applique pas aux superabrasifs, ni aux produits abrasifs appliqués.
Varnostne zahteve za vezana brusilna sredstva
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Safety requirements for bonded abrasive productsVarnostne zahteve za vezana brusilna sredstvaExigences de sécurité pour les produits abrasifs agglomérésSicherheitsanforderungen für Schleifkörper aus gebundenem SchleifmittelTa slovenski standard je istoveten z:EN 12413:2007SIST EN 12413:2007en,fr25.100.70BrusivaAbrasivesICS:SIST EN 12413:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 12413:200701-september-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12413June 2007ICS 25.100.70Supersedes EN 12413:1999
English VersionSafety requirements for bonded abrasive productsExigences de sécurité pour les produits abrasifsagglomérésSicherheitsanforderungen für Schleifkörper ausgebundenem SchleifmittelThis European Standard was approved by CEN on 10 May 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12413:2007: E
EN 12413:2007 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Definitions and symbols.5 3.1 Bonded abrasive products.5 3.2 Grinding machines.5 3.3 Grinding method.6 3.4 Type of application.6 3.5 Symbols.7 4 List of significant hazards.8 5 Requirements.8 5.1 General requirements.8 5.2 Strength requirements.9 5.3 Dimensional requirements.10 5.4 Admissible unbalance.30 5.5 Marking.30 5.6 Blotters.30 6 Verification of the requirements and inspection.30 6.1 Verification methods.30 6.2 Scope of inspection by the manufacturer.31 7 Information for use.33 Annex A (normative)
Marking.34 A.1 Content of marking.34 A.2 Execution of marking.37 Annex B (informative)
Mounted points.38 B.1 Example calculation of the maximum permissible speeds of rotation.38 B.2 Example for application of the calculation method.42 Annex C (normative)
Verification methods for side load capacity.44 C.1 General.44 C.2 Single point side load.44 C.3 Three point side load.45 C.4 Impact test.45 Annex D (informative)
Colour codes.47 Annex E (informative)
Speed conversion table.48 Bibliography.49
EN 12413:2007 (E) 3 Foreword This document (EN 12413:2007) has been prepared by Technical Committee CEN/TC 143 “Machine tools — Safety”, the secretariat of which is held by SNV. 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 December 2007, and conflicting national standards shall be withdrawn at the latest by December 2007. This document supersedes EN 12413:1999. Significant technical differences between this edition and EN 12413:1999 are as follows: a) Deletion of different abbreviations in Table 1 to Table 4 and Table 7; b) deletion of 140 m/s and 160 m/s in Clause 5.1.1; c) revision of Table 11 "Maximum operating speeds, safety factors and minimum bursting speeds for different types of machine and types of application". In the revised Table 11 (now Table 4) are there only relations between the range of vs, the safety factor Sbr and burst speed factor fbr; d) in Clause 5.1.3 "Side load capacity" (new Clause 5.2.3) are the relevant values for the different tests depending on vs and the outside diameter of the abrasive product; e) extension of requirements in Clause 5.6 "Blotters", Annex B "Blotters" (normative) is completely deleted; f) revision of Clause 6 in accordance with rules for the structure and drafting of CEN/CENELEC publications; g) Table 13 "Safety test speeds" deleted and revision of Table 14 "Scope of the inspection"; h) revision of Clause 7 "Information for use"; i) content of Table A.2 "Colour codes and design of colour codes" to change as additional marking in Annex D (informative); j) in Table A.3 "Restrictions of use", RE2 deleted and RE8 included; k) Figures A.1, A.2 and Clause A.4 "Design of the marking" deleted; l) revision of Annex C (normative), [now Annex B (informative)], Mounted points only as an example calculation of the maximum permissible speed of rotation; m) extension of Annex D (informative), [now Annex C (normative)], with additional requirements concerning the verification methods for side load capacity. 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.
EN 12413:2007 (E) 4 Introduction This standard has been prepared to provide one means of conforming with essential safety requirements, e.g. of the Safety Product Directive and associated EFTA regulations. This standard is addressed to designers, manufacturers and suppliers of the abrasive products described in the scope. In addition, it helps designers, manufacturers and suppliers of grinding machines in the selection of abrasive products, in order to reduce the risks and achieve conformity of the respective machinery with the Essential safety requirements of the Machinery Directive. The extent to which hazards are covered is indicated in the scope of this standard.
EN 12413:2007 (E) 5
1 Scope This standard is applicable to rotating bonded abrasive products. It specifies requirements and/or measures for the removal or reduction of hazards resulting from the design and application of the abrasive products. This standard also contains procedures and tests for verification of compliance with the requirements as well as safety information for use, which is to be made available to the user by the manufacturer. The hazards taken into consideration are listed in Clause 4 of this standard. This standard does not apply to superabrasives and coated abrasive products. 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 ISO 6103, Bonded abrasive products — Permissible unbalances of grinding wheels as delivered — Static testing (ISO 6103:2005) ISO 525, Bonded abrasive products -- General requirements ISO 13942, Bonded abrasive products — Limit deviations and run-out tolerances 3 Definitions and symbols 3.1 Bonded abrasive products Products consisting of abrasives e.g. aluminium oxide, silicon carbide held together by a bond. Bonded abrasive products within the meaning of this standard are all products as defined, see for example by ISO 525. 3.2 Grinding machines 3.2.1 Stationary machines Machines that are fixed in position during operation, see for example EN 13218. Included are fixed swing-frame machines and mobile machines clamped firmly in position during use. 3.2.2 Mobile machines Machines that are not fixed in position during operation. They are manually guided (but not supported) by hand during use, e.g. floor grinding machines, flexibly suspended swing-frame grinding machines. 3.2.3 Hand-held machines Machines, including those with flexible drives that are held in the hand during the grinding process, see for example EN 792-7, EN 792-9, EN 60745-2-3 and EN ISO 19432. 3.2.4 Machines with totally enclosed working area Stationary machines that are protected in such a way by separating guards that machining processes including loading and unloading of workpieces are carried out inside them and persons are protected against hazards generated by bursting of an abrasive product.
EN 12413:2007 (E) 6 3.3 Grinding method 3.3.1 Peripheral grinding Grinding with the periphery of the wheel with no or limited side loads. 3.3.2 Face grinding Grinding with the face of the wheel. 3.3.3 Cutting-off Cutting-off or slotting with the periphery of the cutting-off wheel. 3.3.4 High pressure grinding Grinding with high contact pressure for steel conditioning. 3.4 Type of application 3.4.1 General See Table 1. 3.4.2 Mechanically guided grinding Feed movements of the grinding tool and/or the workpiece are guided by mechanical means. 3.4.3 Manually guided grinding Feed movements of the grinding tool and/or the workpiece are manually guided by the operator. 3.4.4 Hand-held grinding Grinding machine is entirely guided by the operator's hands. Table 1 — Type of application Type of grinding machine Type of application Abrasive product Workpiece Fixed Guided mechanically Guided mechanically Fixed Stationary machines Mechanically guided grinding Guided mechanically Guided mechanically Guided by hand Fixed Stationary and mobile machines Manually guided grinding Fixed Guided by hand Hand-held machines Hand-held grinding Guided by hand Fixed
EN 12413:2007 (E) 7 3.5 Symbols Table 2 — Symbols Abbrevia- tions Designation Definition Unit nab Deflection speed of mounted points Revolutions per minute at which the spindle of mounted points is deflecting under centrifugal force 1/min nmax Maximum permissible speed of rotation Revolutions per minute of the new abrasive product at maximum operating speed 1/min vs Maximum operating speed Maximum permissible peripheral speed of a rotating abrasive product m/s vpr Safety test speed Peripheral speed at which abrasive products are tested by the manufacturer m/s fpr Test speed factor Safety test speed divided by maximum operating speed:
sprprvvf= — fbr Burst speed factor
Minimum bursting speed divided by maximum operating speed:
sbrbrvvfmin= — vbr Bursting speed Peripheral speed at which the abrasive product breaks due to centrifugal force m/s vbr min Minimum bursting speed Peripheral speed, which the abrasive product shall at least reach without bursting due to centrifugal force m/s Sbr Safety factor against bursting due to centrifugal force Bursting speed divided by maximum operating speed, all squared:
2=sbrbrvvS — Sab Safety factor of spindle deflection for mounted points Deflection speed divided by maximum permissible speed of rotation:
maxnnSabab= — A Impact resistance Resistance of a rotating abrasive product to lateral impact Nm FS1 Single point side load Resistance of a rotating abrasive product to lateral single point load N FS3 Three point side load Resistance of a rotating abrasive product to lateral three point load N
EN 12413:2007 (E) 8
4 List of significant hazards Table 3 — List of significant hazards Hazard designation Hazardous situation (Examples) Relevant clauses in this standard 1. Wheel breakage caused by
— improper design 5.1, 5.2, 5.3 and Annex C — manufacturing defects 5.1 — wrong selection 5.5, 7 and Annex A — improper handling and storage 7 — improper use (mounting and grinding process) 5.6, 7 and Annex A Ejection of parts 2. Grinding debris 7 Hand arm vibration on hand-held machines caused by
— manufacturing defects 5.3 and 5.4 — improper use 7 Vibration — incorrect mounting 7
5 Requirements 5.1 General requirements 5.1.1 General Abrasive products shall be designed and manufactured in such a way that they resist the forces and loads that are to be expected when used as intended. They shall not present visible faults and shall comply with the requirements listed in the following clauses. 5.1.2 Maximum operating speeds Abrasive products shall be manufactured for maximum operating speeds according to the following range: < 16 — 16 — 20 — 25 — 32 — 35 — 40 — 45 — 50 — 63 — 80 — 100 — 125 in m/s The only exception to this is where the application requirements dictate an intermediate speed. The manufacturer can select any of these speeds up to the maximum values shown in Table 6. For a conversion table for speeds of rotation and maximum operating speeds as a function of the outside diameter D of the abrasive products, see Annex E.
EN 12413:2007 (E) 9 5.2 Strength requirements 5.2.1 Safety factors Abrasive products — with the exception of mounted wheels and points — shall have a safety factor against bursting due to centrifugal forces at their maximum operating speed as given in Table 4. Table 4 — Safety factors Type of machine Type of abrasive product Maximum operating speed vs m/s Safety factor Sbr
Burst speed factor fbr
High pressure grinding wheels ≤ 80 3,5 1,87 ≤ 80 3,5a 1,87 Cutting-off wheels ≤ 100 2,0 1,41 Stationary machines All other types all 3,0 1,73 High pressure grinding wheels ≤ 100 3,0 1,73 Stationary machines totally enclosed All other types all 1,75 1,32 Mobile
machines Grinding and cutting-off wheels ≤ 100 3,5 1,87 ≤ 50 3,0 1,73 Grinding wheels D > 125 mm 50 < vs ≤ 80 3,5 1,87 Cutting-off wheels D > 125 mm ≤ 100 3,5 1,87 ≤ 80 3,0 1,73 Hand-held machines All types D ≤ 125 mm > 80 3,5 1,87 a Only manually guided cutting-off.
5.2.2 Safety factors for mounted wheels and points Mounted wheels and points shall have a safety factor against bursting due to centrifugal forces of Sbr = 3 at their maximum operating speed. The spindle shall have a safety factor against deflection of Sab = 1,3. For further requirements, see Annex B.
EN 12413:2007 (E) 10 5.2.3 Side load capacity Depressed-centre wheels, straight cutting-off wheels and depressed-centre cutting-off wheels for the use on hand-held grinding machines shall have a side load capacity according to Table 5. Table 5 — Side load capacity of abrasive products for the use on hand-held machines Side load capacity Single point side load test Three point side load test Impact test Abrasive
product Maximum operating speed Outside
diameter Single point side load Three point side load Impact resistance
vs D FS1 FS3 A
m/s mm N N Nm
≥ 115 290 — —
150 290 — 4,5
180 290 — 5,4 Depressed-centre grinding wheels (type 27a, type 28a and type 29b) ≤ 80
230 290 — 6,9
≥ 115
40 — —
150
50 — 1,2
180
50 — 1,5
230
50 — 2,0
300 125 150 5,4 350/356 125 150 5,4 ≤ 80 400/406 125 150 5,4
300 125 150 5,4 350/356 125 150 5,4 Straight and depressed-centre cutting-off wheels (type 41 and type 42)a 80 < vs ≤ 100 400/406 125 150 5,4 a According to ISO 525. b With back-up pad as intended for the type of application.
5.3 Dimensional requirements 5.3.1 Dimensional limitations and maximum operating speeds Bonded abrasive products shall comply with the dimensional limitations and maximum operating speeds as specified in Table 6.
EN 12413:2007 (E) 11 Table 6 — Dimensional limitations and maximum operating speeds Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL 25*) H ≤ 0,67 D
63
63—
63
6363 Type 1 Straight grinding wheel Mechanically guided grinding 40506350—40
16**)50 H ≤ 0,50 D
80
80
80
80
80— Mechanically guided grinding totally enclosed
H ≤ 0,67 D — ————— — — H ≤ 0,50 D 125100100100— — Mechanically guided high pressure grinding — 80———— — — — — — — — — — Stationary grinding machines Mechanically guided high pressure grinding totally enclosed H ≤ 0,50 D — ————— — — H ≤ 0,33 D — 100— — — — 25*) H ≤ 0,50 D —
63—
63
63—
Stationary and mobile grinding machines Manually guided grinding H ≤ 0,67 D 355063505040
16**)50 H ≤ 0,33 D — —
80—
80— D × T × Hb Hand-held grinding machines Hand-held grinding H ≤ 0,25 D — 50805080— — 50 H ≤ 0,25 D —
63—
63— —
*) D ≤ 1 000 mm **) D > 1 000 mm a Definitions see 3.2 and 3.3. b Types of bond and designation examples see ISO 525. (continued)
EN 12413:2007 (E) 12 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 2 Cemented or clamped cylinder wheel Mechanicallyguided grinding 3240———— 25 40 63 63 — — — 50
Key 1 Plate D × T × W b Stationary grinding machines Manually guided grinding W < 0,17 D 3240———— — 40 W < 0,17 D — 50 — — — 50 a Definitions see 3.2 and 3.3. b Types of bond and designation examples see ISO 525. (continued)
EN 12413:2007 (E) 13 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFRRFE MG PL Dimensionallimitations V B BF R RF PL H ≤ 0,67 D
63
63—
63—
63Type 3 Wheel tapered on one side Mechanically guided grinding 4050—50—— — 50 H ≤ 0,50 D
80
80—
80— —
D/J × T × H b Stationary grinding machines Mechanically guided grinding totally enclosed H ≤ 0,67 D — ————— — — H ≤ 0,50 D 125100— 100— — Type 4 Wheel tapered on both sides
D × T × H b Hand-held grinding machines Hand-held grinding D ≤ 200 — 5080——— — — — — — — — — — a Definitions see 3.2 and 3.3. b Types of bond and designation examples see ISO 525. (continued)
EN 12413:2007 (E) 14 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 5 Wheel recessed on one side H ≤ 0,67 D E ≥ 0,50 T
63
6363
6363 63 Mechanically guided grinding 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
8080
8080 — Stationary grinding machines Mechanically guided grinding totally enclosed — ————— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — H ≤ 0,50 D E ≥ 0,50 T — — 63 — 63 — Stationary and mobile grinding machines Manually guided grinding H ≤ 0,67 D E ≥ 0,50 T 3550—50—— — 50 H ≤ 0,33 D E ≥ 0,50 T — — 80 — 80 —
D × T × H-P × F b Hand-held grinding machines Hand-held grinding H ≤ 0,25 D E ≥ 0,75 T — 50805080— — 50 H ≤ 0,25 D E ≥ 0,75 T —
63—
63— — a Definitions see 3.2 and 3.3. b Types of bond and designation examples, see ISO 525. (continued)
EN 12413:2007 (E) 15 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 6 Straight cup wheel Mechanically guided grinding 3240—40—— — 40
63
63—
63— — Stationary grinding machines Manually guided grinding E ≥ 0,20 T 3240—40—— — 40 E ≥ 0,20 T —
50— — — —
D × T × H-W × E b Hand-held grinding machines Hand-held grinding D ≤ 180 T ≤ 70 E ≥ 0,25 T — 50———— — — — — — — — — — Type 7 Wheel recessed on both sides H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding 4050—50—— — 50
80
80—
80— —
D × T × H-P × F/G b Stationary grinding machines Mechanically guided grinding totally enclosed H ≤ 0,67 D E ≥ 0,50 T — ————— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — a Definitions see 3.2 and 3.3. b Types of bond and designation examples see ISO 525. (continued)
EN 12413:2007 (E) 16 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 9 Double cup wheel
D × T × H-W × E b Stationary grinding machines Mechanically guided grinding E ≥ 0,2 T 3240—40—— — 40 E ≥ 0,2 T 50 50 — 50 — — Type 11 Taper cup wheel Mechanically guided grinding E ≥ 0,2 T 3240—40—— — 40 E ≥ 0,2 T 50 50 — 50 — — Mechanically guided grinding totally enclosed — — ————— — — E ≥ 0,2 T 63 80 — 63 — 50
Stationary grinding machines Manually guided grinding E ≥ 0,2 T 3240—40—— — 40 — — — — — — — D/J × T × H-W × E b Hand-held grinding machines Hand-held grinding E ≥ 0,25 T — 50———— — 40 — — — — — — — a Definitions see 3.2 and 3.3. b Types of bond and designation examples see ISO 525. (continued)
EN 12413:2007 (E) 17 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 12 Dish wheel Mechanically guided grinding E ≥ 0,5 T 3240—40—— — 40 E ≥ 0,5 T 50 50 — 50 — — Mechanically guided grinding totally enclosed — — ————— — — E ≥ 0,5 T 63 80 — 63 — 50
D/J × T × H b Manually guided grinding
(tool sharpening) E ≥ 0,5 T 3240—40—— — — — — — — — — — Type 13 Saucer wheel Mechanically guided grinding E ≥ 0,5 T 3240—40—— — 40 E ≥ 0,5 T 50 50 — 50 — — Mechanically guided grinding totally enclosed — — ————— — — E ≥ 0,5 T 63 80 — 63 — 50
D/J × T/U × H-K b Stationary grinding machines Manually guided grinding
(tool sharpening) E ≥ 0,5 T 3240—40—— — — — — — — — — — a Definitions see 3.2 and 3.3. b Types of bond and designation examples, see ISO 525. (continued)
EN 12413:2007 (E) 18 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Cones and plugs Examples: Type 16
Type 17
Type 18 Type 18R
Type 19
D × T-H × L b Hand-held grinding machines Hand-held grinding D ≤
80 T ≤ 100 4050———— — — D ≤
80 T ≤ 100 50 — — — — — a Definitions see 3.2 and 3.3. b Types of bond and designation examples, see ISO 525. (continued)
EN 12413:2007 (E) 19 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 20 Wheel relieved on one side H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
80—
80—
D/K × T/N × H b Mechanically guided grinding totally enclosed H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — Type 21 Wheel relieved on both sides H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
80—
80— —
D/K × T/N × H b Stationary grinding machines Mechanically guided grinding totally enclosed H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — a Definitions see 3.2 and 3.3. b Types of bond and designation examples, see ISO 525. (continued)
EN 12413:2007 (E) 20 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 22 Wheel relieved on one side and recessed on the other side H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
80—
80— —
D/K × T/N × H-P × F b Mechanically guided grinding totally enclosed H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — Type 23 Wheel relieved and recessed on one side H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
80—
80— —
D × T/N × H-P × F b Stationary grinding machines Mechanically guided grinding totally enclosed H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — — H ≤ 0,50 D E ≥ 0,50 T 100100— 100— — a Definitions see 3.2 and 3.3. b Types of bond and designation examples, see ISO 525. (continued)
EN 12413:2007 (E) 21 Table 6 (continued) Maximum operating speeds and dimensional limitations Standard operating speeds Special operating speeds m/s m/s Types of bondb Types of bondb Shape, designation, dimensional letters Type of
machinea Type of
applicationa Dimensionallimitations V B BFR RFE MG PL Dimensional limitations V B BF R RF PL Type 24 Wheel relieved and recessed on one side and recessed on the other H ≤ 0,67 D E ≥ 0,50 T
63
63—
63— 63 Mechanically guided grinding H ≤ 0,67 D E ≥ 0,50 T 4050—50—— — 50 H ≤ 0,50 D E ≥ 0,50 T
80
80—
80— —
D × T/N ×
...
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