prEN ISO 19085-21

SLOVENSKI STANDARD
01-november-2024
Lesnoobdelovalni stroji - Varnost - Krožne žage - 21. del: Dvolistne krožne žage za
prečni rez z vgrajenim podajalnikom
Woodworking machines - Safety - Part 21: Double blade circular sawing machines for
cross-cutting with integrated feed (ISO/DIS 19085-21:2024)
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 9:
Doppelgehrungskreissägemaschinen mit mechanischem Vorschub und
Handbeschickung und/oder Handentnahme
Machines à bois - Sécurité - Partie 21: Machines à scier à deux lames de scie circulaires
pour tronçonnage avec avance mécanisée (ISO/DIS 19085-21:2024)
Ta slovenski standard je istoveten z: prEN ISO 19085-21
ICS:
13.110 Varnost strojev Safety of machinery
25.080.60 Strojne žage Sawing machines
79.120.10 Lesnoobdelovalni stroji Woodworking machines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 19085-21
ISO/TC 39/SC 4
Woodworking machines — Safety —
Secretariat: UNI
Part 21:
Voting begins on:
Double blade circular sawing 2024-09-10
machines for cross-cutting with
Voting terminates on:
2024-12-03
integrated feed
ICS: 13.110; 79.120.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
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This document is circulated as received from the committee secretariat.
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NATIONAL REGULATIONS.
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 19085-21:2024(en)
DRAFT
ISO/DIS 19085-21:2024(en)
International
Standard
ISO/DIS 19085-21
ISO/TC 39/SC 4
Woodworking machines — Safety —
Secretariat: UNI
Part 21:
Voting begins on:
Double blade circular sawing
machines for cross-cutting with
Voting terminates on:
integrated feed
ICS: 13.110; 79.120.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 19085-21:2024(en)
ii
ISO/DIS 19085-21:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Safety requirements and measures for controls . 6
4.1 Safety and reliability of control systems.6
4.2 Control devices .6
4.3 Start .6
4.3.1 Direct start .6
4.3.2 Start via control power-on .6
4.3.3 Cutting stroke .6
4.4 Safe stops .7
4.4.1 General .7
4.4.2 Normal stop .7
4.4.3 Operational stop .7
4.4.4 Emergency stop .7
4.5 Braking function of tools .7
4.6 Mode selection .7
4.7 Tool speed changing .8
4.7.1 Speed changing by shifting the belts on the pulleys .8
4.7.2 Speed changing by incremental speed change motor .8
4.7.3 Infinitely variable speed by frequency inverter .8
4.8 Failure of any power supply .8
4.9 Manual reset control .8
4.10 Standstill detection and monitoring .8
4.11 Machine moving parts speed monitoring.8
4.12 Time delay.8
4.13 Teleservice .8
4.14 Power-operated adjustments .8
5 Safety requirements and measures for protection against mechanical hazards . 9
5.1 Stability .9
5.2 Risk of break-up during operation .9
5.3 Tool and tool fixing design .10
5.3.1 General .10
5.3.2 Spindle locking .10
5.3.3 Circular saw blade fixing device .10
5.3.4 Flange dimension for circular saw blades .10
5.4 Braking .10
5.4.1 Braking of tools .10
5.4.2 Maximum run-down time .10
5.4.3 Brake release .10
5.5 Safeguards .10
5.5.1 Fixed guards .10
5.5.2 Interlocking moveable guards .10
5.5.3 Hold-to-run control .11
5.5.4 Two-hand control .11
5.5.5 Electro-sensitive protective equipment (ESPE) .11
5.5.6 Pressure sensitive protective equipment (PSPE) .11
5.5.7 Enabling control .11
5.6 Prevention of access to hazardous moving parts .11
5.6.1 Safeguarding of the saw blades in the rest position on downwards-cutting
machines . 12

iii
ISO/DIS 19085-21:2024(en)
5.6.2 Safeguarding of the saw blades in the rest position on horizontal and upward
cutting machines .
...