oSIST prEN ISO 19085-20:2024

SLOVENSKI STANDARD
01-november-2024
Varnost lesnoobdelovalnih strojev - Krožne žage - 11. del: Polavtomatske
horizontalne krožne žage za prečni rez z eno rezalno enoto (radialne žage)
(ISO/DIS 19085-20:2024)
Woodworking machines - Safety - Part 20: Horizontal cutting cross-cut sawing machines
with one saw unit (radial arm saws) (ISO/DIS 19085-20:2024)
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 11:
Halbautomatische waagrecht schneidende Auslegerkreissägemaschinen mit einem
Sägeaggregat (Radialsägen) (ISO/DIS 19085-20:2024)
Machines à bois - Sécurité - Partie 20: Tronçonneuses à coupe horizontale avec une
unité de sciage (scies à bras radial) (ISO/DIS 19085-20:2024)
Ta slovenski standard je istoveten z: prEN ISO 19085-20
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 19085-20
ISO/TC 39/SC 4
Woodworking machines — Safety —
Secretariat: UNI
Part 20:
Voting begins on:
Horizontal cutting cross-cut sawing 2024-09-10
machines with one saw unit (radial
Voting terminates on:
2024-12-03
arm saws)
ICS: 13.110; 79.120.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
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Reference number
ISO/DIS 19085-20:2024(en)
DRAFT
ISO/DIS 19085-20:2024(en)
International
Standard
ISO/DIS 19085-20
ISO/TC 39/SC 4
Woodworking machines — Safety —
Secretariat: UNI
Part 20:
Voting begins on:
Horizontal cutting cross-cut sawing
machines with one saw unit (radial
Voting terminates on:
arm saws)
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
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Published in Switzerland Reference number
ISO/DIS 19085-20:2024(en)
ii
ISO/DIS 19085-20:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Safety requirements and measures for controls . 5
4.1 Safety and reliability of control systems.5
4.2 Control devices .5
4.3 Start .6
4.3.1 Direct start .6
4.3.2 Start via control power-on .6
4.3.3 Power-operated 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 .7
4.7.1 Speed changing by shifting the belts on the pulleys .7
4.7.2 Speed changing by incremental speed change motor .7
4.7.3 Infinitely variable speed by frequency inverter .7
4.8 Failure of any power supply .7
4.9 Manual reset control .7
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 tilting of the saw unit .8
5 Safety requirements and measures for protection against mechanical hazards . 8
5.1 Stability .8
5.2 Risk of break-up during operation .8
5.3 Tool and tool fixing design .9
5.3.1 General .9
5.3.2 Spindle locking .9
5.3.3 Circular saw blade fixing device .9
5.3.4 Flange dimension for circular saw blades .9
5.4 Braking .9
5.4.1 Braking of tools .9
5.4.2 Maximum run-down time .9
5.4.3 Brake release .9
5.5 Safeguards .9
5.5.1 Fixed guards .9
5.5.2 Interlocking moveable guards .9
5.5.3 Hold-to-run control .10
5.5.4 Two-hand control .10
5.5.5 Electro-sensitive protective equipment (ESPE) .10
5.5.6 Pressure sensitive protective equipment (PSPE) .10
5.5.7 Enabling control .10
5.6 Prevention of access to hazardous moving parts .10
5.6.1 Safeguarding the saw blade in machines with manually operated cutting stroke .10
5.6.2 Safeguarding the saw blade in machines with power-operated cutting stroke . 12

iii
ISO/DIS 19085-20:2024(en)
5.6.3 Pivoting of the saw unit . 13
5.6.4 Tilting of the saw
...