IEC 62841-3-9:2014

IEC 62841-3-9 ®
Edition 1.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 3-9: Particular requirements for transportable mitre saws

Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 3-9: Exigences particulières pour les scies à onglets transportables

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IEC 62841-3-9 ®
Edition 1.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety –
Part 3-9: Particular requirements for transportable mitre saws

Outils électroportatifs à moteur, outils portables et machines pour jardins et

pelouses – Sécurité –
Partie 3-9: Exigences particulières pour les scies à onglets transportables

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 25.140.20 ISBN 978-2-8322-1695-8

– 2 – IEC 62841-3-9:2014 © IEC 2014

CONTENTS
FOREWORD . 4

1 Scope . 6

2 Normative references . 6

3 Terms and definitions . 6

4 General requirements . 8

5 General conditions for the tests . 9

6 Radiation, toxicity and similar hazards . 9
7 Classification . 9
8 Marking and instructions . 9
9 Protection against access to live parts . 12
10 Starting . 12
11 Input and current . 12
12 Heating . 12
13 Resistance to heat and fire . 12
14 Moisture resistance . 13
15 Resistance to rusting . 13
16 Overload protection of transformers and associated circuits . 13
17 Endurance . 13
18 Abnormal operation . 13
19 Mechanical hazards . 13
20 Mechanical strength . 18
21 Construction . 19
22 Internal wiring . 23
23 Components . 23
24 Supply connection and external flexible cables and cords . 24
25 Terminals for external conductors . 24
26 Provision for earthing . 24
27 Screws and connections . 24
28 Creepage distances, clearances and distances through insulation . 24

Annex I (informative) Measurement of noise and vibration emissions . 31
Annex K (normative) Battery tools and battery packs . 32
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 32
Bibliography . 33

Figure 101 – Mitre saw . 24
Figure 102 – Saw blade quadrants . 25
Figure 103 – Open guard construction . 25
Figure 104 – Position of saw blade and lower guard relative to saw table . 26
Figure 105 – Test probe . 26
Figure 106 – Workpiece support dimensions . 27

Figure 107 – Minimum extension offence . 28

Figure 108 – Distance between fence and saw blade . 29

Figure 109 – Mitre saw with centre workpiece support . 29

Figure 110 – Flange characteristics . 30

Table 4 – Required performance levels . 13

Table I.101 – Noise test conditions for mitre saws . 31

– 4 – IEC 62841-3-9:2014 © IEC 2014

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,

TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –

SAFETY –
Part 3-9: Particular requirements for transportable mitre saws

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62841-3-9 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
The text of this standard is based on the following documents:
FDIS Report on voting
116/181/FDIS 116/192/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

This Part 3-9 is to be used in conjunction with the IEC 62841-1:2014.

This Part 3-9 supplements or modifies the corresponding clauses in IEC 62841-1, so as to

convert it into the IEC Standard: Particular requirements for transportable mitre saws.

Where a particular subclause of Part 1 is not mentioned in this Part 3-9, that subclause

applies as far as reasonable. Where this standard states “addition”, “modification” or

“replacement”, the relevant text in Part 1 is to be adapted accordingly.

The following print types are used:

– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The terms defined in Clause 3 are printed in bold typeface.
Subclauses, notes and figures which are additional to those in Part 1 are numbered starting
from 101.
A list of all parts of the IEC 62841 series, under the general title: Electric motor-operated
hand-held tools, transportable tools and lawn and garden machinery – Safety, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 36 months from the date of publication.

The contents of the corrigendum of October 2015 and August 2016 have been included in
this copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 62841-3-9:2014 © IEC 2014

ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,

TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –

SAFETY –
Part 3-9: Particular requirements for transportable mitre saws

1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to transportable mitre saws intended to be used with a
toothed saw blade for cutting wood and analogous materials, plastics and nonferrous metals
except magnesium with a saw blade diameter not exceeding 360 mm, which hereinafter might
simply be referred to as saw or tool.
This standard does not apply to mitre saws intended to cut other metals, such as
magnesium, steel and iron. This standard does not apply to mitre saws with an automatic
feeding device.
NOTE 101 Transportable saws intended to cut ferrous metals will be covered by a future part of IEC 62841-3.
This standard does not apply to saws designed for use with abrasive wheels.
NOTE 102 Transportable tools designed for use with abrasive wheels are covered by IEC 62841-3-10.
This standard does not apply to tools combining the function of a mitre saw with the function
of a table saw.
NOTE 103 Transportable tools combining the function of a mitre saw with the function of a table saw are covered
by IEC 62841-3-11.
2 Normative references
This clause of Part 1 is applicable, except as follows:

Addition:
ISO 180, Plastics – Determination of Izod impact strength
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
bevel angle
angular displacement of the saw blade plane with respect to the table top plane, the position
of the saw blade plane that is perpendicular to the table top being the 0° bevel position

3.102
compound angle
angular displacement of the saw blade plane having a bevel and mitre angle other than 0°

3.103
cutting edge zone
outer 20 % of the radius of the saw blade

3.104
D
specified diameter of the saw blade

3.105
fence
device to position the workpiece and absorb the horizontal forces from the saw blade during
the cutting process
3.105.1
centre workpiece support
device as illustrated in Figure 109 that has a face supporting the workpiece in conjunction
with the fence
3.106
fully down position
position of the saw unit after adjustment of the saw in accordance with 8.14.2 a) 107) and
any depth-of-cut stop as in 8.14.2 a) 108) disengaged or adjusted in order to produce the
lowest position of the saw unit
3.107
horizontal cutting capacity
largest dimension perpendicular from the plane of the fence (width) of a workpiece with
rectangular cross section that can be completely cut through with a single pass of the saw
blade
Note 1 to entry: 5.101 provides a measurement procedure for horizontal cutting capacity.
3.108
kerf
distance between two parallel planes that are touching the opposing sides of at least three
saw blade tooth tips
3.109
kerf plate
portion of the table top on both sides of the saw blade intersect line with the table top for the
purpose of minimizing the tearing of the wood fibres by the saw blade
Note 1 to entry: Depending on the design, the kerf plate is adjustable, replaceable or an integral part of the table
top.
3.110
mitre angle
angular displacement of the plane of the fence with respect to the cutting line, the position of
the saw blade plane that is perpendicular to the plane of the fence being the 0° mitre position
3.111
mitre saw
saw consisting of a table top and a fence which support and position the workpiece, and a
saw unit, projecting over the table top

– 8 – IEC 62841-3-9:2014 © IEC 2014

Note 1 to entry: Cutting is achieved by moving the saw unit through a plunging action or a combination of

plunging and sliding actions. The workpiece does not move with respect to the table top or fence during cutting.
The saw unit can be adjustable to cut at a bevel angle, a mitre angle or both angles to create a compound angle

cut. See Figure 101
3.112
quadrants (of the saw blade)
with the saw unit in the fully down position, the saw blade quadrants are defined by two
lines intersecting the centre of the saw blade, where one line is parallel to the table top and
the other line is perpendicular to the first line.

Note 1 to entry: The quadrants remain fixed in relation to the saw unit as it moves between the rest position

and the fully down position (see Figure 102):

– quadrant “A” is above the line parallel to the table top and away from the operator’s position;
– quadrant “B” is above the line parallel to the table top and closer to the operator’s position;
– quadrant “C” is below the line parallel to the table top and closer to the operator’s position;
– quadrant “D” is below the line parallel to the table top and away from the operator’s position.
3.113
rest position
position of a saw unit in its uppermost position from the table top and, for mitre saws with a
sliding action, at the maximum sliding position towards the fence
3.114
saw unit
device with an affixed saw blade, capable of performing a cutting action
3.115
table top
horizontal surface that is in contact with and supports the workpiece and typically consists of
a turn table, a table base on each side of the turn table and workpiece support extension(s)
Note 1 to entry: See Figure 101.
3.116
turn table
workpiece supporting device that facilitates the mitre angle adjustment
3.117
vertical cutting capacity
largest height dimension above the table top (thickness) of a workpiece with rectangular
cross section having a width dimension equal to the horizontal cutting capacity, that can be
completely cut through with a single pass of the saw blade

4 General requirements
This clause of Part 1 is applicable, except as follows:
Addition:
4.101 Throughout the remaining part of this document, unless otherwise explicitly stated,
whenever a requirement or a reference is made to
– “saw blade”:
this shall equally apply to any “saw blade” as specified in accordance with 8.14.2 a);
– “force” as a multiple of D:
the force shall be expressed in newtons (N) and the saw blade diameter D shall be
expressed in millimetres (mm).

5 General conditions for the tests

This clause of Part 1 is applicable, except as follows:

5.17 Addition:
The mass of the tool shall include the fences and required workpiece clamp(s) in accordance

with 21.104. Further parts such as carrying means that are required in accordance with the

instructions for the safe use of the tool shall be included in the mass.

5.101 Procedure to determine the horizontal cutting capacity

The mitre saw is fitted with a 2 mm thick steel disc of diameter D in place of the saw blade
and is set to 0° bevel angle. The saw unit is at its fully down position and, for a mitre saw
with a sliding function, the saw unit is at its maximum extended horizontal position from the
fence. The mitre saw is set for the mitre angle for which the horizontal cutting capacity
measurement is desired.
Horizontal cutting capacity:
The horizontal cutting capacity is the perpendicular distance measured in the plane of the
table top from the fence to the intersect point of the steel disc periphery in quadrant “C” with
the plane of the table top.
6 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
7 Classification
This clause of Part 1 is applicable.
8 Marking and instructions
This clause of Part 1 is applicable, except as follows:
8.1 Addition:
Mitre saws shall be marked with:
– rated no-load speed of the output spindle.
8.3 Addition:
Mitre saws shall be marked with the saw blade diameter(s). The marked value(s) shall not be
larger than D and shall not be less than 0,96 D.
Mitre saws shall be marked with the direction of rotation of the spindle, indicated in a visible
location on the tool in the vicinity of the saw blade, such as on the saw blade guard, by an
arrow raised or recessed or by any other means no less visible and indelible.
The table top on each side of the saw blade shall be marked with a sign as follows:

– 10 – IEC 62841-3-9:2014 © IEC 2014

This symbol needs not be in accordance with the colour requirements of ISO 3864-2.

8.14.1 Addition:
The additional safety instructions as specified in 8.14.1.101 shall be given. This part may be
printed separately from the “General Power Tool Safety Warnings”.
8.14.1.101 Safety instructions for mitre saws
a) Mitre saws are intended to cut wood or wood-like products, they cannot be used
with abrasive cut-off wheels for cutting ferrous material such as bars, rods, studs,
etc. Abrasive dust causes moving parts such as the lower guard to jam. Sparks from
abrasive cutting will burn the lower guard, the kerf insert and other plastic parts.
b) Use clamps to support the workpiece whenever possible. If supporting the
workpiece by hand, you must always keep your hand at least 100 mm from either
side of the saw blade. Do not use this saw to cut pieces that are too small to be
securely clamped or held by hand. If your hand is placed too close to the saw blade,
there is an increased risk of injury from blade contact.
c) The workpiece must be stationary and clamped or held against both the fence and
the table. Do not feed the workpiece into the blade or cut “freehand” in any way.
Unrestrained or moving workpieces could be thrown at high speeds, causing injury.
d) Push the saw through the workpiece. Do not pull the saw through the workpiece. To
make a cut, raise the saw head and pull it out over the workpiece without cutting,
start the motor, press the saw head down and push the saw through the workpiece.
Cutting on the pull stroke is likely to cause the saw blade to climb on top of the workpiece
and violently throw the blade assembly towards the operator.
NOTE The above warning is omitted for a simple pivoting arm mitre saw.
e) Never cross your hand over the intended line of cutting either in front or behind the
saw blade. Supporting the workpiece “cross handed” i.e. holding the workpiece to the
right of the saw blade with your left hand or vice versa is very dangerous.
f) Do not reach behind the fence with either hand closer than 100 mm from either side
of the saw blade, to remove wood scraps, or for any other reason while the blade is

spinning. The proximity of the spinning saw blade to your hand may not be obvious and
you may be seriously injured.
g) Inspect your workpiece before cutting. If the workpiece is bowed or warped, clamp it
with the outside bowed face toward the fence. Always make certain that there is no
gap between the workpiece, fence and table along the line of the cut. Bent or warped
workpieces can twist or shift and may cause binding on the spinning saw blade while
cutting. There should be no nails or foreign objects in the workpiece.
h) Do not use the saw until the table is clear of all tools, wood scraps, etc., except for
the workpiece. Small debris or loose pieces of wood or other objects that contact the
revolving blade can be thrown with high speed.
i) Cut only one workpiece at a time. Stacked multiple workpieces cannot be adequately
clamped or braced and may bind on the blade or shift during cutting.
j) Ensure the mitre saw is mounted or placed on a level, firm work surface before use.
A level and firm work surface reduces the risk of the mitre saw becoming unstable.
k) Plan your work. Every time you change the bevel or mitre angle setting, make sure
the adjustable fence is set correctly to support the workpiece and will not interfere

with the blade or the guarding system. Without turning the tool “ON” and with no

workpiece on the table, move the saw blade through a complete simulated cut to assure

there will be no interference or danger of cutting the fence.

NOTE The phrase “bevel or” does not apply for saws without bevel adjustment.

l) Provide adequate support such as table extensions, saw horses, etc. for a

workpiece that is wider or longer than the table top. Workpieces longer or wider than

the mitre saw table can tip if not securely supported. If the cut-off piece or workpiece tips,
it can lift the lower guard or be thrown by the spinning blade.

m) Do not use another person as a substitute for a table extension or as additional

support. Unstable support for the workpiece can cause the blade to bind or the workpiece

to shift during the cutting operation pulling you and the helper into the spinning blade.
n) The cut-off piece must not be jammed or pressed by any means against the spinning
saw blade. If confined, i.e. using length stops, the cut-off piece could get wedged against
the blade and thrown violently.
o) Always use a clamp or a fixture designed to properly support round material such
as rods or tubing. Rods have a tendency to roll while being cut, causing the blade to
“bite” and pull the work with your hand into the blade.
p) Let the blade reach full speed before contacting the workpiece. This will reduce the
risk of the workpiece being thrown.
q) If the workpiece or blade becomes jammed, turn the mitre saw off. Wait for all
moving parts to stop and disconnect the plug from the power source and/or remove
the battery pack. Then work to free the jammed material. Continued sawing with a
jammed workpiece could cause loss of control or damage to the mitre saw.
r) After finishing the cut, release the switch, hold the saw head down and wait for the
blade to stop before removing the cut-off piece. Reaching with your hand near the
coasting blade is dangerous.
s) Hold the handle firmly when making an incomplete cut or when releasing the switch
before the saw head is completely in the down position. The braking action of the saw
may cause the saw head to be suddenly pulled downward, causing a risk of injury.
NOTE The above warning applies only for mitre saws with a brake system.
8.14.2 a)
Addition:
101) Instruction to identify the correct saw blade to be used for the material to be cut;
102) Information about cutting capacities;
103) Information about maximum bevel angle and mitre angle settings, as applicable;

104) Instruction to use only a saw blade diameter in accordance with the markings on the
saw and information about the bore diameter and the maximum kerf of the saw blade;
105) Instruction to use only saw blades that are marked with a speed equal or higher than
the speed marked on the tool;
106) Instructions for the saw blade changing procedure including proper saw blade direction
installation;
107) Instructions for adjusting the saw for proper cutting capacity, if applicable;
108) Instruction how to properly use the setting device(s) and the locking device(s) for the
saw blade depth-of-cut stop, mitre angle and bevel angle, as applicable;
109) Instruction how to align the fence, if applicable;
110) Instruction how to check that the saw blade guards are functioning correctly;
111) Instruction how to connect dust extraction systems;
112) For mitre saws with sliding function: Instruction for the cutting sequence;

– 12 – IEC 62841-3-9:2014 © IEC 2014

113) Instructions on how to set the depth of cut of the saw blade for non-through cuts, as

applicable;
114) Instruction to ensure that the mitre saw is always stable and secure (e.g. fixed to a

bench) and instruction how to fix the machine to a workbench or the like;

115) If adjustable and/or removable workpiece support extension(s) are provided to comply
with 21.102.1, instruction to always fix and use these extension(s) during operation;

116) Instruction to use additional supports if needed to ensure the stability of the workpiece.

8.14.2 b)
Addition:
101) Instruction on correct cutting operations, including cross cutting, mitre angle and
bevel angle cutting procedures, as applicable;
102) Instruction on simple non-through cutting operations such as grooving/slotting;
103) Information about which materials can be cut. Instructions to avoid overheating the
saw blade tips and, if cutting plastics is permitted, to avoid melting the plastic;
104) Instruction for proper use of the workpiece clamping device;
105) If the saw is provided with an interchangeable kerf plate: instructions how to remove
and install the kerf plate and how to adjust the kerf plate height with respect to the
table top, if applicable. Instruction to replace a worn kerf plate;
106) Instruction and the procedure to cut a slot in a zero clearance kerf plate, if applicable;
107) Instruction where to lift and support the mitre saw during transportation.
8.14.2 c)
Addition:
101) Instruction how to properly clean the tool and the guarding system.
9 Protection against access to live parts
This clause of Part 1 is applicable.
10 Starting
This clause of Part 1 is applicable.

11 Input and current
This clause of Part 1 is applicable.
12 Heating
This clause of Part 1 is applicable.
13 Resistance to heat and fire
This clause of Part 1 is applicable.

14 Moisture resistance
This clause of Part 1 is applicable.

15 Resistance to rusting
This clause of Part 1 is applicable.

16 Overload protection of transformers and associated circuits

This clause of Part 1 is applicable.
17 Endurance
This clause of Part 1 is applicable.
18 Abnormal operation
This clause of Part 1 is applicable, except as follows:
18.8 Replacement of table 4:
Table 4 – Required performance levels
Type and purpose of SCF Minimum Performance Level (PL)
Power switch – prevent unwanted switch-on Shall be evaluated using the fault conditions of 18.6.1
without the loss of this SCF
Power switch – provide desired switch-off Shall be evaluated using the fault conditions of 18.6.1
without the loss of this SCF
Provide desired direction of rotation Shall be evaluated using the fault conditions of 18.6.1
without the loss of this SCF
Any electronic control to pass the test of 18.3 c
Over-speed prevention to prevent output speed above c
130 % of rated (no-load) speed
Lock-off function as required by 21.18.2.101 b
Lower guard – prevent unwanted retraction or release c
of the locking device
Prevent exceeding thermal limits as in Clause 18 a

19 Mechanical hazards
This clause of Part 1 is applicable, except as follows.
19.1 Replacement of the first paragraph:
Moving and dangerous parts other than the rotating saw blade shall be so arranged or
enclosed that adequate protection against injury is provided. The guarding of the rotating
blade is covered in 19.101.
19.3 Replacement:
– 14 – IEC 62841-3-9:2014 © IEC 2014

It shall not be possible to reach hazardous moving parts through dust collection openings with

the detachable parts or provisions for dust collection removed, if any.

Compliance is checked by the following test.

For dust collection openings, the test probe B of IEC 61032 is used. The test probe is inserted

with a force not exceeding 5 N into the dust collection opening until the probe’s stop face

reaches the plane of the dust collection opening and shall not touch hazardous moving parts.

19.7.101 A mitre saw shall be constructed so that during foreseeable misuse operation it

will not tip over or move excessively.

Compliance is checked by tests 1 and test 2, if applicable. The test 2 applies only if the mitre
saw has a working stand either provided with the tool or specifically identified in accordance
with 8.14.2. For both tests, the mitre saw is set to 0° bevel angle and the test is conducted
at 0° and at maximum mitre angle settings. For mitre saws with a sliding action, the tests are
conducted with the saw unit at its maximum and at its minimum extended position from the
fence. If possible, the sliding mechanism is locked in the respective position. The tool is
assembled in accordance with 8.14.2 a) 2) and fitted with a 2 mm steel disc of diameter D.
1) The mitre saw, without a working stand and without being fixed to the supporting surface,
is placed on horizontal medium density fibreboard (MDF) having a density of
650 to 850 kg/m . An MDF workpiece of the same density as above, (20 ± 2) mm thick,
50 % of horizontal cutting capacity wide, a length equal to the length of the table top as
required in 21.102 and divided with a kerf to accommodate the saw blade, is positioned
against the fence and the saw unit is moved down to its fully down position, and then
the handle is released. The mitre saw shall not tip over.
2) The test is repeated with the mitre saw mounted to the working stand. The mitre
saw/working stand shall not tip over.
19.7.102 Mitre saws shall be provided with means to facilitate the fixing of the machine to a
bench, e.g. by providing holes in the base.
Compliance is checked by inspection.
19.101 Saw blade guards
19.101.1 To reduce the hazard of incidental contact with the saw blade the mitre saw shall
be provided with a combination of an upper guard and a lower guard.
– The upper guard shall cover the cutting edge zone and the periphery of the saw blade at
least in quadrants “A” and “B”. See Figure 102. The upper guard shall be fixed with

respect to the saw unit. To facilitate cutting a workpiece that is taller than the vertical
cutting capacity, the upper guard may incorporate a self-restoring workpiece-activated
section with a maximum opening angle of 30° in quadrant “A”. When the flange/clamping
nut is not circular it shall be covered by the upper guard.
NOTE Additional requirements for the self-restoring workpiece-activated section are specified in 19.101.9 and
19.102. Strength requirements in 20.1 for the upper guard also apply to the workpiece-activated section.
– When the saw unit is in the rest position, the lower guard shall be in its saw blade
covering position. Unless otherwise specified below, the lower guard in this position shall
guard the cutting edge zone and the periphery of a saw blade having a diameter D in
quadrants “C” and “D” that is not covered by the upper guard. See Figure 102. A
maximum of 30° exposure of the cutting edge zone and the periphery in quadrant “D” is
permissible, provided that the entire 30° exposure is located behind the plane of the fence
workpiece supporting surface when the saw unit is in the rest position.
The lower guard shall be self-restoring and be either:
• “link-activated” complying with the requirements of 19.101.2; or

• “workpiece-activated” complying with the requirements of 19.101.3; or

• “manually actuated” complying with the requirements of 19.101.4.

Compliance is checked by inspection and by measurement using a steel disc of diameter D in

place of the saw blade.
19.101.2 For the link-activated guard, the movement of the lower guard shall be linked with

or controlled by the motion of the saw unit. The down directed plunging action of the saw

unit’s motion shall cause the opening stroke of the lower guard. However, the lower guard

shall be free to open further independent of the link, provided this additional movement is self-

restoring.
Compliance is checked by inspection.
19.101.3 The workpiece-activated guard shall consist at least of two side barriers which, in
the rest position of the saw unit, cover both sides of the saw blade cutting edge zone not
covered by the upper guard. The workpiece-activated guard need not cover the periphery of
the saw blade. The edge of the side barriers shall extend beyond the periphery of the largest
recommended saw blade by at least twice the larger of the two side distances between the
plane of the saw blade and the inside surface of the side barrier, see distance ‘a’ as
illustrated in Figure 103. During the cutting action, the guard barriers shall open when they
make contact with the fence or the workpiece and shall remain in contact with the fence or
the workpiece.
The guard shall be automatically locked in the saw blade covering position as specified in
19.101.1 when the saw unit is in the rest position. The locking device shall be designed
such that the lower guard can be unlocked by either hand of the operator without releasing
the grasp on the handle.
Compliance is checked by inspection, by measurement using a 2 mm thick steel disc of
diameter D in place of the saw blade and, for the guard locking device, by test 2 of
21.18.2.101.
19.101.4 For the manual
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