IEC 60745-2-3:2006/AMD2:2012

IEC 60745-2-3 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Hand-held motor-operated electric tools – Safety –
Part 2-3: Particular requirements for grinders, polishers and disk-type sanders

Outils électroportatifs à moteur – Sécurité –
Partie 2-3: Règles particulières pour les meuleuses, lustreuses et ponceuses du
type à disque
IEC 60745-2-3:2006/A2:2012
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IEC 60745-2-3 ®
Edition 2.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Hand-held motor-operated electric tools – Safety –

Part 2-3: Particular requirements for grinders, polishers and disk-type sanders

Outils électroportatifs à moteur – Sécurité –

Partie 2-3: Règles particulières pour les meuleuses, lustreuses et ponceuses du

type à disque
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
G
CODE PRIX
ICS 25.140.20 ISBN 978-2-83220-143-5

– 2 – 60745-2-3 Amend. 2 © IEC:2012
FOREWORD
This amendment has been prepared IEC technical committee 116: Safety of motor-operated
electric tools.
The text of this amendment is based on the following documents:
FDIS Report on voting
116/89/FDIS 116/95/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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• withdrawn,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.
_____________
1 Scope
Add the following new paragraph to the existing text:
This standard does not apply to die grinders utilizing collets or chucks for mounting threaded
cones and mandrel mounted wheels which are covered by IEC 60745-2-23.
2 Normative references
Delete the fourth normative reference ANSI B7.1.
Add the following new normative reference:
ANSI B74.2:2003, Specifications for Shapes and Sizes of Grinding Wheels, and for Shapes,
Sizes and Identification of Mounted Wheels
3 Terms and definitions
Replace the existing definitions 3.104.2, 3.104.3 and 3.105 by the following:
3.104.2
straight grinder
tool with the rotating spindle in-line with the motor shaft, equipped with an abrasive wheel
intended for peripheral grinding, but not equipped with a collet or chuck

60745-2-3 Amend. 2 © IEC:2012 – 3 –
3.104.3
vertical grinder
tool with the rotating spindle in-line with the motor shaft, intended for peripheral and lateral
grinding
3.105
threaded wheels
organic or inorganic bonded abrasives of various types provided with a threaded insert for
direct mounting to the grinder spindle
Replace the existing definition 3.110 by the following:
3.110
wheel types
wheels for different applications in accordance with ISO 603-12, ISO 603-14, ISO 603-16 or
ANSI B 74.2
8 Marking and instructions
8.12.1.101 Safety instructions for all operations
Add the following note to item a):
NOTE List only those operations that are recommended.
Replace the existing item f) by the following:
f) Threaded mounting of accessories must match the grinder spindle thread. For
accessories mounted by flanges, the arbour hole of the accessory must fit the
locating diameter of the flange. Accessories that do not match the mounting hardware
of the power tool will run out of balance, vibrate excessively and may cause loss of
control.
8.12.1.103 Additional safety instructions for grinding and cutting-off operations
Add the following new safety warning b) after item a) and renumber the subsequent safety
warnings:
b) The grinding surface of centre depressed wheels must be mounted below the plane
of the guard lip. An improperly mounted wheel that projects through the plane of the
guard lip cannot be adequately protected.
8.12.2 b)
Replace the existing items 101) to 104), 106) and 107) by the following:
101) Instruction on the proper use of blotters, when they are provided with the bonded
abrasive product
102) Information about the specific flanges to be used with all wheel types in accordance
with 8.12.2 a) 101). Instruction on the mounting of accessories and the use of the
correct flanges. For reversible flanges, instruction on the correct method of fitting the
flanges
103) For all wheels specified in accordance with 8.12.2 a) 101), instruction on their proper
use. For grinding and cut-off wheels, instruction on their use for side grinding and
peripheral grinding applications, and for Type 27 and 28 wheels, the recommended
angle to the work surface
– 4 – 60745-2-3 Amend. 2 © IEC:2012
104) For all operations listed in accordance with 8.12.1.101 a), where the use of a guard is
required, instruction for the proper type of guard to be used
106) Instruction on proper support for the workpiece
107) In case of cup-wheels, cones or plugs with a threaded hole intended to be mounted on
the machine spindle, critical dimensions and other data shall be given in order to
prevent the spindle end from touching the bottom of the mounting hole of the abrasive
product
19 Mechanical hazards
19.101
Replace the existing first paragraph, dashed text not included, by the following:
Grinders with a rated capacity exceeding 55 mm shall be provided with at least one wheel
guard to protect the user during normal use against:
Replace the existing second paragraph, dashed text not included, by the following:
If the tool is supplied with one or more accessories, the wheel guard(s) supplied shall be
appropriate for the supplied accessory(ies). The wheel guard (hereafter referred to as a guard)
may be removable either with the aid of a tool or by fulfilling the following requirements:
Replace the existing third paragraph by the following:
The guard shall also fulfil the following requirements:
– be designed so that, in case of a wheel burst, the guard reduces the risk of injury to the
operator, remains attached to the grinder by effective and secure means and complies
with the test of 20.101;
– facilitate the change of the abrasive wheel without the need to remove the guard;
– be designed so that the risk of an accidental contact between the operator and the wheel
during normal use is minimized e.g. by a possibility of adjustment.
Replace the existing fourth paragraph by the following:
To prevent the installation of an oversized wheel, the clearance between the inside of the
guard and the periphery of a new abrasive product in accordance with 8.12.2 a) 101) shall, in
at least one location, be 8 mm maximum for tools with a rated capacity not exceeding 130 mm
and 10 mm maximum for tools with a rated capacity exceeding 130 mm.
th
Replace the existing 6 paragraph by the following:
For wheel Types 27, 28 and 29, the guard shall cover the abrasive wheel periphery and the
backing flange side for at least 175°. The guard periphery shall have a lip on the outer edge
that curls inward for at least 3 mm from the intersect line of the top surface of the thickest
wheel and largest wheel diameter, as specified in accordance with 8.12.2 a) 102), with the
inner surface of the guard to the inner edge of the lip, measured radially. The face of the
thickest recommended wheel shall be at least 2 mm axially from the inner surface of the lip.
The ends of the lip protruding the thickest recommended wheel may be chamfered by not
more than 45°. See Figure 102.
th
Delete the 8 paragraph, starting with "The face of the thickest recommended wheel…".

60745-2-3 Amend. 2 © IEC:2012 – 5 –
Replace the existing compliance paragraph by the following:
Compliance is checked by inspection and by measurement. The guard coverage angle is
measured with the vertex at the centre of the spindle and extended to the guard periphery.
19.102
nd rd
Replace the existing 2 and 3 paragraphs by the following:
Grinders shall be provided with at least backing flange(s) and locking flange(s) for mounting
the type of grinding wheels that are intended to be used with the guard supplied with the
grinder. The flanges shall meet the requirements of 19.104 and 19.105.
Flanges are not required with the following designs:
• non-reusable plate mount or threaded nut affixed to the wheel by the manufacturer;
• threaded hole or modified cup wheels.
19.103
nd
Replace the existing 2 paragraph by the following:
The direction of spindle threads or the design of an equivalent securing means shall be such
that any clamping device or wheel with threaded hole tends to tighten during working.
nd
Replace the existing 2 compliance paragraph by the following:
Compliance is checked by measurement. The eccentricity is measured as the difference
between the minimum and the maximum reading of the indicator.
Delete the last paragraph.
19.104
Add, after the third paragraph, the following new text:
If the clamping surface of the locking flange is chamfered, the bevel angle, measured from the
clamping surface, shall be at least 45° and the non clamping surface outside diameter of the
flange may be increased by not more than 4 mm.
19.104.1
nd
Replace the existing 2 paragraph by the following:
For wheel Type 41, the D dimension may exceed the above values for backing and locking
f
flanges. For all other wheel types, the diameter D may exceed the above values for backing
f
flanges only.
Add, at the end of 19.104.1, the following new Note:
NOTE In the United States of America, the following conditions apply:
The flange dimensions for wheel Type 1 that are thicker than 5 mm shall be:
D ≥ 0,33 D
f
The flange diameter for wheels Type 1 that are 5 mm and thinner and Types, 6, 11, 27, 28, 29, 41, and 42 (27A)
shall be:
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