FACTORIES AND INDUSTRIAL UNDERTAKINGS (ABRASIVE WHEELS) REGULATIONS

FACTORIES AND INDUSTRIAL UNDERTAKINGS (ABRASIVE WHEELS) REGULATIONS

FACTORIES AND INDUSTRIAL UNDERTAKINGS
(ABRASIVE WHEELS) REGULATIONS

ARRANGEMENT OF REGULATIONS

Regulation Page

PART I

PRELIMINARY

1. Citation ................................. ... ... ... ... ... ... L 2
2. Interpretation............................ ... ... ... ... ... ... ... L 2
3. Application .............................. ... ... ... ... ... ... L 3
4. Exceptions ............................... ... ... ... ... ... ... L 3

PART II

DUTIES OF
PROPRIETORS

5. Speeds of abrasive wheels ............. ... ... ... ... ... ... L 3

6. Speeds of spindles ....................... ... ... ... ... ... ... L 4

7. Mounting ................................. ... ... ... ... ... ... L 5

8. Provision of guards ................... ... ... ... ... ... ... ... L 5

9. Construction, maintenance, etc. of guards ... ... ... ... ... ... L 5

10.......................Tapered wheels and protection flanges ... ... ... ... ... ... ... L 5

11. Selection of abrasive wheels ... ... ... ... ... ... ... ... ... ... L 6

12. Machine controls................ ... ... ... ... ... ... ... ... ... L 6

13.......Rest ................................ ... ... ... ... ... ... ... L 6

14............Warning notice ................. ... ... ... ... ... ... ... ... L 6
15............Condition of floors............. ... ... ... ... ... ... ... ... ... L 6

PART III

DUTIES OF PERSONS
EMPLOYED

16..................Responsibilities of employees ... ... ... ... ... ... ... ... ... L 7

PARTIV

OFFENCES AND
PENALTIES

17. Offrnces and penalties ... ... ... ... ... ... ... ...





FACTORIES AND INDUSTRIAL UNDERTAKINGS
(ABRASIVE WHEELS) REGULATIONS

(Cap. 59, section 7)

[1st January, 1976.1

PART 1
PRELIMINARY
1. These regulations may be cited as the Factories and
Industrial Undertakings (Abrasive Wheels) Regulations.

2. In these regulations, unless the context otherwise requires-

'abrasive wheel' means-
(a) a wheel, cylinder, disc or cone which consists wholly or
partly of abrasive particles held together by mineral,
metallic or organic bonds whether natural or artificial;
(b) a-
(i) mounted wheel or point; or
(ii) wheel or disc, having separate segments of abrasive
material;
(c) a wheel or disc-
(i) made of metal, wood or rubber; and
(ii) having any surface consisting wholly or partly of
abrasive material; and
(d) a wheel, disc or saw to any surface of which, in each case,
is attached a rim or segments consisting of diamond
abrasive particles,
and which is, or is intended to be, power driven and which is
for use in any grinding or cutting operation;

,,employee' means a person who in an industrial undertaking is
employed in using any abrasive wheel in any grinding or cutting
operation;
mounted wheel or point' means a wheel or point consisting in
either case of abrasive particles held together by mineral,
metallic or organic bonds whether natural or artificial and
securely and permanently mounted on the end of a mandrel
or quill;
overhang', in relation to a mounted wheel or point, means that
part of the mandrel or quill which is exposed between the collet
in which the mandrel or quill is held and the part of the abrasive
material nearest to that collet.





3. Subject to regulation 4, these regulations shall apply to any
abrasive wheel used for any grinding or cutting operation in any
industrial undertaking.

4. (1) Regulations 5, 6, 9(a) and (b) and 10 shall not apply to any
abrasive wheel manufactured of metal, wood or rubber and having any
surface consisting wholly or partly of abrasive material.

(2) Regulations 9(a) and (b) and 10 shall not apply to any abrasive
wheel which consists wholly of abrasive particles held together by
natural bonds.

(3) Regulation 5 shall not apply to any abrasive wheel having
separate segments of abrasive material.

(4) Regulations 5, 6, 8(1), 9 and 10 shall not apply to any abrasive
wheel which

(i) does not exceed 235 millimetres in diameter;

(ii) is manufactured of rubber; and

(iii) has any surface consisting wholly or partly of abrasive
material,

when that abrasive wheel is used in a portable machine.

(5) Regulations 6, 8(1), 9 and 10 shall not apply to any abrasive
wheel when it is used for the grinding of glass.

(6) Regulations 5, 6 and 10 shall not apply to any wheel, disc or saw
to any surface of which, in each case, is attached a rim or segments
consisting of diamond abrasive particles.

PART II

DUTIES OF PROPRIETORS

5. (1) No abrasive wheel having a diameter of more than 55
millimetres shall be taken into use in any industrial undertaking for the
first time in that industrial undertaking after the coming into operation of
these regulations unless the abrasive wheel or its washer is clearly
marked, in English or Chinese, with the maximum permissible speed in
revolutions per minute specified by the manufacturer of that wheel.

(2) No abrasive wheel having a diameter of 55 millimetres or less
shall be taken into use in any industrial undertaking for the first time in
that industrial undertaking after the coming into operation of these
regulations unless there is kept permanently fixed in the room in which
grinding is ordinarily carried out with that wheel a notice, in English and
Chinese, stating the maximum permissible speed in revolutions per
minute specified by the manufacturer for that abrasive wheel or for
abrasive wheels of the class to which that abrasive wheel belongs and,
in the case of mounted wheels and points, the overhang permissible at
that speed:





Provided that when grinding with such an abrasive wheel is not
ordinarily carried out in any one room the notice shall be kept posted at
a place and in a position where it may easily be read by employees
employed in grinding with that abrasive wheel.

(3) No abrasive wheel shall be operated at a speed in excess of the
maximum permissible speed in revolutions per minute specified under
this regulation for that wheel:

Provided that where the diameter of an abrasive wheel has been
reduced its said maximum permissible speed may be increased to that
speed which bears the same proportion to the said maximum permissible
speed as the original diameter of the abrasive wheel bears to its reduced
diameter.

6. (1) There shall be securely affixed to every power driven machine
having any spindle on which an abrasive wheel is, or is intended to be,
mounted a notice, in English and Chinese, specifying

(a)in the case of each such spindle (other than a spindle to which
sub-paragraph (b) or (c) applies), its maximum working speed;

(b)in the case of any such spindle for which there are provided
arrangements for operating the spindle at more than one
specific working speed, each specific speed; and

(c)in the case of any such spindle for which there are provided
arrangements for operating the spindle at an infinite number of
working speeds within a specified range, the maximum and
minimum working speeds of the spindle.

(2) No spindle shall, while an abrasive wheel is mounted on it, be
operated at a speed in excess of the maximum working speed specified
under this regulation for that spindle.

(3) The proprictor of an industrial undertaking shall, when so
required by an inspector, provide the inspector with all such facilities
and information as are necessary to enable him to determine the working
speed of any spindle, shaft, pulley or other appliance which is used to
operate an abrasive wheel.

(4) The speed of every air driven spindle on which an abrasive
wheel is mounted shall be controlled by a governor or other device so
that the speed of the spindle does not at any time exceed the maximum
working speed specified for that spindle in accordance with paragraph
(1).

(5) Every governor and other device used for controlling the speed
of an air driven spindle on which an abrasive wheel is mounted shall be
properly maintained.





7. (1) Every abrasive wheel shall be properly mounted.

(2) An abrasive wheel shall not be mounted except by a person
who

(a)has been appointed in writing for that purpose by the
proprietor of an industrial undertaking; and

(b)is, by reason of training and practical experience, competent to
perform that operation.

8. (1) Except as provided in paragraph (2), a guard shall be provided
and kept in position at every abrasive wheel in motion.

(2) Paragraph (1) shall not apply to an abrasive wheel where, by
reason of the work being done, or of the work which is ordinarily done
(or, in the case of a new wheel, is intended ordinarily to be done), or the
nature of the wheel, the use of a guard is impracticable.

9. Every guard provided in pursuance of these regulations shall

(a)so far as is reasonably practicable, be of such design and
construction as to contain every part of the abrasive wheel in
the event of fracture of the abrasive wheel or any part thereof
occurring while the abrasive wheel is in motion;

(b)be properly maintained and so secured as to prevent its
displacement in the event of fracture; and

(c)enclose the whole of the abrasive wheel except such part as is
necessarily exposed for the purpose of work being done at
that abrasive wheel or, where a guard which is not adjustable
is used, for the purpose of the work which is ordinarily done
thereat (or, in the case of a new abrasive wheel, is intended
ordinarily to be done thereat).

10. (1) Where the work which is ordinarily done (or, in the case of a
new abrasive wheel, is intended ordinarily to be done) at any abrasive
wheel requires that the exposed area of the wheel shall exceed 180
degrees measured at the centre of the wheel then, where practicable, the
wheel shall be tapered from its centre towards its periphery by at least 6
per cent on each side and shall be mounted between suitable protection
flanges.

(2) Protection flanges between which any abrasive wheel is
mounted in accordance with paragraph (1) shall be of substantial
construction and properly maintained and shall have the same degree of
taper as the wheel and shall

(a)in the case of a wheel of 300 millimetres or less in diameter, be
of a diameter equal to at least half the diameter of the wheel;





(b)in the case of a wheel of more than 300 millimetres but not
exceeding 750 millimetres in diameter, be of a diameter equal to
at least the diameter of the wheel less 150 millimetres; and

(c)in the case of a wheel of more than 750 millimetres in diameter,
be of a diameter equal to at least the diameter of the wheel less
200 millimetres.

11. All practicable steps shall be taken to ensure that any abrasive
wheel used is suitable for the work for which it is used to the extent
necessary to reduce the risk of injury to employees.

12. No abrasive wheel shall be used in a machine unless the
machine is provided with an efficient device for starting and cutting off
the power to the machine and the control of the device shall be in such a
position and of such design and construction as to be readily and
conveniently operated by the person operating the machine.

13. (1) Where at an abrasive wheel there is a rest for supporting a
workpiece that rest shall at all times while the wheel is in motion be
properly secured and adjusted so as to be as close as practicable to the
exposed part of the abrasive wheel.

(2) Every rest shall be of substantial construction and properly
maintained. A

14. A warning notice, in English and Chinese and in a form
approved by the Commissioner, concerning the dangers arising from the
use of abrasive wheels and the precautions to be observed shall be
affixed in every room in which grinding or cutting by means of abrasive
wheels is ordinarily carried out, or, where such grinding or cutting is not
ordinarily carried out in a room, at a place and in such a position where it
may be easily read by employees.

15. (1) The floor immediately surrounding every fixed machine on
which an abrasive wheel is, or is intended to be, mounted shall be
maintained in good and even condition and shall, so far as practicable,
be kept clear of loose material and prevented from becoming slippery.

(2) All reasonably practicable steps shall be taken to ensure that
the floor of any room or place in which any portable machine on which
an abrasive wheel is mounted is in good and even condition, is kept
clear of loose material and is prevented from becoming slippery.





PART III

DUTIES OF PERSONS EMPLOYED

16. (1) No employee shall wilfully misuse or remove any guard, or
wilfully misuse any protection flange, machine control, governor or
other device provided in pursuance of these regulations or any rest for a
workpiece.

(2) Every employee shall make full and proper use of guards,
protection flanges, machine controls, governors and other devices
provided in pursuance of these regulations and of rests for workpieces
and if he discovers any defect in the same shall forthwith report such
defect to the proprietor.

PART IV

OFFENCES AND PENALTIES

17. (1) The proprietor of any industrial undertaking in respect of
which any of the provisions of regulation 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or
15 are contravened shall be guilty of an offence and shall be liable
on conviction to a fine of $5,000

(2) Any employee who contravenes any of the provisions of
regulation 16 shall be guilty of an offence and shall be liable on
conviction to a fine $1,000.
L.N. 103/75. Citation. Interpretation. Application. Exceptions. Speeds of abrasive wheels. Speeds of spindles. Mounting. Provision of guards. Construction, maintenance, etc., of guards. Tapered wheels and protection flanges. Selection of abrasive wheels. Machine controls. Rest. Warning notice. Condition of floors. Responsibilities of employees. Offences and penalties.

L.N. 103/75. Citation. Interpretation. Application. Exceptions. Speeds of abrasive wheels. Speeds of spindles. Mounting. Provision of guards. Construction, maintenance, etc., of guards. Tapered wheels and protection flanges. Selection of abrasive wheels. Machine controls. Rest. Warning notice. Condition of floors. Responsibilities of employees. Offences and penalties.

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