Download Safe Use of Grinders PDF

TitleSafe Use of Grinders
TagsMill (Grinding) Grinding (Abrasive Cutting) Tools Metalworking Labour
File Size90.6 KB
Total Pages13
Document Text Contents
Page 1

TARONG ENERGY CORPORATION LIMITED

CORPORATE BUSINESS PROCEDURE FOR

1997 Tarong Energy is a Registered Business Name of Tarong Energy Corporation Limited.

WRITTEN BY:.……......................................
NAME: T. Young

ENDORSED/CHECKED:........................................
NAME: J. Donovan

APPROVED BY:……………………………….…….
NAME: M. Joy

DATE:……………

Doc No: OHS-PROC-125 Revision No.: 1 Revision Date: 22.12.2010 Page: 1 of 13

THIS DOCUMENT IS UNCONTROLLED IN HARD COPY FORMAT




SAFE USE OF GRINDERS

OHS-PROC-125

Contents
1.0 Purpose................................................................................................................2
2.0 Scope...................................................................................................................2
3.0 Responsibilities ....................................................................................................2
4.0 Hazards................................................................................................................2
5.0 Risk Management ................................................................................................2
6.0 Controls................................................................................................................3

6.1 Substitution ......................................................................................................3
6.2 Safe Work Procedures .....................................................................................3
6.3 Instruction, Training and Supervision...............................................................3
6.4 Personal Protective Equipment........................................................................4

7.0 Safe Work Procedures.........................................................................................4
7.1 Correct Tool Selection......................................................................................4
7.2 Disc Safety .......................................................................................................4
7.3 Guarding ..........................................................................................................5
7.4 Operation Safety ..............................................................................................7
7.5 Cutting-Off Operations Safety ..........................................................................8
7.6 Bench Grinder Operation .................................................................................8
7.7 Wire Buffing......................................................................................................9
7.8 Kickback Prevention.......................................................................................10
7.9 Safety of Bystanders ......................................................................................10
7.10 Pre Use Checks .........................................................................................11
7.11 Hot Work Authorisation ..............................................................................11

8.0 Site Approved Angle Grinders ...........................................................................12
9.0 Environmental Requirements.............................................................................12
10.0 Definitions ......................................................................................................12
11.0 Reference Documentation .............................................................................13
12.0 Revision Timeframe .......................................................................................13
13.0 Revision History .............................................................................................13

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Doc No: OHS-PROC-125 Revision No.: 1 Revision Date: 22.12.2010 Page: 2 of 13





1.0 Purpose
The purpose of this document is to define the requirements for the safe use of

angle grinders.

2.0 Scope
This applies to all personnel who use angle grinders at TE operated sites.

3.0 Responsibilities
Manager
Operations

To allocate responsibilities and resources to ensure
effective site-specific implementation of this procedure.

Health and Safety
Manager

To maintain the currency and accuracy of this procedure
reflective of legislative and corporate change.

Line Managers and
Supervisors

To ensure workers under their supervision are aware of
their responsibilities under this procedure and comply with
relevant requirements.

Employees and
Contractors

To ensure that angle grinders are used in a safe manner
according to the requirements of this standard and
through knowledge gained through training and
instruction.

4.0 Hazards
Angle grinders are one of the most dangerous tools in any workplace. In all cases,
the hierarchy of controls should be applied in an effort to identify an alternative and
safer system of work where practicable. This is especially critical in the case of
large angle grinders.

Most angle grinder injuries are from metal particles lodging in the operator's eye.

However the most serious injuries are from kick-back, where the disc is thrust back
violently towards the operator. Injuries resulting from shattered grinding discs and
kickbacks are usually of a severe nature, requiring specific controls as outlined in
this procedure to minimise risk to an acceptable level.

The use of large angle grinders for cutting purposes should be avoided wherever
possible. A large angle grinder may only be use for cutting purposes following the
completion of form T-1559.

5.0 Risk Management
The use of angle grinders, in particular for cutting purposes, should be specifically
considered in the Job Safety and Environmental Analysis (JSEA) for the task, to
ensure risk associated with the work is at an acceptable level.

The following safety controls are to be applied at all times when using angle
grinders on site.

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Doc No: OHS-PROC-125 Revision No.: 1 Revision Date: 22.12.2010 Page: 6 of 13



7.3 Guarding (cont’d)

Bench Grinders

– It has been identified that a complete guard on a wire buff can be just as much
of a hazard as not having any guarding on at all. The risk of a full guard on a
wire buff is that small objects can be grabbed by the wire buff causing the
object to go into the guarding and be projected out directly at the operator. For
this reason Tarong Energy permits that the guarding on wire buffs be modified
to control all hazards associated with wire buff tasks. The following is an
example of an acceptable modification of a guard for a wire buff:



Please note that this guarding modification is for pedestal grinders with the
wire buff only.

– Bench grinders with normal grinding wheels attached are to be guarded as per
the manufacturers recommendation. Example displayed below:

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7.4 Operation Safety

– Allow the grinder to "run up" to operating speed before applying it to the job.

– Never bump the grinder on to the job, or let the disc hit any other object while
grinding.

– Keep the grinding disc at a 15 to 30 degree angle to the work.

– Make sure the work piece is held firmly in a bench vice, where necessary.

– Keep the work at waist height during grinding, where possible.

– Wherever possible, adopt a comfortable stance, with feet apart and well
balanced, and with a clear view of the job.

– When in cramped conditions, alternative tooling must be considered prior to
using a grinder.

– Never use a grinder between the legs while sitting on the floor.

– Stop the grinder at regular intervals for a short break to rest your hands and
arms.

– Disconnect the power and place the grinder on a bench with the disc facing
upwards when not in use.

– Remove the plug from the power point before changing discs.

– Position the power cord clear of the spinning accessory.

– Never lay the power tool down until the accessory has come to a complete
stop. The spinning accessory may grab the surface and pull the power tool out
of your control.

– Do not run the power tool while carrying it at your side. Accidental contact with
the spinning accessory could snag your clothing, pulling the accessory into
your body.

– Regularly clean the power tool’s air vents. The motor’s fan will draw the dust
inside the housing and excessive accumulation of powdered metal may cause
electrical hazards.

– Do not operate the power tool near flammable materials. Sparks could ignite
these materials.

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8.0 Site Approved Angle Grinders
Only angle grinders which meet the following specification shall be used. Persons
responsible for procuring angle grinders must ensure that the model purchased
meets the following criteria:

- Designed in accordance with AS/NZS 60745.2.3:2006 - Hand-held Motor-
operated Electric Tools—Safety. Part 2.3: Particular requirements for grinders,
polishers and disk-type sanders

- Angle grinders greater than 4.5 inch must have an automatic cut-off or
"deadman" switch as part of the hand grip.

- Must not have an override button or switch.

- Large angle grinders used for cutting purposes must include a torque limitation
clutch.

- Where possible, select models with adjustable handles that can be moved to
suit both left and right handed operators

Note: When considering the use of large angle grinders the responsible person
shall confirm that there is not a practical alternative work method available.

9.0 Environmental Requirements
Any environmental hazards associated with specific grinding tasks are to be
identified through an appropriate risk assessment. Controls for these identified
hazards will also be determined through the risk assessment.

10.0 Definitions
Angle
Grinder:

Tool with the rotating spindle at right angle to the motor shaft,
intended for peripheral and lateral grinding.

Competent
person:

A person who has acquired, through training, qualifications,
experience or a combination of these, the knowledge and skills
enabling the person to perform the specified task.


Control
measure:

The implementation of the hierarchy of control options to reduce
the risk to an acceptable level.


Large Angle
Grinder:

Any angle grinder in excess of 127 mm (5”). This includes all
180 mm (7”) and 230 mm (9”) angle grinders.

Deadman
Switch
(automatic
cut off
switch):

A switch when released by the operator, will cut the power to the
grinder instantly.

Rated
Capacity:

Maximum diameter of the rotating accessory to be fitted on the
tool as recommended by the manufacturer’s instruction.

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11.0 Reference Documentation
AS/NZS 60745.2.3:2006 - Hand-held Motor-operated Electric Tools—Safety. Part
2.3: Particular requirements for grinders, polishers and disk-type sanders

Government of Western Australia, Department of Commerce: Angle grinders in the
metal manufacturing industry (Dec 2007)

Queensland Government, Department of Employment and Industrial Relations.
Workplace Health and Safety Guidance Sheet – Metal product Manufacturing
Industry: Angle Grinders (January 2009)

Tarong Energy Procedure OHS-PROC-06 Safety Risk Management

Tarong Energy Procedure OHS-PROC-12 Personal Protective Equipment

12.0 Revision Timeframe

This document is required to be reviewed, as a minimum;

Every 3 years; or
As a result of any significant legislative or corporate change, or
As result of an audit



13.0 Revision History
Rev. No. Rev. Date Revision Description Written by Approved by

0 22.10.2009 Procedure Issued T. Young M. Joy

1 22.12.2010 Updated section 7.3 regarding guarding for
wire buff pedestal grinders

T. Young M. Joy

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