ABRASIVE WHEELS

1
WELCOME
PORTABLE HANDHELD GRINDER AUTHORISATION TRAINING
2
INTRODUCTION

• Purpose
• To instruct personnel on the use and care of
  portable hand held grinders at Dungeness B
• Objectives
• To ensure candidates competence in the
  inspection, use and care of portable hand held
  grinders
• Format
• Slide show
• Practical observation (Optional)

3
WHY ARE WE HERE?
All guards, equipment handles and triggers
guards On power tools Must not be removed or
defeated
PUWER DNB/LSI/014/S021 Hot Work
4
Recent Events
5
Grinders
The Rules

• Side handle must be fitted.
• Kevlar sleeves must be worn - Stores code
  A862500
• Deadmans handle (No lock on option)
  
• Unplug it before you change discs.
• Put it down - Before repositioning yourself,
• wait until the disc has stopped, then place
• the grinder in safe position.
• All guards fitted and adjusted .

All rotating equipment and tools represent a
hazard. Be aware of the risks of entanglement,
abrasion, flying objects, noise and vibration and
ensure the hazards are appropriately controlled.
6
RELEVANT LEGISLATION

• Health and Safety at Work etc. Act 1974
• Management of Health of Safety at Work
  Regulations 1999
• Provision and Use of Work Equipment
  Regulations1998
• Noise at Work Regulations 1989
• Personal Protective Equipment Regulations1992

7
Provision and Use of Work Equipment (PUWER)
Regulation 9 Training

• Every employer shall ensure that all persons who
  use
• work equipment have received adequate training
  for the
• purposes of Health Safety, including training
  in the methods
• which may be adopted when using the work
  equipment, any
• risks which may entail and precautions taken.
• Note - This is not trade training persons on this
  session MUST be deemed as competent by their
  employers
• AS ABOVE for employees who supervise or manage
  the trade skill MUST confirm their competency as
  part of the setting to work process
• Young persons MUST be subject to a special RA
  before allowed to use a portable grinder

8
HASAWA 1974

• Section 7.
• It shall be the duty of every employee while at
  work to take reasonable care for the health and
  safety of himself and other persons who may be
  affected by his acts or omissions at work and to
  co-operate with his employer in order to enable
  statutory health and safety requirements to be
  complied with

9
TYPES OF WORK EQUIPMENT USING ABRASIVE WHEELS?
These items are not included Why
10
HAZARDS

• Coming into contact with moving parts of the
  equipment (including abrasive materials).
• Wheel/Disc bursting and material being ejected.
• Abrasive and small particles coming into contact
  with eyes.
• Noise from equipment.
• Vibration from equipment.
• Kickback where the grinder is thrust away from
  the work piece.
• Inhalation of fumes and dusts from materials
  being worked on.
• Entanglement with loose items drawing grinder to
  the operator
• Electrocution (PAT TESTING )

11
ACCIDENTS
Contact Injuries 60 Touching wheel, burns,
cuts, gashes, possible Amputations, inadvertent,
behavioural. These can be prevented by training
in the correct use. Eye Injuries 30 Caused by
lack of eye protection Must be impact 1grade
Goggles or Full face visor Grade 1B These
injuries can be prevented by wearing the correct
PPE and deploying the guard/deflector as trained
Burst Wheels 10 Various Causes, Manufacturing
defect ,incorrect use, behavioural, incorrect
disc for application of work .
12
RIGHT TOOL FOR THE TASK

• Is use of a portable angle grinder/cutter the
  right option for task.
• Has the grinder the following designed safety
  features?
• Soft start option (wherever possible)
• Deadmans handle (incorporating auto disconnect
  lock on facility). Deadmans handle is mandatory
  (If it comes with a lock on switch this must
  never be engaged by the user).
• Left and right hand operation as standard.
• If the answer is no to any of the above,
  consult Industrial Safety before proceeding

13
RIGHT TOOL FOR THE TASK

• Is the size of the unit correct for the task
  consider weight, ergonomic design, task position,
  extent of work, work periods, rest periods,
  restricted working space?
• Is the guard in place and set to correct
  position in good condition and secure?

14
HOT WORK
Grinding /cutting is classed as hot work and will
require a hot work certificate in accordance
with BEG/SPEC/SHE/CSI/042 Hot Work
15
Control Measures

• Guarding is provided to contain fragments of the
  wheel that might fly off if it did burst so
  preventing injury to the user and others in the
  workplace
• The guards secondary use is deflection of the
  debris and sparks away from the operator
• Operators suitably trained in the correct
  handling and mounting of abrasive wheels (This is
  for portable grinders only)
• Correct mounting will reduce the risk of
  bursting.

Guard Fitted
16
PERSONAL PROTECTIVE EQUIPMENT
Mandatory PPE requirement Kevlar Sleeves Wide
vision goggles, Offer eye protection and also
prevent dust and debris entering users eyes
or/and Full face visor as an alternative offers
full face protection but is not sealed against
dust and debris impact rated to BS grade 1 or
EN grade B Consideration should be given full
face fitted respiratory units or indirect vented
goggles to prevent dust ingress Heavy duty gloves
(Riggers leather) as a compromise is required
that allows user to hold and maneuver the grinder
during use Rated for mechanical protection EN
388 Abrasion rated 3 or greater Cut rated 4
or greater Tear 2 or greater Puncture 1 or
greater
17
PERSONAL PROTECTIVE EQUIPMENT

• A Kevlar fibre knitted sleeve with or without
  the cowhide split leather reinforcement on each
  arm
• Hearing defenders due to high noise levels
• Fire retardent workwear close fitting, no loose
  cords that may become entangled and draw the
  angle grinder/cutter into the user
• Long hair/jewellery - tied back/made secure
• Task risk assessment may require further
  protection-
• Hood to protect against particles been ejected
  or bounced back in restricted spaces
• Respirator when the material or coatings may be
  harmful to the operator
• Leather apron/jacket may offer protect to lower
  body and chest area (although may not be
  practical)

18
Grinders and use on Non ferous items

• Abrasive (grinding wheel) composition may be
  compromised by the heat generated by a "clogged"
  wheel. The heat is usually carried away from the
  wheel in the metal it removes, but a clogged
  wheel becomes a heat generator and the metal
  adhered to the wheel seals the heat in, therefore
  you could see a wheel explosion when the
  material is in contact with the wheel.
• Examples of material that will clog discs
• Copper
• Brass
• Aluminium
• Paint coatings
• Always select the right disc for the material to
  be worked on if in doubt refer to manufacturer

19
PERSONAL PROTECTIVE EQUIPMENT
Heavy duty rigger gloves are suitable the gloves
must be flexible so as not to compromise the
feel of the user
20
PERSONAL PROTECTIVE EQUIPMENT
The disposable dust mask will only give non
hazardous dust protection (Use a Non disposable
with correct filter attached for hazardous
material)
21
PERSONAL PROTECTIVE EQUIPMENT
Kevlar Leather sleeves Worn when using
grinders may be worn over or under overall
sleeves
Heavy duty gloves
22
PERSONAL PROTECTIVE EQUIPMENT
3M9925 / 8835
Impact grade 1B goggles
23
GUARDS

• All moving parts of work equipment must be
  suitably guarded.
• If adjustable guards are fitted they must always
  be adjusted prior to use and never removed.
• Check guard for cracks wear or other damage.
• Clean inside of guard before installing new
  wheel.
• Confirm the guard has been adjusted and locked.

24
GUARDS
Automatic Blade Guard - Portable Cut-Off Saw
Not covered under the requirements
25
GUARDS
Guard Fitted
26
GUARDS
No Guard can be fitted to this type of tool
therefore totally reliant on safe method of
operation and PPE worn. Not covered under these
requirements
27
GUARDS CONSEQUENCES OF NOT USING!!!!
Task Cut reinforcing bars from box-out in
concrete wall.
Unknown persons previously using the tool removed
an angle grinder guard.
The operative went to stores to collect an angle
grinder, the only one available had its guard
removed he took it anyway.
Work Equipment 4 Angle grinder fitted with
steel cutting disc.
Personnel Experienced General Labourer trained
in abrasive wheels.
The operative requested a new pair of gloves from
the stores but the expected delivery hadnt
arrived yet.
Instead of continuing to use the gloves he
already has the operative doesnt wear gloves
whilst carrying out the task.
Accident happens, and operative received injuries
which resulted in him losing sections of his
fingers and becoming disabled for the remainder
of his life.
28
REMEMBER USER INSPECTIONS
Portable Hand Held Grinders

• Inspect grinder housing to ensure no
  cracking/breakage
• Ensure that the cable is free from
  cracking/burning/broken sheath and that the plug
  is in good condition
• Must be 110 volts Pat Tested
• Discs inspected and in good condition (correct
  disc speed for grinder
• Second Handle fitted
• No exposed wires or lacerations on the cable

29
Practical Test

• The operators training history MUST be confirmed
  as having covered the use
• of portable angle grinders/cutters
• This session is an assessment not a training
  course.
• Competent assessor (List of requirement below)
• A selection of discs size/cutting/grinding
  /material specific/
• All specified mandatory PPE
• Grinder (Approved version)

30
Practical Test

• Under observation
• If a group session ask each person to do separate
  checks and others to comment
• Request operator to complete grinder inspection
  for obvious defects
• Once inspections are completed ask operator to
  don required PPE
• Request operator to adjust the guard on the
  grinder (Not plugged in)
• Request operator to change the disc on the
  grinder
• Request operator to place grinder down as per the
  design (On its back disc upwards)
• Discuss as group or an individual the session and
  any learning from it
• Ask for any further points missed from the
  session that would improve it

31
SUMMARY

• Abrasive wheels use is covered by the Provision
  and Use of Work Equipment Regulations 1998
• You must be trained and deemed competent.
• This training is not abrasive wheel training.
• You must wear the correct PPE
• Do not defeat safety devices (guards, side
  handle etc)
• If you are unsure, STOP and ask.

32
THANK YOU ANY QUESTIONS?