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)
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
Grinders The Rules • Side handle must be fitted. • Kevlar sleeves must be worn - Stores code A862500 • Deadman’s 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.
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
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
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
TYPES OF WORK EQUIPMENT USING ABRASIVE WHEELS? These items are not included Why
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 )
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 .
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) • Deadman’s handle (incorporating auto disconnect lock on facility). Deadman’s 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
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?
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
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
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
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)
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
PERSONAL PROTECTIVE EQUIPMENT Heavy duty rigger gloves are suitable the gloves must be flexible so as not to compromise the feel of the user
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)
PERSONAL PROTECTIVE EQUIPMENT Kevlar & Leather sleeves Worn when using grinders may be worn over or under overall sleeves Heavy duty gloves
PERSONAL PROTECTIVE EQUIPMENT 3M9925 / 8835 Impact grade 1B goggles
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.
GUARDS Automatic Blade Guard - Portable Cut-Off Saw Not covered under the requirements
GUARDS Guard Fitted
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
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 hadn’t arrived yet. Instead of continuing to use the gloves he already has the operative doesn’t 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.
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
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)
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
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.
THANK YOU ANY QUESTIONS?