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paul-ps  
#1 Posted : 14 February 2012 12:29:54(UTC)
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paul-ps

How would you deal with the use of a large drill with its guard removed for trial purposes?
Ron Hunter  
#2 Posted : 14 February 2012 12:57:25(UTC)
Rank: Super forum user
Ron Hunter

replace the guard!
Safety Smurf  
#3 Posted : 14 February 2012 12:59:11(UTC)
Rank: Super forum user
Safety Smurf

Hi Paul, Can you give us some information? What is the nature of the trial? why does it need to be done with the guard removed?
paul-ps  
#4 Posted : 14 February 2012 15:10:26(UTC)
Rank: Forum user
paul-ps

Replacing the guard is not an option as the workpiece that is being trialled is to large. The industrial drill is operated from a control panel, with the operative some distance away from the rotational head and actual work area. The area is to be barried off with signs/limited access as the tooling runs. All trip hazards are to be removed/area made clear. Have I missed anything?
Safety Smurf  
#5 Posted : 14 February 2012 15:53:26(UTC)
Rank: Super forum user
Safety Smurf

A shattered tool won't stop for a sign. You need some form of physical shield between any people and the work.
Ron Hunter  
#6 Posted : 14 February 2012 16:26:16(UTC)
Rank: Super forum user
Ron Hunter

paul-ps wrote:
Have I missed anything?
Yes, the proper application of the hierachy of controls!
paul.skyrme  
#7 Posted : 14 February 2012 17:49:23(UTC)
Rank: Super forum user
paul.skyrme

Can we not apply a little proportionality to this? How many parts, how often, for how long? How big is the drill bit? How big is the part? Is this a Radial Arm Drill? Is the drill operating at low speed? Do you have competent operators? Is this an "Engineered" operation? How far would material be ejected if the drill were to fail? Remembering the stored energy of the particles ejected from the drill will be proportional to their mass and their rotational inertia. Why has the guard been removed, is it just due to the size of the part? Is this machine correct for the operation? There are millions of drilling operations done every day in the UK without chuck guards, if there were significant numbers of incidents then surely we would know about them. YES the cutting tool should be guarded as far as reasonably practicable. Loads of questions as usual from me, sorry!
Ron Hunter  
#8 Posted : 14 February 2012 22:47:04(UTC)
Rank: Super forum user
Ron Hunter

paul.skyrme wrote:
YES the cutting tool should be guarded as far as reasonably practicable./quote] PUWER imposes a higher practicable duty regarding the application of the hierachy (Reg 11). 'Reasonable Practicability' does not apply, and we cannot disregard statute simply because we're conducting a trial or experiment.
paul.skyrme  
#9 Posted : 14 February 2012 23:16:05(UTC)
Rank: Super forum user
paul.skyrme

Sorry ron, I disagree. IF there is little danger of injury from the "experiment" and the guarding is to cost in the region of £1M for a one off never to be repeated job, then I doubt that there would be any pressure to implement this guarding if the value of the work was around £10. The requirement to guard under PUWER98 would only be if accessible or able to cause injury. IF the spindle is not accessible then the operator cannot come into contact thus, the requirement for close guarding is irrelevant. If there is no possibility of ejected materials following tooling or work piece failure reaching the operator then the requirement for close guarding is again irrelevant. JUST because the close guarding has been removed, it does not mean that perimeter guarding cannot be applied and effective. Hence my questions for more information. I have seen MANY machines that are absolutely safe that do not have close spindle guarding and there is no danger what so ever to the operator.
JJ Prendergast  
#10 Posted : 15 February 2012 00:31:41(UTC)
Rank: Super forum user
JJ Prendergast

Follow Reg 11 of PUWER. I agree, Ron is legally correct.
paul-ps  
#11 Posted : 15 February 2012 08:03:25(UTC)
Rank: Forum user
paul-ps

This is a trial that could result in increased orders & jobs. The operatives taking part are skilled and reasonably practicable measures are being taken to ensure safe operation. To hit the avoid button & say no machine should be operated without its guard would limit development and growth of the company.
JJ Prendergast  
#12 Posted : 15 February 2012 08:15:59(UTC)
Rank: Super forum user
JJ Prendergast

The operatives taking part are skilled and reasonably practicable measures are being taken to ensure safe operation. To hit the avoid button & say no machine should be operated without its guard would limit development and growth of the company. Reg 11 of PUWER permits the consideration training/instruction of operators, but it is the last option in the hierarchy of controls given in Reg 11. You should follow the hierarchy of controls to the extent practicable. Guarding is not covered by the term 'reasonably practicable' but by the term 'practicable' - this is a higher legal duty. So while you comments are laudable regarding jobs and company growth, this does not out weigh your employers duties under Reg 11 PUWER. If you are unsure of how Reg 11 can be enforced, I would suggest you look up some machinery accidents on the HSE Prosecutions database. REG 11 (1) Every employer shall ensure that measures are taken in accordance with paragraph (2) which are effective – (a) to prevent access to any dangerous part of machinery or to any rotating stock-bar; or (b) to stop the movement of any dangerous part of machinery or rotating stock-bar before any part of a person enters a danger zone. (2) The measures required by paragraph (1) shall consist of – (a) the provision of fixed guards enclosing every dangerous part or rotating stock-bar where and to the extent that it is PRACTICABLE to do so, but where or to the extent that it is not, then (b) the provision of other guards or protection devices where and to the extent that it is PRACTICABLE to do so, but where or to the extent that it is not, then (c) the provision of jigs, holders, push-sticks or similar protection appliances used in conjunction with the machinery where and to the extent that it is PRACTICABLE to do so, and the provision of such information, instruction, training and supervision as is necessary.* Reg 9 covers training
walker  
#13 Posted : 15 February 2012 09:07:21(UTC)
Rank: Super forum user
walker

I really hate post responses that quote regs! I have in front of me a HSE publication HSG129, there is a picture of a radial arm drill - I see no guards You need to identify the risks. The drill is not a risk - its ejection, entanglement etc that are risks. Paul PS, use controls as you describe. Your proposals eg distance eliminates entangement seem to hit the spot Take into account Paul Skyrmes words As safety Smurf suggests a vision panel near the operative might be a good idea as even at low revs, ejection is possible if something shatters. Hope you win the order.
Lawlee45239  
#14 Posted : 15 February 2012 09:36:07(UTC)
Rank: Super forum user
Lawlee45239

walker wrote:
I really hate post responses that quote regs! I have in front of me a HSE publication HSG129, there is a picture of a radial arm drill - I see no guards You need to identify the risks. The drill is not a risk - its ejection, entanglement etc that are risks. Paul PS, use controls as you describe. Your proposals eg distance eliminates entangement seem to hit the spot Take into account Paul Skyrmes words As safety Smurf suggests a vision panel near the operative might be a good idea as even at low revs, ejection is possible if something shatters. Hope you win the order.
Oh I do agree with you, if we were to do everything to the 'T' as it say in legislation then nothing would be done anywhere, somethime we have to think about the situation and I fully agree that in this instance, it is controlled, therefore I go ahead with it.
JJ Prendergast  
#15 Posted : 15 February 2012 09:36:20(UTC)
Rank: Super forum user
JJ Prendergast

I hate quoting regs to - but sometimes its correct to do so. Without seeing the particular drill set up its hard to comment, I don't disagree with your view point about what the risk is. Nevertheless, machinery guarding is covered by Reg 11 of PUWER. There is no getting away from that. Safe by position/distance may well be the best solution while the drill is running. With temporary moveable screens if there is a need to 'take a closer look' while the drill is working. Safe shut down/isolation of the drill when tool changing etc if done manually. Thought it was important to put this task in the correct legal context, so the rules of the game are understood.
paul-ps  
#16 Posted : 15 February 2012 09:37:32(UTC)
Rank: Forum user
paul-ps

Many thanks for all your posts - it is always good to get your valued opinions and advice. Regards Paul.
chas  
#17 Posted : 15 February 2012 09:53:51(UTC)
Rank: Super forum user
chas

Whilst there is no guard fited to the drill illustrated in HSG129 there is a vertical trip bar fitted. So to suggest that no level of chuck/spindle/bit protection is necessary may be a bit misleading. 'Safe by position' for a one off test may be Ok if managed carefully but not, in my view, for longer term production. Reference to HSE publication PM83 may be of use.
paul-ps  
#18 Posted : 15 February 2012 10:06:16(UTC)
Rank: Forum user
paul-ps

This is a trial run only. For normal production, full fixed guards would be fitted as standard.
Ron Hunter  
#19 Posted : 15 February 2012 10:31:24(UTC)
Rank: Super forum user
Ron Hunter

QUOTE "This is a trial run only. For normal production, full fixed guards would be fitted as standard." QUOTE. My point exactly, Paul-ps. This machine has a guard. That guard has been purposefully removed. There is therefore no room for debate on the application of PUWER Reg 11. To turn this round a bit - if the worst were to happen, how would your Organisation propose to defend itself?
JJ Prendergast  
#20 Posted : 15 February 2012 10:55:13(UTC)
Rank: Super forum user
JJ Prendergast

Well said Ron - correct. If it is 'practicable' to guard the drill with fixed guards once in normal production, then it is 'practicable' to do so in a trial situation. Paul-ps - you have defeated your own argument, I think. Can't remember the full definition - but 'practicable' means to the 'extent technically possible'
walker  
#21 Posted : 15 February 2012 11:03:48(UTC)
Rank: Super forum user
walker

ron hunter wrote:
QUOTE "This is a trial run only. For normal production, full fixed guards would be fitted as standard." QUOTE. My point exactly, Paul-ps. This machine has a guard. That guard has been purposefully removed. There is therefore no room for debate on the application of PUWER Reg 11. To turn this round a bit - if the worst were to happen, how would your Organisation propose to defend itself?
Ron, My understanding was that the current guard interfered with the task and that a suitable guard would be procured (maybe at some expense) if the contract was won. Paul PS, To quote regs ;-) REG 11 (1) Every employer shall ensure that measures are taken in accordance with paragraph (2) which are effective – (a) to prevent access to any dangerous part of machinery or to any rotating stock-bar; or (b) to stop the movement of any dangerous part of machinery or rotating stock-bar before any part of a person enters a danger zone. You are using distance and hopefully a see through barrier to satisfy the above Essentially your guarding (of a mixed nature) is enclosing the person, so I see no regs breaches
paul-ps  
#22 Posted : 15 February 2012 11:08:54(UTC)
Rank: Forum user
paul-ps

The guard that the machine currently has fully encloses the work area. This is a very expensive & new machine with a skill operator, not a bench mounted pillar drill with a plastic guard. The size of the trial workpiece is larger than the current full length guards can enclose. Additional guards would be manufactured at a cost of ££££? should the trial be a success. We need to run manufacturing trials to win orders, to keep 500+ in a job. In the real world not every task can have ££££££ thrown at it, where sensible risk reduction will be sufficent.
Ron Hunter  
#23 Posted : 15 February 2012 11:22:41(UTC)
Rank: Super forum user
Ron Hunter

The manufacturer of that machine added that guard to ensure compliance with Machinery Regs/Directive. This duty essentially translates via PUWER to the employer operating the machine. The persons removing that guard /those authorising the removal are in breach if they then permit that machine to be used. Reg 11(1) is quoted here by others without the added context of 11(2). A significant risk is being taken by those concerned. No amount of debate on this Forum will add justification to that if things go wrong. If things do go wrong, the realities of the 'real world' and proper context of sensible risk reduction will become quickly apparent. Yes, we all want to keep people in jobs. In your case it's 500 people. I do hope that doesn't become 499 or 498. I'll leave it there.
paul-ps  
#24 Posted : 15 February 2012 11:30:53(UTC)
Rank: Forum user
paul-ps

Ron - I'm interested - What would your solution be? Regards Paul.
Safety Smurf  
#25 Posted : 15 February 2012 11:45:46(UTC)
Rank: Super forum user
Safety Smurf

Paul. As I understand it, the "guard" as it is being refered to is actually a cabinet enclosure and that cabinet isn't big enough. Is that correct?
SP900308  
#26 Posted : 15 February 2012 11:49:24(UTC)
Rank: Super forum user
SP900308

Paul, For the trial, can the piece not be done in two halves? Simon
walker  
#27 Posted : 15 February 2012 11:52:41(UTC)
Rank: Super forum user
walker

Ron, I'm guessing that Paul inhabits the same world me. None of the guarding on our machines was fitted by the manufacturer Users have to adapt machinery Users are required to ensure those adaptations are suitable & sufficent. Meet PUWER & Machinery Directives Sometime this has to happen in phases but with a little thought that does not mean safety gets compromised Paul & his employers appear to me to be diligent and concerned with the well being of their staff. The alternative is the order is won by a cowboy
TomDoyle  
#28 Posted : 15 February 2012 11:53:23(UTC)
Rank: Forum user
TomDoyle

Assuming that a risk assessment has been completed, the risk controls would have included the guard among other things. With the guard and other things in place, the RA should have resulted in some resultant degree of risk. If you go back to your RA and remove the guard from the set of risk controls, you should end up with a different resultant risk. (If you don't end up with a different resultant level of risk then clearly there is an issue with the RA process) The questions to be answered are: Can the organization and the workers tolerate new resultant risk? In the event that an injury occurs would the organization be able to stand behind its decision to remove the guard and then use the equipment? Interesting discussion. Cheers, Tom
Whites  
#29 Posted : 15 February 2012 12:16:11(UTC)
Rank: New forum user
Whites

Hi I'm quite new to all this, so apologies if I'm way off the mark but have you spoken to the manufacturer of the drill because it sounds like the drill has not been designed for this type of work, they might be able to shed some light on how to resolve this situation. I would like to think that by addressing the risks that are controlled usually by the guarding on the drill in another manor as to control the risks suitably, i.e. Shielding etc that the trials can be done safely, however part of me knows that should an accident occur during the trials the invesigation would more than likely state that the guarding was installed and should be used at all times and that work requiring the removal of the guard is outside of the drills design and should not have been carried out. Unfortunately the world is not always fair. Cheers, Paul
JJ Prendergast  
#30 Posted : 15 February 2012 12:31:16(UTC)
Rank: Super forum user
JJ Prendergast

PUWER doesn't stop you 'boxing' the operator in (for want of a better way of describing it - I appreciate this isn't what happens in practice) The point is you prevent access to the dangerous parts of the machine while in operation. See Reg 11 item 1(b) Non uncontontrolled general access to the work environment. Safe shut down and isolation, when access is required. It should be straigh forward enough to do and still comply with PUWER Reg 11.
SP900308  
#31 Posted : 15 February 2012 12:39:47(UTC)
Rank: Super forum user
SP900308

Paul, Another option could be to contract another engineering firm (if they can accommodate the piece in their enclosure) to run the test piece for you? This maybe impractical if a sensitive design, difficult to find equipment capable of taking the piece? Just a thought!
Ron Hunter  
#32 Posted : 15 February 2012 13:44:15(UTC)
Rank: Super forum user
Ron Hunter

paul-ps wrote:
Ron - I'm interested - What would your solution be? Regards Paul.
In the first instance, contact the manufacturer of the machine. You say it's fairly new, that shouldn't be a problem.
paul-ps  
#33 Posted : 15 February 2012 14:39:02(UTC)
Rank: Forum user
paul-ps

And that would no doubt, lead to them flying into action to design and produce a one off solution, just for our trial at a cost of ££££'s & a lead time of how many months. BACK IN THE REAL WORLD.
walker  
#34 Posted : 15 February 2012 14:43:16(UTC)
Rank: Super forum user
walker

"You say it's fairly new, that shouldn't be a problem.2 Well in my experience it will be a problem. Machines now come from the far east, ex iron curtain and a few from Italy. They are all CE marked & lots of pretty paperwork but without exception ( the ones I've examined) are substandard with regard to safety devices. I'm not trying to have a brag but I have 20 years experience getting equipment certified through CE /Euronorms/ IEC /BS / CSA etc so I do have an inkling at what I'm talking about
paul.skyrme  
#35 Posted : 15 February 2012 17:52:06(UTC)
Rank: Super forum user
paul.skyrme

Amen to the comments by walker! To turn the "reasonably practicable" and "practicable" situation on its head. For this trial it is not "practicable" to fit fully enclosing guards to the machine, so other options need to be sought. As long as the operator & others are protected from the process and its associated hazards, then this requirement if fulfilled. Remote screens that permit this I feel would be wholly acceptable. To do so without ANY protection would not be acceptable. If the work piece is "that" big it is not going to spin off the table if a 5mm dia hole is being drilled in it, however, the drill could break, if it is having a 75mm hole drilled in it, perhaps it could move, and it also could break the drill. There is a little more to this than meets the eye (internet forum) ;) really.
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