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#1 Posted : 09 February 2009 14:11:00(UTC)
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Posted By Seamus O Sullivan

Hi everyone,

Last week I was running one of my safety courses.

I always mention that guys should be trained in how to select and mount an abrasive wheel, and be deemed competent by employer. The usual respone is why would be need that to change a cutting disc on an angle grinder etc.

I usually hand out a wheel, ( which expired back in 2001) and asks if anyone could find a problem with the disc. Normally no one spots the fact that it is out of date by 8 years!!!

Last week I had 2 guys that did a course 3 weeks ago, and they claim they were never told about the expiry date.

Any comments about the guys not being told about the expiry date?

Seamus

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#2 Posted : 09 February 2009 14:54:00(UTC)
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Posted By Robert K Lewis
I trained somebody last week and he denies being trained at all this last six months!!

Very difficult to accept the word of some people on some occassions.

Bob
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#3 Posted : 09 February 2009 15:12:00(UTC)
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Posted By justgossip
curious,

how does age effect the integrity of an abrasive wheel

garry
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#4 Posted : 09 February 2009 16:39:00(UTC)
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Posted By Seamus O Sullivan
Hi Gerry

It is my understanding that they should be used within 3 years of manafacturer, if the manufacturer says it should not be used after a certain date, it is my belief it should not them be used after the date,

Anybody ever check the dates of the ones for sale?


Seamus
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#5 Posted : 09 February 2009 17:17:00(UTC)
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Posted By Flic
Some ceramics are susceptible to slow crack growth in the presence of moisture. You may have come across the curious case of toughened glass (popular in glass tumblers in schools) failing suddenly. This is due to slow crack growth through the outer layer of glass, which is in compression, followed by catastrophic failure when the crack reaches the inner layer, which is in tension.

Hence they can degrade with time. I guess this may be the underlying reason.

Flic

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#6 Posted : 09 February 2009 20:01:00(UTC)
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Posted By RP
The question here, without diverting the thread, is was the training previously given appropriate. Answer, NO.

PUWER, ACOP Uses Abrasive wheels as an example of the application of the regulations and lists what should be covered in the training, specifically the hazards and risks associated with using abrasive wheels.

One of these risks is from using a wheel (Fibre, resin, reinforced) which has passed its 'shelf life'. This is a basic item on any course. Where these employees have been trained you are justified in investigating this further. You first need to have a copy of the course content, duration, aims and objectives of the training.

If the training given was not appropriate then it should be reported to the HSE without fail to prevent the person delivering it from doing so again. Whoever carried out the training has placed your employees at significant risk.

I had experience of this with a local authority who's employees were told, on a 2 hour course' blue labels are for metal and green for stone'. So I gave them my own abrasive wheels test paper to do as they did not think they needed any other training. All failed miserably. The result was that I went back and did 11 further courses that included managers and supervisors.

People need to confirm the competence of trainers, its not just the cost but the quality of training...

If you find out that the training given was in appropriate, as a safety practitioner you have a moral duty to ensure it cannot hapen again.
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