pdm
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 posted on 5/9/10 at 07:54 PM |
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Angle grinder disks
Evening
This will probably sound like a daft question but I don't want to injure myself !!
When I use my small angle grinder, 115mm, I tend to let the metal cutting disks wear right down to just a few cm's across as they don't
seem to last long.
On the larger 230mm discs, is it ok to do the same ? Or do they have a wear marker or something ? Instructions don't seem to say and there are
no obvious wear markers on the disk.
Also the disc turns clockwise when looking from the top of the grinder - am I correct in assuming I therefore cut right to left ?
thanks in advance
Paul
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hillbillyracer
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| posted on 5/9/10 at 10:01 PM |
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You can wear them down as much as it practical access-wise. I suppose in theory as the disc wears & its mass reduces the centrifugal force trying
to tear it apart gets less & the workpiece has less leverage over the disc, so it's at most risk when un-worn.
The real risk would be from using a disc which is damaged either by the work grabbing it & tearing/cracking it or some damage by dropping the
grinder etc, if you see any damage on the disc replace it, if it flies apart & a sizable chunk of it hits you it will do damage.
& yes, when using it you move in the direction the disc wants to pull the grinder, I dont know that there's anything saftey-wise in it but
it's just easier & more natural.
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RazMan
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| posted on 5/9/10 at 10:39 PM |
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You can wear them right down until they become useless with no 'reach' but either way make sure to wear goggles - when they let go they
fragment all over the place.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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907
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| posted on 6/9/10 at 06:16 AM |
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Assuming your large and small discs have the same i/d (7/8" . 22mm) you can use up the large ones on your small grinder,
i.e. wear them down to 115mm.
Paul G
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Stott
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| posted on 6/9/10 at 06:37 AM |
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I always cut against the disk direction, i.e if I'm holding the grinder in my right hand, I cut down.
Pretty sure that's the way to do it as there's more control against the disk pulling itself out of the cut and damaging something/you.
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pdm
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| posted on 6/9/10 at 06:44 AM |
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Excellent - thanks everyone.
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iank
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| posted on 6/9/10 at 06:57 AM |
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quote:
Originally posted by Stott
I always cut against the disk direction, i.e if I'm holding the grinder in my right hand, I cut down.
Pretty sure that's the way to do it as there's more control against the disk pulling itself out of the cut and damaging something/you.
and the sparks don't spray in your face, even with goggles etc. that's still to be avoided.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Peteff
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| posted on 6/9/10 at 08:22 AM |
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It's easier to follow a line if you push the grinder away from yourself and the guard should be turned to stop sparks hitting you according to
the angle you are holding the grinder at. The sparks go in the same direction whichever way you cut.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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GMPMotorsport
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| posted on 6/9/10 at 09:21 AM |
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quote:
Originally posted by 907
Assuming your large and small discs have the same i/d (7/8" . 22mm) you can use up the large ones on your small grinder,
i.e. wear them down to 115mm.
Paul G
Always check the speed of the machine against the speed of the disc!
www.gmpdevelopments.co.uk
www.gmpmotorsport.co.uk
ARDS Instructer.
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Benzine
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| posted on 6/9/10 at 09:39 AM |
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1. buy decent discs
2. wear eye protection
3. wear ear protection
4. Win @ life
The mental gymnastics a landlord will employ to justify immoral actions is clinically fascinating. Just because something is legal doesn't make
it moral.
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pdm
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| posted on 7/9/10 at 08:20 AM |
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thanks again everyone - welcome advice
nothing for it now but to fire the beast up !!
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MikeR
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| posted on 7/9/10 at 11:53 AM |
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quote:
Originally posted by Benzine
1. buy decent discs
2. wear eye protection
3. wear ear protection
4. Win @ life
5. Wear decent gloves - i use my welding gauntlets
6. wear fireproof clothing (leather aprons cover this), figuring out your crotch on fire is only funny after the event. The comedy being telling the
story in pub after and getting to the point where you realise that you have fire on your crotch and you have to basically slap yourself in the balls
to put it out. It is not funny at the time.
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serieslandy
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| posted on 7/9/10 at 12:13 PM |
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Wear gloves I was using my 9 inch grinder it caught a bit of metal jumped onto the base of my thumb. Deep cut, 4 hours in A&E and 6 weeks
of not being able to lift anything.
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bartonp
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| posted on 8/9/10 at 11:34 AM |
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Here's the hard part:
Apart from all the other great advice about protective clothing - try to wear something to stop you breathing in the dust.
Takes some experimentation, as most masks seem to be incompatible with most goggles....
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iank
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| posted on 8/9/10 at 11:43 AM |
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quote:
Originally posted by bartonp
Here's the hard part:
Apart from all the other great advice about protective clothing - try to wear something to stop you breathing in the dust.
Takes some experimentation, as most masks seem to be incompatible with most goggles....
Agreed, I use a 2 filter rubber mask with safety specs AND a full face shield.
Rather sweaty and a PITA but better safe than sorry.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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