coozer
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| posted on 9/3/09 at 01:22 PM |
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Aldi Mr. Angry
Mr. Angry
Is the diamond blade in the picture any good at cutting metal?
I'm looking for thin cutting discs to do a delicate job turning a gas bottle into a wood burner. Always thought the composite ones were all you
could use on steel???
1972 V8 Jago
1980 Z750
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MikeCapon
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| posted on 9/3/09 at 01:28 PM |
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I wouldn't have said so. The few times I've inadvertently cut steel with a diamond disc it seemed painfully slow and the disc seems to
want to kick back.
If you want a tidy job the 0.8mm metal cutting discs are excellent, if a bit fragile. Just let the disc determine the feed rate and they do a superb
job.
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James
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| posted on 9/3/09 at 01:30 PM |
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Doesn't look the right sort of thing for your job at all.
I would think it would catch on metal and kick up the grinder.
In fact suggesting that's for metal when it's the exact profile of proper brick/masonary cutting discs I've bought strikes me as a
big mistake!
Looks bloody lethal to me! 
I'm not sure if they're any good but spotted in Wickes at the weeked 0.8mm metal cutting discs for about £8 for 5.
HTH,
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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Mr Whippy
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| posted on 9/3/09 at 01:37 PM |
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diamonds are no use for metal unless they are cooled. I use to design and test offshore drills that used them for cutting through metal and without
the mud flow they got nowhere. Once their glowing, the diamonds evaporate very quickly
Fame is when your old car is plastered all over the internet
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owelly
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| posted on 9/3/09 at 01:38 PM |
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I would have said no until my builder mate was using a 'demolition disc' in his Stihl saw!
http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Power-Tools/Angle-Grinders-Discs/UPP-Demolition-diamond-cutting-discs/76421/kw/
http://www.ppcmag.co.uk
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sucksqueezebangblow
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| posted on 9/3/09 at 01:42 PM |
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No, the diamond discs are for bricks, masonry, ceramic tiles, roof tiles and concrete. You'll need conventional (black)cutting discs. When
I've bought them from Aldi they came in packs of both thick and thin discs. The thin ones are best for cutting and the thick for grinding.
Better to Burnout than to Fade Away JET METAL ~ AndySparrow © 
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Vindi_andy
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| posted on 9/3/09 at 01:51 PM |
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They show a pack of metal discs for £3.99 id pick some of those up at the same time personnally.
Mind you Im lucky my brother in law works for an abrasive sales company so the odd sample disc tends to walk into my garage from time to time
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splitrivet
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| posted on 9/3/09 at 02:10 PM |
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Only use em for metal if youve got a death wish.
If memory serves I dont think the last lot of cutting and grinding discs I bought from Aldi were much cop, but it could have been Lidl.
Cheers,
Bob
[Edited on 9/3/09 by splitrivet]
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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MikeRJ
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| posted on 9/3/09 at 02:27 PM |
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To be fair it doesn't state the diamond disks are for metal use:
"Metalwork, bricks, paving slabs, ceramic tiles, rusty rivets – slice through them all with ease."
This is about the angle grinder and it entirely true when suitable disks are used. It just so happens that the grinder come with a couple of diamond
disks (which is a bonus if you need to do any masonry work).
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AndyW
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| posted on 9/3/09 at 03:33 PM |
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diamond blades should not be used for cutting metal. The make up of the matrix (the segment that contains the diamonds) is designed to wear and
therefore expose new diamonds. this is done by the abrasivness of the material being cut. Cutting just metal will wear the matrix too quickly and
destroy the diamond or they just fly out. If they actually use diamond which is unlickley (they use an artificial diamond made of diamond dust and
chippings and artificial man made diamond substitute) then these should be water cooled and not just for cutting metal. Use a slim line narrow profile
abrasive disc and as said let the blade determine cutting speed and all should be ok.
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tomprescott
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| posted on 9/3/09 at 05:28 PM |
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If you want to cut metal, get on machine mart or screwfix and get a proper cutting disc, I think they're about £30-40, don't do it with a
diamond disc - bad idea.
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RoadkillUK
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| posted on 9/3/09 at 06:30 PM |
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Before we knew much about angle grinders, me and my brother chopped up the donor escort with the diamond wheel. Did the job but grabbed quite a
bit.
You want to use the 0.8mm cutting disks for the gas bottle as they work a treat. See below 
We started this at the weekend in my workshop/garage/cellar/hideaway.
Roadkill - Lee
www.bradford7.co.uk
Latest Picture (14 Sept 2014)
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flak monkey
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| posted on 9/3/09 at 06:49 PM |
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Diamonds actually 'dissolve' when cutting steel (they get hot enough for the carbon to diffuse into the surface of the steel). Why do you
think diamonds arent used for hard turning steel?
If you realllly want to remove some metal CBN is the way to go, aint cheap though
Stick with the std abrasive discs....
David
Sera
http://www.motosera.com
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