Re: Plus one for ALDI and nearly minus one for ALDI

john@xxxxxxxxxxxxxxxxxxxxxxxxx wrote:
On 16 Jun, 08:27, "Dave Baker" <N...@xxxxxxxx> wrote:
"Mark Rand" <ra...@xxxxxxxxxxxxxxxxx> wrote in message

news:arta54hjqdugtcjur96amm7lfkum1s90qg@xxxxxxxxxx

Also had cause to use a 9" diamond wheel from the same source. This
was no better than it should be cutting four year old concrete with
flint+quartz aggregate in it... On the other hand, IIRC it was
three quid and will last about half as long as one of my £40
brand-name wheels. So maybe it isn't such
a bad bargain after all. In fact, when I see them again, I'll
probably stock
up.

Just a thunk. Would one of these or something similar sharpen carbide
inserts if you made up a mandrel for it for the lathe or mill? I
have my faithful old Cronos diamond cup wheel but the edge is a tad
rounded so you need to dig into the insert a fair way to get past
the radius and achieve a sharp edge on the insert. These blades are
presumably very sharp edged so hopefully you could just lick over
the tip of an insert with them. Diamond is diamond after all so I
guess if it'll cut stone it'll cut carbide. --
Dave Baker
Puma Race Engines

No Dave they don't work.
I had the same idea a while ago when diamond wheels were expensive but
the smaller 4" tile cutter were cheap.
I had to buy a new tile cutter disk anyway so fitted onto a small
grinder I keep for licking tips up.
Not good results as the diamond isn't smooth and it bounces the tip
about and chips the edge.

Mind you decent diamond wheels are now that reasonable that it's not
worth messing. I have a small 3,000 rev doubled ended motor, not a
grinder, that i have 4 wheels mounted on permanent. A cup and a plain
wheel on each outer end and a couple of thin knife edge type mounted
inboard for things like nicking the inner cutting edge of end mills
etc.

If you stick to 100 mm wheels they cost about 10 quid up to 17 quid
from ARC depending on type.

With some of these inserts costing 5 to 7 quid a pop you can soon get
your money back if you only get one new lick per insert.

John S.

Fairy nuff. The cost of inserts is a mystery though too seeing as carbide
burrs with more mass and complexity can be bought on Ebay for less than
standard inserts.
--
Dave Baker
Puma Race Engines


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