core drill bit

Quoted text begins.Dan it was visualthinker that was asking about this subject. Why would you
use a angle grinder to run core bits? It seems like a misapplication......
daed
End of quote.

Rodger that!
Just because something will fit on a certain tool doesn't mean it should be
used on it.I has the capability of putting a 10" tablesaw blade on my
weedwacker but I wouldn't ever dare to do it.
If it was me I would find an adapter(5/8-11 perhaps) to allow the bit to be
used in a drill.A drill would allow the bit to be started at a low speed and
then brought up to operating speed once it was firmly engaged.A drill would
also allow more even downward force to be applied when used with an
auxiliary handle in line with the grip.
If the bit doesn't have a pilot bit in the center to guide it then it was
meant to be started in a stationary coring machine and not freehand.The way
around this is to use a plywood template to capture the bit as Simon
suggested or to start the hole using something that does have a pilot(a
holesaw was suggested but the appropriate sixed hammer drill bit works just
as well if the core bit is small) to create a shallow starting counterbore
that captures the bit and holds it in place.
All bits need a way to clear the swarf created by thier cutting
action.Either air or water serves 2 functions in drilling they both cool and
clear the bit.Water also serves as a lubricant and works better than air to
clear the bit.Whenever possible use enough water to allow you to see what
you are doing and you're sure to be clearing the bit sufficiently to allow
the work to progress as it should.It's cheap(relative to the bit)use alot.

Bob