Just drilled to holes to mount my mill vise.

I used 450rpm.

First hole with a 1/8 drill.

Second hole with a 3/8 drill.

Steel plate thickness was 8mm.

my 2 cents

"Dave" wrote in message
...
Hiya

I have just tried drilling some 3mm thick mild steel with a 13mm
hole......... hell of a lot of noise, loads of vibration and now the drill
seems to do anything but drill!

Ok, please stop laughing, I'm a beginer!!

The drill bit was a Piranna 'Bullet' that it said was for drilling metal,
but what I have only just realsied is that the max recomended rpm for 10mm
was about 1000. The drill was the cheapest Clarkes one speed drill (i'm on
a
budget and this might be a '1 of' project) so I guess this is much faster.

So my questions a
Is the drill running too fast? What speed should i drill 12mm holes at?
Does
anyone know where I can the cheapest drill to drill at the recommended
speed?

Thanks for any help given

Dave