>=20
> Its kinda cool - the big rotary hammer drill uses a pneumatic slide=20
> hammer / piston and it takes a few seconds of operation for the=20
> hammer piston to synchronize with the driving piston.  I describe it=20
> as the drill riding on an "air cushion".  The drill essentially pumps=20
> up and actually lifts itself / pushes away from the drill bit.  The=20
> most effective drilling operation occurs when the drill is riding on=20
> the air cushion.  The drilling effectiveness decreases dramatically=20
> if you push too hard and force the drill to the bottom of the air cushion=
..
>=20
> dwayne
>=20

Yes, I recently bought a rotary hammer drill for the purpose of removing a=
=20
large chunk of concrete burried in my garden, using a drill and chissel to=
=20
divide it in smaller chunks. At first I was very disapointed since I pushed=
 as=20
hard as I could and nothing much happened. But as soon as I eased on the=20
pressure it really started to work. It took some practice to find the most=
=20
effective pressure.

/Ruben

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124
200 39 Malm=F6 Sweden
www.liros.se
Tel +46 40142078
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

--=20
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