The best tool that I have found for making drainage holes in bonsai pots is
a diamond core drill; however, they are a bit expensive. A suitable
substitute is a small length of copper tubing. The working end must be
absolutely square with the tube (a tubing cutter will make an acceptable cut).

You really need a bench drill or drill press, but a hand drill will work if
one is very careful.

You will also need some Carborundum or some auto valve grinding compound
for the cutting abrasive. You will also need some water for cooling the
drill or copper tube (a spray bottle works well).

Apply the grinding compound to the bottom of the pot where you want to make
the hole and start the drill press with slight amount of pressure to get
the hole started. While drilling maintain a supply of water and grinding
compound at the hole area to keep the drill cool. If too much heat builds
up, the pot may crack.

Maintain a slight amount of drill pressure until the hole is through the pot.

A ceramic drill bit will work, but it will cause lots more cracking around
the hole.

Not exactly rocket science

************************************************** ******************************
++++Sponsored, in part, by Boon Manakitivipart++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ --
+++++ Questions? Help? e-mail +++++