drilling cast iron

huangyhg

drilling cast iron
i have a non-structural piece of cast iron about 1" thick that needs a hole drilled through it.  are there any special requirements for drilling through cast iron, and would a normal steel drill bit work?

pylko,
it often helps to prevent cracking after drilling by chamfering the id of the hole at the top and bottom with a 45-degree chamfering bit. this is especially helpful under loaded washers and nuts.
david