Reply To: Bench Grinding Wheel Selection

[david pierce]

Dan,
Cast iron can be machined with steel. It requires a slow rpm, a heavy feed and a compressed air blast. Do not use any oil or coolant with cast iron. The iron or carbon in the iron acts as a abrasive and eats up your tools; especially drill bits. The air blast is to blow the abrasive iron powder away from the cutter.
david