How to drill 40-50mm holes through cast iron?

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Please help...

New member
I'm attempting to drill (or bore) some holes into some cast iron in order to insert round steel tubes for a project. They will need to be approximately 40-50mm (depending on the pipe OD) and will be about 100mm deep. I know it would be best to use a mill (I don't have) however I was hoping to do this at home with using the pedestal drill. What would be the best method, and tool(s) to use or will I have to farm it out to someone else? Where can I buy the tools online?

Thanks in advance,

Shaun
 
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