cutting cast iron soil pipe

[djp]

hi i am planning on cutting a 40 mm hole in a cast iron soil pipe with a hole saw and drill bits and we are debating about lubrication the mrs thinks we don't any due to graphite in the pipe or something so it's self lubricating and i am thinking that a bit of wd40 will do the job nicely, please advise?!
thanks Dan

 

[^neo^]

slowly, with lots of engine oil on the cutter or you'll kill it!

 

[holmslaw]

Cast iron drilling does not require any lubrication, I know because I've drilled many many holes in cast iron.

 

[Diyisfun]

When I was an apprentice, I was told it was water to lubricate.