Hi Guys..got a question in regards to drilling CAST IRON
Ive got a 800mm diameter domed 9mm thick cast iron fire pit..its great..BUT when it rains it fills up with water..I dont want to have to make a lid for it so the next easiest solution is to drill a hole in the bottom so the water can drain.
I cant say I have ever drilled cast iron..any secrets or problems I should know about.
The last thing I want is it to crack (if thats possible)
So do I drill fast or slow speed, are there special drill bits or will normal high speed steel bits do
Much appreciated in advance
Kind Regards John...Albany Nomads
Done... Slow speed, started with small bit worked up to larger bit with lubricant ... Just like drilling std steel
John
As you have found out grey iron is pretty free machining and can generally be done without lube at lower speeds
cheers Simon
Yep no lubricant for cast iron, it's machined dry.