When drilling & tapping cast iron.
You never use any cutting oils,wax etc,nothing!!!! period.

I worked @ a machine shop,that machined Turbonetics turbine housings & other products of theres,no cutting fluid on CNC mill,tapping etc. Do not use any cutting fluid.


Another friend of mine owns a cylinder head shop,same thing,never use cutting fluids or oils on any cast iron etc.

OOHH B.T.W.,,,,
Did I say do not use cutting fluids???

Quote" less chance of binding the tap or breaking "
Wrong!!! using cutting fluids on cast iron will make it grab your tap & break it,do not use fluid for cutting cast iron.
http://books.google.com/books?id=7eaCQoB...num=4&ct=result

There might be some hybrid/special cutting fluids,paste or other stuff,available now,,,but I have not heard about it,anyone?


MBHD

12 port SDS EFI