For most applications you dont need any cutting fluid. And oil is not a substitute for cutting fluid. Oils are used to stop friction and thats the opposite of what you want when you are tying to cut. Cutting fluids help metal to metal contact and draw the heat away from the tool and work.
jbiehler t1_ir4bc06 wrote
Reply to Can i use 3 in 1 brand all temp fluid to lubricate drill bits when drilling (steel?) hinges? by drummerene
For most applications you dont need any cutting fluid. And oil is not a substitute for cutting fluid. Oils are used to stop friction and thats the opposite of what you want when you are tying to cut. Cutting fluids help metal to metal contact and draw the heat away from the tool and work.