I used to use motor oil to keep from burning up the drill bits but this cutting oil works so much better.
Cutting oil for drilling stainless steel.
While a common material drilling and tapping stainless.
Stainless steel actually is designed to bend a little bit before it breaks.
Stainless steel exotic alloys and very hard metals demand a very high level of performance from the cutting oil.
This characteristic makes it challenging to break the chip which is especially important in a drilling operation because the chips need to be broken and evacuated from the hole as quickly as possible to reduce the chance of recutting.
I use this cutting oil when working with a drill press and it works great.
What stainless tends to do is work harden fairly quickly when heated and drilling at high speed creates a lot of heat.
Makes the drilling much easier and greatly extends the length of time between sharping drill bits.
When stainless steel work hardens it becomes very hard and extremely difficult to drill.
Non corrosive and easy to clean stainless steel is revered both for its strength and its appearance.
Here is the right way to drill stainless steel.
The key is keeping the production of friction generated heat to a minimum either with cooling pastes and liquids or believe it or not plain ol water.
Stainless is actually a relatively soft metal at least in its initial state.
Where tough low machinability metals are involved you will need highly additized cutting oil with excellent extreme pressure ep and anti weld.