Apways, great advice, my friend. Cast iron tools often require my tapping "skills." Slow and steady wins the race, @glennnow. (Glenn, you're obviously a night owl like me?).
Back in the day we use to call it bench work. Working with your hands is almost a lost art. It's the word "slow" in slow and steady that management don't like. It's the always wins the race they don't understand. That's why bench work will disappear some day. A lost art. Later Slinger.
There is more money in tech skills. I understand why young people would go for high tech jobs. They can make 6 figure salaries 3 years of experience. Thats not going to happen doing manual machining. It does make a good Hobby RU-vid channel for an old retired guy. Lol.
Cast Iron is often drilled and tapped dry due to its self-lubricating graphite content. However, cutting fluids help reduce friction between the chips and the tool face. The never use comment when tapping cast iron is a bit much. Lets just say that you don't have to use a cutting fluid. As far as air pressure, thats always a good thing when tapping. Thanks for watching and commenting.
