A Reddit for Machinists of all varieties. From Old School conventional guys, to CNC Programmers, to the up and coming next generation.

Threading insertsize chart

Threading carbide inserts are cutting tools made of hard, durable carbide material used to create threads on screws, bolts, and other components in manufacturing. They are inserted into a tool holder and can be indexed for different thread pitches and profiles.

What's behind the resistance to forming taps? I can understand not using them if you run a substantial amount of cast iron, but even shops that run almost exclusively aluminium don't seem to use them often.

I'm an engineer, I work closely with machinists and I can run machines, but I wouldn't call myself a machinist. I have messed around with a few different types of taps on CNC machines and I absolutely love forming taps. No chips to worry about, amazing tool life, excellent bottoming performance, and stronger threads. In a shop where 90% of parts are either aluminium or pretty conventional steels like 1018 and 4140, forming taps seem like a no-brainer, but we we don't use them, and I very seldom see them in other shops.