Comments: - - I'm not a machinest but I do enjoy watching videos on cnc machining it's amazing how accurate it does it work with all the steel moving as fast as it does and stopping exactly where it's told to stop. But I do have a question 6:40 how does the tool know where to line up when cutting the groove for the threads with each pass without it starting a new set of grooves I find interesting how fast the material is spinning yet the tool finds the same groove all the time.

I did my apprenticeship at a place called Power Plant gears ltd in West drayton UK. They manufactured massive gears and gear drives just like this. It shut in the mid eighties so there was no CNC machining. After the gears were cut they would be hand scraped and lapped to perfectly bed the gears together. Our main gear cutting machines were Schiess from Germany. Power Plant claimed to be the pioneer in helical gear cutting. They had been going since 1903 and at one time actually built gear cutting machines.

6 00 so satisfying watching the clean finish pass. I always wonder why they are cutting dry? Been a CNC lathe machinist for over 10 years and we run coolant on everything we do. We also manually program everything as well. They are always wanting to push the conversational crap on us which just seems unnecessary for the things we run which is hardly ever anything new. So all of our larger programs are kept on file so we can just set up and run. I see no need for any additional computerized programming. Hard to stay fresh on something you rarely use when your so used to manual programming.