If you're like me and use carbide tooling a fair bit, you may have read that it likes to run fast. This idea is further supported by the surface speed and feed recommendations you will often find printed on the back of those packets the inserts are sold in; and you might well have seen videos of those state-of-the-art industrial CNC machines in action getting perfect finishes every time. So in an attempt to approach these ideals, you may be tempted to run your lathe or mill as fast as she'll go whenever you're using a carbide tool; and I myself have applied this mindset countless times. Lately though, I have had to temper this with caution. I do some volunteer work repairing and maintaining the trains at the Victorian Goldfields Railway which runs between the towns of Maldon and Castlemaine, and I would go flat chat when using the lathe there provided the work was not too big or unbalanced; which has gotten on the nerves of the other people there, including the workshop manager. Many of these other people, including the works manager, are skilled machinists with decades of industry experience, and they tell me to also consider the stress that high speeds put on the machine you're using, particularly if said machine is old and a bit clapped out. I thought I should share this lesson in basic workshop practise here as a word of caution to those of you who are just starting out in this whole game, and to see if any of our more experienced members have anything to say on the matter, and can maybe add something to this, as this has been a bit of a wake-up call for me, as I am admittedly rather stubborn in many cases.