Customer

A customer sent a print for a hydraulic cylinder barrel. The print called for a 100mm bore through 3 meters of barrel with a surface finish of Ra 0.2um as-drilled, with no honing allowed. I looked at that print for a solid five minutes before I picked up the phone. I checked it twice to make sure I was reading it correctly. The no-honing note was circled in red with an exclamation mark. Someone at the customer had already flagged this as a critical requirement. ...

A customer called me on a Tuesday afternoon. They had a part redesign on their hands and needed a 1mm diameter hole drilled through 400mm of Inconel 718. I asked them to repeat those numbers because I thought I had misheard. They had not misheard. A 1mm hole through 400mm of material gives a length-to-diameter ratio of 400 to 1. For context, a standard gun drill with a 1mm diameter has a flute length of roughly 150mm before the brazed joint at the shank. Going 400mm deep means the drill would need to cut 250mm past the end of its own flute support. ...

The Customer Who Refused to Let Me Inspect the Part I’ve been running CNC lathes for about fourteen years now, and if there’s one thing I’ve learned, it’s that gut feelings on the shop floor are usually trying to tell you something. This story starts with one of those feelings, and it almost ended with a fifteen-thousand-dollar chargeback. The job came in through our regular quoting process. Nothing special about it on paper. But from the moment the material showed up, something did not sit right with me. I have learned to pay attention to that feeling. ...