Before the fighting starts about term definitions, let's just settle on using “adjustable drive pulley” and “sheave” interchangeably to describe the belt-driven power transmission device shown above. Second, for the newer tech, you shouldn't be altering these sheaves so that the belt rides lower or higher in them unless you know EXACTLY what you are […]

  I walked into a supply house the other day and looked at a “universal” expansion valve on the shelf. The friendly guy behind the counter saw me and walked over. After saying hello, he said: “That's a great valve; it's even balanced port.” Now, I am a bit of a troublemaker. I should have […]

This is a business article I wrote several years ago. No hard-hitting tech tips, but I still hope you find it beneficial. “What would you do if you had a time machine.?” It’s a question that came up at least 17 times in your first week of 6th grade, answered with the typical “kill Hitler” […]