From our friends at Rexnord, here's a great introduction to replacing an insert on a ball bearing mounted unit. You can do it, I promise!
Jaw couplings as so common, we might take for granted proper installation. Here's a quick video from TB Woods demonstrating the best way to get the most life out of your coupling.
Learn how to properly tension a v-belt drive. This is the most important step in the correct functioning of this common power transmission system.