They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

Q: I was installing some cabinets and trying to screw the two frames together. I didn't have much luck, as the first time I attempted this I twisted the screw head right off of the screw. Luckily, I ...

The degree to which a ball screw performs well in the field is the direct result of the process used to make it. Grinding, rolling, and whirling are the most common ways to thread ball screws. Some ...