A new machine promises to thread bolts in one pass. Recently unveiled by Rebuilders Unlimited Machine Co. Inc. (RUMC), Waynesboro, Pa., the R-UMatic Thread Cutting Machine takes advantage of GE ...

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 ...

Grooving or recessing operations, sometimes also called necking operations, are often done on workpiece shoulders to ensure the correct fit for mating parts. When a thread is required to run the full ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...