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 ...

The Woodwright's Shop is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV ...

One of the six simple machines, a screw is nothing more than an inclined plane wrapped around a center pole. While today screws come in standard sizes, and typically are tightened by turning clockwise ...

One of the challenges with 3D printing is seeing how far designs can be pushed before they break. This includes aspects like flexible hinges and structural components, but also smaller details such as ...

A technique to manage an unusual presentation of an implant abutment screw fracture is presented. Causes of abutment screw loosening and fracture are reviewed. Design features that improve the ...

Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...

A few of the screws in my case have stripped threads and I can't remove them. They are easy to turn but just fall back into place at one point, and is seemingly impossible to remove.<BR><BR>How do I ...

Shoulder screws, also known as shoulder bolts and stripper bolts, are machine screws with an integral shoulder or journal between the head and thread. Although they are not readily available in local ...

Roy Underhill shows how to use an 1889 foot-driven metal working lathe. Make your own darn metal screws with this 1889 foot-powered lathe! Roy shows how to cut perfect threads, cones and tapers in ...

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You’ve experienced this. You glance into your refrigerator and say to yourself, “hmmm, low on ketchup, I better pick some up.” That’s how I am with shop supplies. I constantly scan my stash of glue, ...