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 ...

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 ...

Jam Handy! Provides a detailed overview of the process of cutting screw threads on a lathe. It explains the different types of screw threads, the importance of precision in machining, and outlines the ...

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 ...

New research has answered the mystery of how the Crystal Palace in London, which at the time was the world's largest building, was constructed in only 190 days. The study, led by Professor John ...

Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. Tapping screws form mating threads in materials they are driven into ...

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 ...

As the screw cuts, it produces dust. Masonry screws are engineered to clear dust away from the area to prevent binding. For ...

Clinton Victor Johnson, an expert in screw-thread gauging technology, died Monday. He was 97. A founder of The Johnson Gage Co. in 1940 with his brothers Paul W. Johnson and Stanley G. Johnson, ...

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 ...

Last year, we saw [How To Make Everything’s] take on [DaVinci’s] machine for cutting threads. However, they stopped short of the goal, which was making accurate metal screw threads. After much ...