With so many different ball screws on the market and the attendant flood of data from manufacturers, designers can have a tough time sorting out what truly affects ball-screw performance. Information ...

This close-up of the ball contact in a profile projector shows a gothic arch. It consists of at least two radii slightly larger than the ball used, but offset so the raceway touches the ball on both ...

Step by step tutorial on how to build a LEGO basketball arcade machine using standard bricks. This guide shows the full assembly process including the hoop, scoring area, and ball return system.

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