Differential Screw

Combination of two screws of different pitch, so that one revolution of the screw moves the load through the difference between the pitches. Usually one screw works inside the other on the same axial line, and the screw of smaller pitch is left-handed. When the screws are both female, and are to draw two male threads together, they will both be right-handed. IMG:content-1159.jpg:[merged small][merged small][merged small][subsumed][ocr errors] IMG:content-1160.jpg:[blocks in formation]