SOHO Machinery Factory is a professional manufacturer which specializes in making rolling ring drives ( traverse unit, linear drives, linear motion assemblies) in China. OrientKnight has been the famous brand in China since 1985 when SOHO Machinery Co. Ltd. invented the first rolling ring drive, and its brand product has been sold abroad. Continuously renewed and updated, the third generation products of aluminium alloy with the craftsmanship and technology introduced from Germany deliver superior performances.