Tractor Spur Gears Helica Gearshaft Helical calces motricium Geararhaft 16MnCr5 Helical Geararthaft & Helical calces Spromus Bevel Gear Hypoid Gears Dindori altum praecisione Iso5 calces hypoid Hypoid calces paro Km series hypous anni ad hypoid Gearbox Eculeo et pils Helix angulus XLIV gradus circulum anni Gears Tondenti Helica tractor Gears