Recent Blogs
Four-guy Mast Derrick Mechanism Explained: Parts, Guy Tension Formula, and Rigging Diagram
Four-guy mast derricks lift heavy loads on construction, salvage, and rigging jobs. Learn the geometry, guy tensions, and a worked sizing example.
Air Winch Mechanism Explained: How Vane Motors, Planetary Gearbox & Drum Deliver Line Pull
Air winch explained: how a pneumatic winch works, key components, lifting formulas, and worked examples for offshore, mining, and theatrical rigging applications.