Recent Blogs
Two Fixed and One Movable Pulley: Three-part Tackle Calculator
Explore the shown 3:1 tackle and compare haul force using an assumed per-sheave tension ratio. Results do not rate a lifting system.
Simple Lifting Pulley Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Explore a fixed pulley with a continuous rope animation. Calculate effort from load and selected efficiency, plus the sheave-to-rope diameter ratio.
Swinging Derrick Crane: Load-moment Comparison
Compare load times horizontal radius with an entered moment reference. Explore ideal moment arithmetic and illustrated boom geometry without inferring crane capacity.
Worm-gear Winch: How It Works, Parts and Drum-Rotation Calculator
Explore worm-gear winch rotation. Calculate reduction ratio and ideal drum turns from wheel teeth, worm starts and crank turns; no lifting rating is calculated.