Recent Blogs
Travelling Crane: Plan-view Geometry Calculator
Compare bridge span and an illustrative endpoint offset. Calculate geometric skew angle, offset/span ratio, a selected length quotient and diagonal excess.
Block and Tackle Mechanism: How It Works, Parts, Formula, and Mechanical Advantage Explained
How a Block and Tackle multiplies lifting force using rope and pulleys. Mechanical advantage formulas, rigging examples, and real sailing and crane applications.
Electric Hoist Mechanism Explained: How It Works, Parts, Power Train Diagram and Calculator
Explore an electric wire-rope hoist and compare speed ratios, suspended weight, drum torque, line speed and ideal lifting power using effective winding diameter.
Swing-boom Crane: Ideal Load-moment Calculator
Compare load-plus-hoist and uniform-boom weight moments from entered weights and distances. Results are moment demands, not crane capacity ratings.
Automatic Balance Crane Mechanism: How It Works, Parts, Formula, and Uses Explained
Explore a moving-counterweight crane concept and compare ideal hook-load moments, position error and an illustrative reference band.
Hydraulic Lift Ram: Ideal Force and Swept-Volume Calculator | FIRGELLI
Convert ram bore and pressure into ideal force, force-equivalent mass, area and swept volume per millimetre. These values do not establish a lift’s load rating.
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.
Block and Tackle: Supporting-Parts and Ideal Work Ledger
How a Pulley works, with the formula, real industrial examples from cranes to elevators, and engineering tradeoffs vs gears, levers and hydraulics.
Differential Pulley Mechanism: How It Works, Diagram, Formula and Uses Explained
Trace the endless chain in a Weston differential pulley. Compare upper-wheel diameters and calculate signed hook travel and the ideal force ratio.
Traveller Hoist: Ideal Equal Wheel-load Comparison
Explore a trolley-mounted hoist and compare an assumed vertical load shared equally between wheels. Results do not rate the hoist or its supporting beam.
Harrington CB Hoist: Catalog Pull and Chain Travel | FIRGELLI
Look up listed CB model ratings and calculate hand-chain travel from overhaul ratio and desired hook lift. This tool does not select a hoist or...