Recent Blogs
Ferguson's Mechanical Paradox Mechanism Explained: How It Works, Gear Diagram, Parts and Uses
Ferguson's Mechanical Paradox explained — how three loose gears on one arbor produce forward, reverse, and stationary outputs from a single input drive.
Compound Gear Train: Two-Stage Ratio and Speed Calculator | FIRGELLI
Calculate stage ratios, total ratio and ideal output speed for two external gear pairs linked by a common intermediate shaft. Includes examples and animation.
Cardan Straight-line Mechanism: How It Works, Diagram, Formula, and Uses Explained
Explore the Cardan straight-line mechanism: a half-size pinion inside a fixed ring. Compare pitch diameters, stroke and tooth counts in the ideal 2:1 geometry.
Planetary Motion: Exact Fixed-Ring Speed Geometry
Planetary motion in gearing — how sun, planet and ring gears combine to deliver high torque density in robotics, automotive transmissions and wind turbines.
Epicyclic Train (slow-motion Form) Mechanism Explained: How It Works, Diagram, Parts and Uses
Explore a two-ring compound epicyclic train. Compare signed output motion, reduction magnitude and module scaling needed for a common carrier radius.
Capstan Gear: Planetary Reduction, Direct Drive and Interactive Calculator
Explore a planetary capstan gear with slow and direct-drive modes. Compare drum speed, ideal output torque and planet spin from the selected tooth counts.
Differential (mechanical Device) Mechanism Explained: How It Works, Parts, Diagram and Animation
Explore an open bevel differential with rotating carrier and spider gears. Calculate both output speeds and relative spider spin from carrier speed and offset.