Recent Blogs
Internal Spur Gear and Pinion: Pitch Geometry Calculator | FIRGELLI
Calculate ideal fixed-axis internal gear ratio, center distance and same-direction ring speed. Tooth interference, capacity and planetary motion are not calculated.
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 (form 1) Mechanism Explained: How It Works, Parts, Willis Ratio and Uses
Explore a fixed-ring planetary reduction. Derive planet teeth from sun and ring counts, then compare carrier speed and ideal torque multiplication.
Epicyclic / Planetary Gear Train: How It Works, Parts, Ratio Formula, Diagram and Uses Explained
Explore a fixed-ring planetary reduction and check tooth-count compatibility. Compare sun input, carrier speed and required planet geometry.
Compound Epicyclic Train: Carrier Input, Gear Ratios, Animation and Calculator
Explore a carrier-driven compound epicyclic train with two internal rings. Compare all four tooth counts, output direction, speed ratio and required module ratio.
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.
Bevel Gear Differential Pitch System Mechanism: How It Works, Diagram, Parts, and Uses
Bevel gear differentials split torque between two output shafts while allowing speed difference — used in automotive axles, robotics, and machine tools. Full guide.