Recent Blogs
Friction-clutch Wheels: Torque Threshold and Demand | FIRGELLI
Compare ideal wheel-contact torque with load demand using coefficient, normal force and radius. Understand margin, demand excess and the limits of slip modeling.
Friction Gearing: Driver Torque and Utilization | FIRGELLI
Compare a driver-shaft friction torque limit with demand using normal force, coefficient and driver radius. Keep driver and follower torque distinct.
Friction Disc and Roller: Speed and Disc Torque | FIRGELLI
Calculate ideal roller speed and disc-side torque from contact radius, roller radius, normal force and friction, with separate input/output torque meanings.
Friction Cone Variator: Contact Radius and Roller Speed
See a rotating cone drive a movable friction roller. Compare output speed and contact surface speed from cone radius, roller radius and input RPM.
Flying Machine: Rotating-Arm Worm Drive Calculator | FIRGELLI
Explore a worm-driven rotating arm. Compare speed reduction and assumed torque multiplication while keeping backdrive behavior and actual load capacity separate.
Evans Friction Cones: Ring-Belt Ratio Calculator | FIRGELLI
Move a leather ring between opposed friction cones and compare mean contact diameters and ideal speed ratio. Finite ring width introduces slip.
Equalizing Pulley: Sheave Motion, Rope Tension and Calculator
Explore an equalizer sheave with two vertical rope legs. Compare ideal tension, sheave-to-rope ratio, groove clearance and a measured breakaway difference.
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.
Epicyclic Train (form 5) Mechanism Explained: How It Works, Diagram, Formula & Calculator
Explore a carrier-driven planetary step-up with fixed ring and sun output. Compare speed multiplication and ideal torque fraction from ring and sun tooth counts.
Epicyclic Train (form 4) Explained: Step-Up Planetary Gearbox Mechanism, Diagram & Formula
Explore a carrier-driven planetary step-up with fixed ring and sun output. Compare speed multiplication and ideal torque fraction from ring and sun tooth counts.
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.
Elliptical Spur Gears: Animation and Variable-Speed Calculator
Explore matching focal elliptical gears and calculate live pitch radii, speed ratio and output rpm through one variable-speed revolution.
Eccentric Wheel Train Mechanism Explained: How It Works, Diagram, Parts, Formula, and Uses
Explore the fixed inclined bevel wheel and carried compound shaft of an eccentric wheel train, with an exploded animation and illustrative reversing-speed calculator.
Eccentric Spur-gear with Link Control Mechanism Explained: How It Works, Parts, Diagram & Uses
Explore an eccentric three-gear train with linked centers. Adjust offset, module and input speed to calculate the varying output speed and see both gear meshes.
Eccentric Gear Train: Elliptical Planetary Animation and Pointer Calculator
Explore Hiscox’s eccentric gear train with linked elliptical and circular gear animations. Calculate signed shaft speeds and reversing pointer travel.
Doubling Shaft Revolutions: Historical Six-Bevel Train and Motion Calculator
Follow a six-bevel gear train with a reversing sleeve and moving carrier. Compare input, sleeve, planet and output revolutions for the illustrated connections.
Doubling the Length of a Crank Stroke: How the Rack-and-Pinion Mechanism Works
Explore a crank-driven rack stroke doubler. Set crank radius, rod length and pinion size to calculate output stroke, live speed and sampled peak speed.
Doubling Stroke Length via Rack and Pinion: How the 2:1 Motion Multiplier Mechanism Works
Explore a travelling pinion between fixed and moving racks. Calculate doubled stroke and speed, ideal output force, pinion rotation and transmitted power.
Doubling Speed with Equal-diameter Bevel Gears (six-gear): How the Mechanism Works, Parts & Uses
Explore six equal bevel gears, a reversing sleeve and moving carrier. Calculate the three-to-one output for the illustrated shaft connections.
Doubling a Revolution on Same Shaft: How the Coaxial 1:2 Gear Mechanism Works
Explore Entwistle’s coaxial bevel speed doubler. A moving pinion carrier and fixed side gear produce two output turns per input turn.
Disk-wheel and Spur Gear (rotary at Right Angles): How the Right-Angle Mechanism Works
Explore a single-start face-spiral disk driving a perpendicular spur wheel. Calculate reduction, output speed and steady torque and power-loss estimates.
Differential Speed: Fixed-Idler Gearing and Coaxial Counter-Rotation
Explore a fixed-idler gear train with coaxial counter-rotation. Calculate the required ring tooth count, signed idler and output speeds, and reduction ratio.
Differential Screw and Gear Movement: How It Works, Diagram, Formula, and Precision Uses
Explore a gear-driven differential feed with a rotating screw and nut. Calculate signed travel from one screw lead and two gear ratios.
Differential Motions Explained: How a Bevel Differential Works, Parts, Formula, and Uses
Explore an open bevel differential. Calculate output speeds, equal ideal side torques and signed powers from carrier speed, transmitted torque and speed difference.