Category
Gears
6 articles in this category.
Harmonic Drives: Zero Backlash from a Flexing Cup of Metal
The harmonic drive achieves enormous reduction with literally zero backlash by flexing a thin metal cup into a travelling wave. See how robot joints get their ghost-smooth precision.
GearsHelical vs Spur Gears: Why Angled Teeth Run Quiet
Angle the teeth of a spur gear and everything changes: the mesh becomes gradual, the noise becomes a hum, and a new force appears. See the comparison in motion.
GearsRack and Pinion: How Rotary Motion Becomes Perfectly Straight
The rack and pinion converts spinning shafts into dead-straight linear motion — and back again. See how steering wheels, 3D printers and CNC machines all rely on this simplest of gear pairs.
GearsWorm Drives: The Gear That Turns Rotation 90 Degrees and Holds Its Ground
A worm drive trades speed for brute reduction in one compact stage — and it can be made impossible to back-drive. See how a screw turns a wheel, and why elevators trust it.
GearsPlanetary Gearsets: One Input, Many Personalities
A planetary gearset packs sun, planets, ring and carrier into one compact unit — and produces wildly different gear ratios depending on which part you hold still. Watch the carrier dance in the animation.
GearsHow Spur Gears Work: Teeth, Pitch Circles and the Grammar of Rotation
Spur gears are the simplest gears ever invented — and the foundation of every gear system. See how meshing teeth transfer rotation, why gear ratio matters, and what the pitch circle really means.