Home▸Engineering & Materials▸Gear Train — Ratios, Torque & Speed (2D)

⚙️ Gear Train — Ratios, Torque & Speed (2D)

2D top-down gear train simulator: build 2-4 meshing spur gears, set tooth counts and input RPM, and watch gear ratio, torque multiplication and alternating rotation directions in real time.

Engineering & Materials2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

About the 2D Gear Train Simulator

This is the 2D side-view companion to the 3D gear train simulation: the classic mechanical-engineering-textbook diagram of a line of two to four meshing spur gears, drawn flat with real involute-style teeth. Each gear meshes with its neighbour, so ω_out/ω_in = −N_in/N_out: the minus sign means meshing gears spin in opposite directions, alternating clockwise and counter-clockwise down the chain, exactly as the arrows show.

Set the gear count, each gear's tooth count, input RPM and input torque, or tie gears B and C into a compound gear on a shared shaft. The live readout reports per-gear RPM, torque and rotation direction plus the overall ratio and torque multiplication — the same trade-off between speed and force found in clocks, gearboxes, drills and bicycle drivetrains.

⚙ Under the hood

Build a 2D side-view train of two to four meshing spur gears, set tooth counts and input RPM, and watch gear ratio, torque multiplication and alternating rotation direction update live.

gearsmechanicstorqueengineeringrotation2D

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install