Gear
Speed and torque ratios
Machine elements and mechanisms
Move machines to see how they work
Gears, pulleys, cams, hydraulics, robot arms. Change the numbers, watch the mechanism respond, and see the formula behind it.
- 12 interactive modes
- 74 languages
- No sign-up needed
12 mechanisms you can touch
Every mode runs live. Drag a slider and the machine responds immediately.
Transmit power
Belt Drive
Speed by pulley ratio
Planetary Gear
Shift by holding a part
Multiply force
Pulley
Multiply force with rope
Lever
Balance of moments
Screw
Torque into thrust
Hydraulic
Pascal's principle
Convert motion
Linkage
Four-bar paths
Cam
Rotation into lift
Crank
Rotary to back-and-forth
Geneva Drive
Steady spin to stop-and-go
Robot Arm
Forward kinematics
How it works
Choose a mechanism
Pick from power transmission, force multiplication or motion conversion.
Change the numbers
Adjust tooth counts, lengths, loads and speeds, and watch the result as it moves.
Read the reason
The explanation sheet shows the formula and where the mechanism is used in real machines.
Made for learning
Live simulation
Smooth animation shows the moving parts and key values together.
Real formulas
Speed ratios, moments, Pascal's principle and kinematics, explained simply.
Works offline
Everything except ads works without a connection.
Phone and tablet
Layouts fit large screens, landscape, and light or dark themes.
Start moving machines
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