Torque & Speed
Torque and speed trade off — gear ratios are how you buy one with the other.
01
The Trade-Off
You can have torque or speed — a transmission trades between them.
- Torque and speed are inversely related: gain one, lose the other.
- It's conservation of energy — slow it down, it pushes harder.
- Mechanical advantage is the ratio of output to input.
02
Reading a Gear Ratio
A ratio is written n1:n2.
- 4:1 means 4x the torque and 1/4 the speed out.
- Reductions (big numbers) give torque for arms: 30:1 to 200:1.
- Upductions (up to 1:2) give speed for shooters and rollers.
FUSION 360 · SCREENSHOT
add → course-shots/1b-04/1.png
FIG 1
Key idea
Need more of both? Add another motor.
Ratios trade; motors add.
Recap
TORQUE & SPEED
- Torque and speed trade inversely
- Ratio n1:n2 — e.g. 4:1 = 4x torque, 1/4 speed
- Big reductions for arms; upductions for shooters
- More of both? Add motors
Your Task
Build this
- Model what this lesson covers in Fusion 360.
- Use the AltSkripts tools where they apply.
- Save it with a clear name.
How to submit
- In Fusion: Share → Public Link → Copy.
- Paste the link below.
- A coach reviews it in AltHub.