Buying guide
Lead Screw vs Timing Belt Drive: Which Is Better for Your Axis?
A practical comparison of speed, accuracy, load and cost for CNC, 3D printer and automation axes.
Both turn a motor into linear motion, but they suit different jobs. Belts are fast and long; screws are strong and precise.
Side by side
| Timing belt | Lead screw | |
|---|---|---|
| Speed | High | Limited by screw whip at long lengths |
| Travel length | Long axes (X, Y, gantries) | Short to medium |
| Holding force | None; the axis can move when power is off | Good, especially with a small lead |
| Thrust | Lower | High |
| Cost | Low | Moderate |
Typical choices
- 3D printer X and Y: GT2 belts and pulleys for speed.
- Z axis: lead screw for load and holding position.
- Large CNC gantry: belts or rack drives for long travel, screws where stiffness matters.
Shop: timing belts · GT2 pulleys · lead screws · read also how to choose a pulley
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