iLoveDXF

Gear Generator

Design an involute spur gear and export a precise DXF or SVG for laser cutting, CNC, or 3D printing — entirely in your browser.

Pitch Ø = module × teeth. Two gears mesh when they share a module and pressure angle.

Free, no sign-in. The gear is generated in your browser — nothing is uploaded.

Teeth

24

Pitch Ø

48 mm

Outside Ø

52 mm

Root Ø

43 mm

How it helps

True involute tooth profile from module, teeth, pressure angle, and bore.
Live preview with pitch, outside, and root diameters as you type.
Export a clean DXF or SVG ready for laser, CNC, or 3D printing.
Runs fully in your browser — free, no sign-in, nothing uploaded.

Best practices

  • - Two gears mesh when they share the same module and pressure angle.
  • - Use 20° pressure angle and 17+ teeth to avoid undercutting on small gears.
  • - Pitch diameter = module × teeth; centre distance between two gears = (z₁ + z₂) × module ÷ 2.
  • - Cut a test gear first and confirm the bore fits your shaft before cutting a set.

Limitations

  • - It generates external involute spur gears — not helical, bevel, worm, or internal gears yet.
  • - No kerf/tool-diameter compensation; offset in CAD or your cutter settings if needed.
  • - Profile shift, root fillets, and backlash tuning are not exposed in this version.

FAQ

What is the module?

Module is the size of each tooth: pitch diameter divided by the number of teeth. Two gears mesh when they have the same module and pressure angle. (In imperial, this maps to diametral pitch.)

Will my gears mesh?

Yes, as long as both gears use the same module and pressure angle. The centre distance between them is (teeth₁ + teeth₂) × module ÷ 2.

How many teeth should I use?

At a 20° pressure angle, use about 17 teeth or more to avoid undercutting. Fewer teeth still work for many laser/3D-print projects but the profile is approximate.

What can I cut it on?

Export DXF for laser cutters, CNC routers, and plasma, or SVG for vector tools. The DXF imports into LightBurn, Fusion, Inkscape, and most CAD/CAM software.

Is anything uploaded?

No. The gear is generated entirely in your browser and the tool is free with no sign-in.

DXF to G-code DXF Viewer Image to DXF SVG to Animation