Helical gear
Angled teeth engage gradually instead of all at once, so it runs quieter and stronger than a spur gear of the same size.
Loading viewer…
Dimensions
2
20
8 mm
5 mm
20°
No account, no credit. Want it in 3MF or STEP, or a shape that isn't here? Describe it instead.
What you can change
- Module
- 0.5–5 · default 2
- Teeth
- 8–60 · default 20
- Thickness
- 3–40 mm · default 8 mm
- Bore
- 0–30 mm · default 5 mm
- Helix angle
- 5–40° · default 20°
This part is generated from a hand-written, print-tested OpenSCAD module — the same numbers always produce the same geometry. It is not an AI guess, and it does not cost a credit. Before a load-bearing or fit-critical print, check it against our design guide for wall thickness, overhangs and orientation.
Print notes for this part
- A single helical gear pushes along its own axis under load (axial thrust) — plan a thrust bearing or a shoulder to react that force, or use the herringbone template instead if the mount can't take it.
- Higher helix angle meshes more smoothly and quietly but adds overhang on the tooth flanks; past roughly 30° most slicers want to add support material there.
- Meshing gears must share module and pressure angle, with opposite-hand helix — module alone does not guarantee a mesh the way it does for a plain spur gear.
More guides
Free Parametric TemplatesProven starters — brackets, knobs, gears, boxes. Set the dimensions and download the STL, no account.AI STL GeneratorDescribe a part in plain words and get a validated, printable STL/3MF/STEP file.Photo to 3D Print FileTurn a photo — a portrait for a lithophane, or a broken part — into a printable file.Replace a Broken PartPhotograph a snapped bracket, clip, or gear and get a printable replacement.Image to 3D PrintSkip the Inkscape-to-CAD vector pipeline — turn a JPG or PNG into a printable file directly.AI Bracket & Mount GeneratorDescribe a custom bracket, mount, or enclosure and get a file that fits.3D Printing Without CADFor makers who already print and slice, but don't want to learn CAD for one-off parts.Fix Non-Manifold EdgesWhat non-manifold geometry is, how to repair it in Blender, and how to skip the repair step.Design for 3D Printing (DfAM)Watertight is not enough — wall thickness, overhangs, fits, and orientation for AI-generated STLs.AI Miniature GeneratorDescribe a D&D or tabletop figure and get a printable STL — no ZBrush or Blender.What Is an STL File?What STL stores, why printers use it, how it differs from OBJ/STEP, and how Formo builds one from text.Free AI 3D Generators ComparedHands-on July 2026 look at which free AI 3D tools actually let you download a printable file.