Several tools and software are available for generating gears in STL, including:
For users who need extensive gear variety in one package, the (available on MakerWorld and 3dgo.app) is a highly polished solution. Based on the powerful BOSL2 library and refined over 10 versions, it supports seven major gear types: spur/helical, herringbone, internal ring, crown, bevel, worm/worm gear, and rack. Custom helix angles use industrial standard “transverse module” calculations, a chamfering algorithm reduces friction, adjustable boss features allow hub customization, and a rich variety of shaft holes supports round, hex (nut‑trapping), D‑shaft, and double‑flat (double‑D) configurations—perfect for stepper motors. The interface is available in Chinese with clearly grouped parameters. gear+generator+stl
: A rectangular cutout to prevent the gear from slipping on the shaft. Several tools and software are available for generating
You do not need to be a CAD expert to design gears. Several free and premium tools specialize in generating 3D-printable gear models. 1. Web-Based Gear Generators (No Installation Required) The interface is available in Chinese with clearly
By using a generator instead of drawing gears manually, you ensure that the —the specific curve of the gear teeth—is mathematically correct for smooth rotation and minimal wear. Top Gear Generator Tools for STL Export
Re-generate the STL with a "D-shaped" bore or model a pocket for a hex nut and set screw.
Depending on your workflow and design experience, several free and premium tools can output high-quality gear STLs. 1. Web-Based Generators (No Installation Required)