Timing Belt Pulley Generator
Design parametric pulleys in your browser — no install required.
A free web-based tool that generates accurate timing belt pulley geometry from ISO and ANSI standard formulas. Enter your belt profile, tooth count, and dimensions — export production-ready 2D drawings and 3D models in seconds.
See It in Action
Export Formats
SVG & DXF — 2D
Laser cutting, waterjet, and CNC profiling. Clean vector output matched to your belt standard.
STL — 3D Print
Watertight mesh with optional spokes, hub boss, flanges, set-screw holes, and keyways.
STEP — CAD Import
Full B-rep solid via OpenCASCADE. Imports cleanly into Fusion 360, SolidWorks, FreeCAD, and others.
PNG — Preview
High-resolution profile preview for documentation and inspection.
Belt Profile Support
| Family | Profiles | Standard |
|---|---|---|
| HTD | 3M, 5M, 8M, 14M | ISO 13050 |
| GT2 / GT3 | 2GT, 3GT, 5GT, 8MGT | Gates specification |
| STD / S-series | S2M, S3M, S5M, S8M, S14M | ISO 17396 |
| RPP | RPP3M, RPP5M, RPP8M, RPP14M | ISO 17396 |
| Imperial | MXL, XXL, XL, L, H, XH, XXH | ANSI / ISO 5294 |
| T-series | T2.5, T5, T10, T20 | ISO 17396 |
| AT-series | AT3, AT5, AT10, AT20 | ISO 17396 |
Key Features
Two-Pulley Drive Calculator
Enter centre distance or tooth count — the tool calculates belt length, drive ratio, and corrected centre distance.
Advanced Profile Tuning
Fine-tune tooth clearance and backlash for special requirements — tighter tolerances for high positional accuracy, or looser fits for high-speed and high-temperature applications.
Hub & Bore Options
Set bore diameter, hub OD, hub height, set-screw count, captured-nut pockets, and keyway dimensions.
Spoked Pulleys
Reduce weight and material with configurable spoke count, width, hub OD, rim depth, and fillets.
Flanges
Generate 3D-printable or metal-spec flanges with optional support ribs and nub locating features.
Upcoming CAD Software Integration
Direct import into your CAD environment — no manual file handling.
Planned platforms: Fusion 360, FreeCAD, Onshape, SolidWorks, AutoCAD.
Precise Geometry
Every tooth profile is computed from the published ISO and ANSI standard formulas — curvilinear HTD/GT flanks, parabolic RPP flanks, trapezoidal Imperial and T-series flanks, and S-series tip crush handling. Geometry scales correctly with tooth count; no interpolation or lookup tables.
Launch Web App
Free beta — no account required — runs in your browser.
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