Free No account needed

Timing Pulley and Sprocket Generator (OwlCAD)

A GT2 or HTD timing pulley or an ANSI #25 to #60 chain sprocket, picked by standard name

Timing Pulley and Sprocket Generator (OwlCAD) is a free browser tool for printing a pulley or sprocket that fits the belt or chain you already have. The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription. Exports STL and 3MF; no account needed. Last checked 16 October 2026.

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At a glance

Price: The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription
Runs on: Browser
Exports: STL, 3MF
Multicolor: No, single color
Account: Not needed
Open source: No
Skill level: Easy: a few settings to tune
Best for: Printing a pulley or sprocket that fits the belt or chain you already have
Selling prints: Allowed OwlCAD's terms include commercial use on every plan, the free tier included: you may sell prints, sell or license the files and use them in a product, with no royalty and no attribution required.
How we checked: Opened the generator Customizer opened in a browser with no account: the default GT2 pulley with flanges rendered in 3D with all settings; pricing and terms read
Checked by: Mike Janssen
Last checked: 16 October 2026

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Sources: Pulley and sprocket customizer, OwlCAD pricing, OwlCAD terms (checked 16 October 2026)

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About this generator

The Timing Pulley and Sprocket Generator is one of the free customizers in OwlCAD, a browser-based parametric CAD tool. It makes either a timing-belt pulley (GT2-2M, GT2-3M, GT2-5M or HTD-3M, with optional guide flanges) or a roller-chain sprocket (ANSI #25 to #60).

You pick the standard by name, not by pitch, because pitch alone identifies neither a belt nor a chain: #40 and #41 chain both have a 12.7 mm pitch but different rollers. The name sets the pitch, outside diameter, groove depth and roller seat together. You then set the tooth count (8 to 120), the bore and the width. It pairs with OwlCAD's timing belt generator at the same profile.

It runs in the browser with no account and costs nothing; only OwlCAD's AI features are paid. It is one of 35 free OwlCAD customizers, and you can open the result in the full editor if you want to change more. Its terms give you full commercial rights to what you make, the free plan included.