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ANSI & ISO standards
ANSI B29.1M tooth profiles for #25–#100 and ISO/DIN 8187 metric 05B–20B chains, with correct seating arcs and tip radii.
Free · Browser-based · No sign-up
Design precision sprockets & gears in your browser.
Garari Maker turns chain specs into CNC/laser-ready DXF and 3D-printable STL files — with a live 2D/3D preview and instant weight estimate. No CAD seat required.
What is Garari Maker? Garari (گراری) is the Urdu word for sprocket. Garari Maker is a free, open-source web app from Sufi Engineering that lets machinists, makers, and engineering students design roller-chain sprockets and involute spur gears and export production-ready files — entirely in the browser, with nothing to install.
Everything you need
From chain number to cut file in minutes
Accurate geometry, real-time feedback, and the export formats your shop actually uses.
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2D & 3D preview
A live SVG drawing and an interactive, extruded 3D model that respects your real plate thickness.
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DXF, STL, PNG export
Layered DXF for CNC/laser, STL for 3D printing, and image export. Batch-nest multiple parts on one sheet.
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Instant weight estimate
Net area, volume, and weight across 9 materials — mild & stainless steel, aluminum, brass, nylon and more.
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Real shaft features
Bore, hub, multi-strand, set-screw, keyway (cut as one clean keyhole), bolt holes, and lightening cutouts.
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Bilingual & offline
Full English, Urdu & Arabic with RTL support, mm/in units, light/dark themes, and offline PWA install.
Three tools, one app
More than a sprocket maker
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Sprocket designer
Full roller-chain sprocket builder with every shaft feature, weight estimate, and laser-ready output.
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Spur gear generator
Involute spur gears in the ISO module system — set module, teeth, pressure angle and bore, then export DXF.
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Drive calculator
Enter two sprockets and input RPM to get the ratio, output speed, chain length in links, and center distance.
Simple workflow
How it works
Pick your chain & teeth
Choose an ANSI or ISO chain and the number of teeth. Dimensions update instantly.
Add features
Set the bore, hub, keyway, mounting holes and lightening — preview in 2D and 3D as you go.
Export & cut
Download a clean, layered DXF or STL and send it straight to your laser, CNC, or 3D printer.
Reference
Supported chain standards
Pitch is the distance between roller centers. Values follow the ANSI B29.1 and ISO 606 / DIN 8187 standards.
| Standard | Chain | Pitch | Roller ⌀ |
|---|---|---|---|
| ANSI | #25 | 6.35 mm (¼″) | 3.18 mm |
| ANSI | #40 | 12.70 mm (½″) | 7.92 mm |
| ANSI | #60 | 19.05 mm (¾″) | 11.91 mm |
| ANSI | #80 | 25.40 mm (1″) | 15.88 mm |
| ISO / DIN 8187 | 08B | 12.70 mm | 8.51 mm |
| ISO / DIN 8187 | 12B | 19.05 mm | 12.07 mm |
| ISO / DIN 8187 | 16B | 25.40 mm | 15.88 mm |
Questions
Frequently asked questions
Is Garari Maker really free?
Yes — it is completely free and runs entirely in your browser. No sign-up, no watermark, and no limit on downloads. The project is open source under the MIT license.
Which chain standards are supported?
Both ANSI imperial chains (#25, #35, #40, #50, #60, #80, #100) and ISO 606 / DIN 8187 metric “B” series chains (05B–20B), which also match the British Standard.
What can I export?
Layered DXF files for CNC and laser cutting, STL for 3D printing, and PNG/SVG images. A batch option nests several parts onto a single DXF sheet, and the keyway is exported as one clean closed contour so the laser never double-cuts.
Are the tooth profiles manufacturing-accurate?
Sprocket teeth follow the ANSI B29.1M standard with proper seating arcs, working flanks, and tip radii from chain pitch and roller diameter. Gears use a standard involute profile in the ISO module system.
Do I need to install anything?
No. It works in any modern browser. You can optionally install it as an offline app (PWA) so it keeps working in the workshop without a connection.
Can Sufi Engineering manufacture my design?
Yes. From the app you can send your full specification straight to Sufi Engineering via WhatsApp or email to have the part CNC-machined or laser-cut and shipped to you.
Ready to make your sprocket?
Open the designer, dial in your chain and teeth, and download a cut-ready file in minutes.
⚙️ Launch Garari Maker