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Pricing
Designing a gear pair costs nothing. You pay only for the STEP files, and then once: a month of unlimited exports, no subscription.
Free
$0
Nothing to pay, no card
- Straight and spiral bevel, spur and helical gear pairs
- The 3D preview, the axial and tooth sections
- The main dimensions to ISO 23509 and ISO 21771: diameters, pitch angle, cone or centre distance
- Strength rating to ISO 10300 and ISO 6336
Unlimited month
$2.99 once
One calendar month from the day you buy
- Everything that is free, and
- Unlimited STEP exports: pinion, wheel and the assembled pair
- Every dimension and the inspection data
- The PDF summary report: dimensions, safety factors and loads
- STL and the CMM point grid on request, mm or inch
- Every gear type on the site, the experimental hypoid too
- No subscription: nothing renews by itself
How it works
- Sign in on this site with your Google account.
- Buy the month on Buy Me a Coffee. At checkout, give the email address you sign in with here - the month goes to that account, usually within a minute, and a confirmation email follows.
- Press Generate STEP. One export builds at a time: each holds the server for a minute or more, so the next starts when the last is done.
Questions
- What happens when the month ends?
- Nothing is charged. The STEP button and the PDF report ask for a new month; designing, the preview, the main dimensions and the rating stay free.
- I buy a second month while one is running.
- It adds on at the end of the first, so no day is lost.
- I gave a different email at checkout.
- Write to [email protected] and we move the month to the right account.
Can't afford it? If $2.99 is really out of reach for you, email [email protected] and tell us what you are working on.