Quote Originally Posted by routercnc View Post
I ‘invested’ time writing a spreadsheet that works out the key geometry for any HTD 5 gear size you want. Watch me never need it again !
The rather splendid 'Gearotic' software from Art Fennerty will design many common styles of timing pulley for you, along with gears, gear trains, sprockets, ratchets, clock escapements and more wonders than you could ever imagine. All for one modest updates-for-life payment.

https://www.gear2motion.com/

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