Calculating gear ratios?

[CNCadmin]

This is to benefit myself and others. What is the formula for calculating gear ratios? Also for calculation the inverse of pie?

[HuFlungDung]

ratio of a compound gear set = (product of driver gears)/(product of driven gears)

inverse of Pi = 1/Pi

[Al_The_Man]

On a related topic, if you require information on ratio of timing belts, including the centre distance calculator etc , Stock Drive Products have a CD called the 'World of Timing belts' they may have it for download now.
BTW the first half of their free gear catalogues read like engineering manuals on gears.
Al

[Dylwad]

Originally Posted by Al_The_Man On a related topic, if you require information on ratio of timing belts, including the centre distance calculator etc , Stock Drive Products have a CD called the 'World of Timing belts' they may have it for download now. BTW the first half of their free gear catalogues read like engineering manuals on gears. Al

Actually the center distance calculator etc can be found on SDP-SI's homepage. And yes, the catalogs are a breath of fresh air arent they?

Dylan

[CNCadmin]

That's OK, but the site would be a lot better if you could put in the ratio and it would give you all the combinations of pulleys that can be used. That page is really just for calculation the belt length for a give pulley combinations. When you're trying to get a gear ration based on pie for a belt driven system it's takes a little bit more work.

I found this bit of info- http://www.sdp-si.com/D260/PDF/part1.pdf

[arvidb]

Originally Posted by CNCadmin *snip* What is /.../ the inverse of pie?

That would be carrots. (Sorry just couldn't resist it .)

Arvid

[Ito-Brazil]

Hey Admin: Nice document! Thank you!

[sumit.ghatak]

where can i find the Gear ratio calculator software??????

[Mike Everman]

Originally Posted by sumit.ghatak where can i find the Gear ratio calculator software??????

Gear ratio for what?

[sumit.ghatak]

for all kind of gears I need the gear ratio calculator

[Mike Everman]

Originally Posted by sumit.ghatak for all kind of gears I need the gear ratio calculator

Can you be more specific?
A gear ratio is number of teeth over number of teeth. Asking for a gear ratio calculator is like asking for triangle point counting software.
I am not trying to be insulting. ;-) I'm sure it is a language thing.
Have you followed the links below? What are you trying to do?

[sumit.ghatak]

Hi there Mike.
you see ,I am no Engineer my self. the gear ratio calculator I need is for my father ,he is an engineer himself but he is currently out of station,and it is very difficult for me to arrange the software for him. well let me tell you some thing....the software comes with Dr. Gears website I have tried it, but it seems to a trial version and I need A full version ,,,now my request is can you tell me where can I find the full version ,

thanks buddy