# Calculating compound gear ratios

Calculating compound gear ratios

How to work out good tooth counts to come up with a desired gear ratio for multi-stage gearing. http://woodgears.ca/gear/ratio.html

The gear generator program I used is one I wrote, for sale on my website: http://woodgears.ca/gear

4:30 here you go

I have to learn this in my engineering class

"Boring educational content"

¡Muy bueno!!!

Algunos creen que el engranaje se hace solo por arte de magia…🙂🙂🙂

Thanks

for your help

could you implement a planetary gear set?

an example: G = 3:15 ; get this to 1:something; so divide by 3 -> 1:5. 5 = 2.5 x 2; then invert this equation -> 1/5 = 1/2.5 x 1/2. There’s your 2 gear ratios for a compound system.

I am not ashamed to admit I am so lost. I was with you with 1:10 then the rest got away from me.

could just do a worm gear and a ten tooth gear, worm is 1 tooth, so you can get a 1:10 gear ratio

you can always tell when someone hasn’t been to college.

in the formula used in the documentation of the website you say you are using 7 teeth for the smaller gear however the final end result the smaller gear has 8 teeth, not 7 witch left me puzzled a bit

This is absolutely fascinating to me.

Would your gear drawing work as well in metal or does the tooth shape need to be different? Thanks for a great video.

2:14 where did the 7:77 gear come in from?

how did you get 1:3 and 3:10? Why did you multiple 1:3 by 7 and multiplied 3:10 by 3?

I honestly didn’t understand it. You just did some calculations and you didn’t explain what or why you did them. I’m a beginner so I don’t quite understand everything yet…

oky !

Nice pen

Hello I need help i have a motor 3 rpm but I need 300 rpm how can I convert it please tell me sir?

Dont quite understand where you got some of the numbers from but hopefully I’ll learn some day.

10 : 30 and 8 : 32 ratios would be much much better. and there would not be a time accuracy error.

Thank you so much for this. I am considering creating my own you tube channel. If I use anything from this I will be sure to commend you and so fourth. With your permission.

bother me how the cut aren’t perfect. 5:00

it took me a while, but i finally got it

thankyou for making this video 😀

Not boring at all, very interesting!!

can any one tell me how to calculate the ratio for the hands that counts the seconds please

Think the video could have used a little more explanation on why exactly you were doing what you were doing mathematically but I eventually got! Thanks for the video!!!

Great video, thank you posting. This helps me understand much better.

Suppose you put two gear setups on a bicycle. Would it take the same amount of torque to accelerate each one since they are the same hear ratio?

Need to explain ur math more

(Driven / driver) x (driven / driver). There. Done in 20 seconds.

Possibly ‘again’, thank you for this. I sometimes use my kitchen cupboards as a white board to sketch Ideas while I am making a cuppa. Then I remembered this video, I can go wash all the lunatic scribblings off now.

Plz, if I want 90:1 gear ratio.. How to calculate it?

Well made.

Thanks for the help, Revision? Done! Hotel, Trivago!

Nice pack of informations thanks

hi your video is very interesting i have a bar with teeth carved into it how do i find out what size of tooth i need i looked for a sprocket but no one has it i can send you a picture of it with the measurements on it

When making the clock gears, instead of trying to make gears “roughly” the sqrt(12), why not just made them 1:3 and 1:4 so it’s exact?

what about 0.05 : 1 ? example … 1 need that a gear rotates 0.05 while the other makes a complete rotation

Welp. Time to buy a 3D printer *rip my wallet*

I got very bored and now I have a bunch of gear LEGO’s

ஒரு மன்னும் புரியலே.

4:30 your welcome

this time have 3d printer 🙂

I literally came here just for the "boring content" lol.

0:52 why do you multiply by 7 and then the other ratio by 3?

can someone please explain to me 0:35 i don’t understand how he changed 1;2 to 1;3 and how he changed 1;5 to 3;10

Hi, such clean work. I have some questions, ill start with:

this Gear Generator program is the only software for the hear related matters, or there are some others too?

thank you

I had no idea you’d actually make the gears. That was amazing

Trying to figure out a 365 to 1

Very good. Congratulations!