Q&A 1 Gear trains basic principles, turning small (tiny) diameters and thread pitch calculations

[@MrPragmaticLee]

I usually start my Saturday morning (after doing my chores) by coming to the Tin Barn with a big cup of coffee and spending some time catching up on videos posted by my friends on KZbin. What an absolute joy it was to watch this video this morning. You did an excellent job on explaining all three questions. I guess I do still have one question though. In a drive train, if I understand correctly, by increasing your speed, you lose power or torque. If that is so, do you get that power/torque back when you decrease your speed through subsequent gears? In your 2nd example where you wind up with a 1:1 speed, is the power/torque at the driven gear the same as at the drive gear? Thanks again so much for taking time to put this together.

[@THATLAZYMACHINIST]

Hi Lee! All the gears between the two end gears are idler gears and the torque would be calculated as if they didn't exist BUT!!! The idler gears have mass and there is friction between them, unless the gears are massive the forces aren't huge but they must be taken into consideration. That is why chains (or belts) are preferred for large gaps.

[@MrPragmaticLee]

Great! Thanks again for teaching this old dog some new stuff!

[@katgartner9018]

hi I have seen the video on squaring a block and got hooked . Thank you so much for making the videos and great job explaining I will start at the beginning and learn . Thank you again

[@ProfRonconi]

Beautifully executed and explained. Thank you!

[@jimmilne19]

Ha! I heard that! And, if I heard it I must have been not only awake, but attentive. However, it was nice that you awakened me the last time, because I truly don't want to miss anything - including sleep - and the balance is sometimes hard to manage. Love your programs. This is both and entertaining and rewarding format (the Q&A format). I hope you keep up the Q&A program. Nice.

[@scottthornton9237]

Hi Marc, First things first; Thank you for the great lessons, I would give my eye teeth to have been one of your students in college. I thought i understood threads and pitch. (well now i do). I did not know until this video the real difference in the way threads are described in the s.a.e. vs metric. It just goes to show, you sir, can teach us old dogs new tricks! I thank you for educating!

[@THATLAZYMACHINIST]

Thanks Scott! It's all for fun and it's very nice to know that my little retirement project is helping others. Marc

[@Gkuljian]

That half cutting diameter is a neat trick.

[@THATLAZYMACHINIST]

It's a trick I came up with some years ago. It's not generally known but I guess that if enough people watch the video it could catch on? It's just another way to make machining easier.Thanks for watching and for taking the time to comment, Marc

[@Daledavispratt]

Enjoyed, and learned! Can't beat that! Thanks. :-)

[@BMWDCK75]

Great video the half cutting diameter really got my attention. Half hard brass well that is the question is that like 360? Gear ratio's very well done.

[@JDLuke]

That tip on setting the zero was even better than the dog