Even if you devote 2 hrs to this lecture but understand each and every point clearly, honestly it's a time well utilized. It took me hours to fully understand this stuff and i repeatedly watched segments of this video but now the entire tool geometry concept is crystal clear to me
The saddest part is at 30 min. After getting a very a clear and lucid explanation of how to achieve the change gear ratio, I thought I have cut the gear. But then Sir said, we don't use this mechanism to cut gear 🤕