On a disk with a diameter of three centimeters, eight teeth are created, forming a relatively rough gear—this should be achievable, right?
Then, on a disk with a diameter of three meters, eight hundred teeth are made, this should also be doable, right?
Connecting them together, the teeth of both will always interlock with each other, never making an error.
This level of precision should be relatively easy to achieve.
Thus, the mechanism of the small gear driving the large gear is completed.
So, the time difference for each cycle of hand-cranking the small gear does not exceed one second, translating to the large gear as not exceeding 0.01 seconds.
The large gear rotates at a constant speed.
Thus, hand-cranking one hundred turns before the large gear completes a single rotation, the bolt rotates once, and the tool engraves a spiral line on it.
With good steel, machining gears becomes very simple.
