If good quality steel is used, it will be quite robust.
It needs to be stretched over one meter long.
Ma Lin thought again about the problem of carving screws.
If this rod is two meters long, can it still remain relatively straight and sturdy?
If one end is driven to rotate, can it cause the other end to follow along?
Is the rotational force strong enough?
Will the rod deform during rotation?
He felt that making it two meters long wasn't a good idea.
Perhaps there's another feasible approach.
The end being stretched is connected to a thick stick.
The side of the thick stick has spiral grooves.
The thick stick goes through an opening fixed with a tool, with the tool embedded in the groove.
Pulling the thick stick, the tool advances along the groove, forcing the thick stick to rotate.
The thick stick drives the pull knife to rotate.
But then another problem arises.
This rotation must be very precise.
