Thickness 0.2mm and 0.3mm, they look very thin.
However, they are belt material.
In other words, they are tensile to stand repeated rotations.
We need a lot of force to bend 0.3mm -thick belt with our hands.
The picture below shows how the belt material bends by its own weight.
Thickness is , from the front, 0.05, 0.08, 0.1, 0.15, 0.2, and 0.3mm.
|Various thickness of steel metal belt|
The front on is 0.05mm thick, thinner than human hair (0.07mm).
Yet it is spring type and looks arc. This way steel metal belts are rigid.
Steel belt video: http://www.youtube.com/results?search_query=dymcooverseas&sm=12
DYMCO, LTD URL http://www.steelbelt.jp