- The rewinding roller is air differential shaft （Goldenrod, or similar）, slip force can be adjusted automatically to accommodate thickness variety of the material for multi-roller slitting.
- A slot for a key in the hub or shaft of a wheel.
- Flexibility, as in the shaft of a golf club.
- In rotating, the shaft splashes oil up into the bearings.
- A framework to support or strengthen a mine or shaft.
- A shaft on which a working tool is mounted, as in a dental drill.
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