axial center; central axis
Technical term used in engineering, mechanics, and geometry to refer to the central line around which something rotates or is symmetrically arranged.
If the axial center of this part shifts, the balance of the entire machine will be lost.
The position of the central axis is precisely indicated on the blueprint.
Standard kanji spelling for 'axial center'.
Alternate spelling using 芯 (core); less common but seen in technical contexts.
Compound of 軸 (axis) and 心 (center, core). The spelling 軸芯 uses 芯 (core, wick) with a similar meaning.