Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. [tool and equipment components]
7. [grinding and milling equipment components]

Anotations

Scope note:

Disks composed of or coated with abrasive material, mounted in various ways to motors that spin at high speed. Objects are brought into contact with the spinning surface of these wheels to be ground down, smoothed, or cut.