Ferrule
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A ferrule is a circular clamp used to hold together and attach fibers, wires or posts.
Examples of ferrules:
- In a brush or quill ferrule binds the bristles or hair to the handle.
- The metal ring which is crimped to hold the eraser in place on pencils with an attached eraser.
- The metal ring which holds a chisel blade's tang to the handle.
- The metal cap put on the end of a bicycle's cable housing.
- In fiber optic terminations, glass or plastic fibers are bonded to precision ferrules and polished for spliting or connecting two fibers together.
- In restorative dentistry: margin of a cast crown that stabilizes root-canal treated teeth