A lathe chuck, which has three simultaneously moving, jaws that are shaped to permit gripping the item from both the inside and the outside.
Chute
An inclined or vertical metal trough or passage down which something may be slid or dropped, such as concrete from a truck to the forms.
Cinder
Ashes from burning coal or wood.
Cinder block
Block, which is used in construction and made of ash and cement.
Cinder fill
Cinders used below the basement and around the foundation to promote drainage.
Cinquefoil
A circular design made of five converging lobes, giving the appearance of a flower with petals
Cipolin
Italian marble with alternating streaks or layers of color, often green and white.
Circa
Approximate date.
Circle
A plane figure bounded by a single curved line every point of which is equally distant from the point at the center of the figure. A circle shaped plate, which hold a transit telescope.
Circle cutter
This tool with a center shaft in which a drill bit is mounted with an adjustable cutter blade mounted on an adjustable arm perpendicular to the center shaft is used to cut a wide range of diameters. The speed of the cutting must be closely controlled with the rotating cutter blade being an off-center out of balance mass, which is difficult to guide. The center shaft is mounted in a drill motor and the cutter scribes a circle on the work and cuts its way through the work as the center shaft rotates. The cutting blade is often carbide tipped to cut through a wide variety of materials.
