Tapered shank, conical tip tool that is used in the tailstock of a lathe and holds the work to be turned. Alternately, the temporary construction support form for masonry arches or lintels.
Center bit
Drill bit used to locate the precise center of a hole to be drilled. The sharp, small point, which extends from the cutting end focuses the force of the drill and bores a small hole. Also called a brad point bit, it eliminates the need for a center punch by preventing the bit from drifting off center.
Center drill
Short shank drill designed to drill a shallow, flared hole in the end of a piece of metal, which will be turned in a lathe. The lathe tailstock center fits in the center-drilled hole in the metal.
Center gauge
Also called a thread gauge, this template that has an internal V on one end and an External V on the other with two smaller V's on the side with each of them being precision ground and lapped. This gauge is used for setting tool bits in the tool post of the lathe, for checking the included angles of machine centers and checking the shapes of threading tool bits.
Center head
V-shaped device, which is mounted on a ruler, very much the way a blade is on a combination square, and is placed against a circular object with the object is in the center of the V, which allows for measurement of the radius of the circular object.
Center hung sash
Widow sash that moves horizontally around suspension points in the center.
Center mullion
The vertical piece of wood on the front of a cabinet that divides the opening into two parts.
Center of gravity
The center point of any object where the mass is evenly distributed around.
Center punch
Conical tipped punch of hardened steel, which is used to mark indentations in metal.
Center-to-center
Measurement that goes from the centerline of one object to the centerline of another.
