center gage (sentergaj)

A guide or gage used in centering work in a lathe. IMG:content-0025.png:[blocks in formation] A B Center-gage. At A is shown the manner of gaging the angle to which a lathe-center should be turned; death and hichee ground; and at C, the correct thread already cut. B , angle to a screw ne of the angle of a screw centering, centring) (sent ering, tring), n. [ centers of a set of lenses into line. timber by which an arch, as of a bridge or any vaulted work, is supported during its erection. The centering of a bridge, like that of any other arch or vault, serves to keep the stones or vou oirs in position Centering, Waterloo Bridge, London. till they are keyed in, that is, fixed by the placing of the requisite number of stones in the center. The construction of the centering is a matter demanding the utmost care of the architect or builder. The removal of the wooden framework is called striking the centering, and on this being done what is called the settlement of the arch takes place, the central vou oirs sinking a little, and those in the flanks rising. Also center, centre, and formerly cinter, cintre. If a framework for the centring of the dome were to be built up from the ground, they stood aghast at the quantity of timber required for it. C. E. Norton, Church-building in Middle Ages, p. 244. Common centering, centering without a tru , but with merely a tie-beam.