Cylindrical Squares, used on surface plates, provide one of the most reliable 90° reference standards available in the industry today. Work may be placed against the periphery and sighted, or for greater convenience, the Cylindrical Square may be used to set a No. 9146 Comparator Square for transfer type inspection with direct indicator squareness readings. Cylindrical squares are also used for checking the squareness of the vertical axis to the horizontal axis of numerically controlled machining centers.

SPECIFICATIONS

Taft-Peirce Cylindrical Squares are made of high quality alloy steel, scientifically heat treated for maximum stability and wear resistance. The periphery is ground between centers straight and round within the tolerance specified for each size, with an extremely fine micro finish. The ends, recessed and provided with self-cleaning dirt grooves, are ground and lapped square with the axis within the specified tolerances. Each square is packed in a finished wood case with hinged cover.