Clamping nut for clamping tongs esp. for drill machine tool - can be tightened by spanner and on one face side has cavities to accommodate correspondingly formed pins on spanner

摘要

The cavities (13-16) are formed as long holes and the pins on the spanner have a cross-section matching the long holes. The long holes are directed at least essentially in the force acting direction of the spanner. The nut is provided with four long holes arranged on a circle on their face surface (12). The nut (10) dim. in an axial direction is less than 1 cm. An outer thread (11) is provided on the nut, with the aid of which it can be screwed into a socket or similar. The spanner has a wide grip part, on which a head with semi-circular shape is arranged. On the head three pins are arranged and have their greatest material thickness in the direction of the force effect on the nut.