Abstract: In a compass saw formed as a hand-held machine tool a flat saw blade is connected with a flat reciprocating rod by a connecting device which comprises a cup-shaped clamping sleeve screwed on a rotary member formed with a through hole extended in the direction of elongation of the reciprocating rod the end of which is inserted into that hole. The shaft of the saw blade passes through a bore formed in the clamping sleeve and partially extends into the hole in the rotary member. Two opposing pins formed on the shaft of the saw blade limit the extension of the saw blade shaft into the hole of the rotary member. The end of the shaft is pressed against a recess formed in the reciprocating member, on the one hand, and the pins of the shaft are engaged in depressions formed in the rotary member, on the other hand, whereby clamping of the shaft of the saw blade with the end of the reciprocating rod in the clamping sleeve is ensured.

Abstract: In a motor-driven hand-held saw, the end of the reciprocating rod is clamped with the shaft of the saw blade in a locking sleeve which is displaced between a locked and released position along the elongation of the reciprocating rod and is operated from outside of a protective shield which surrounds the end of the reciprocating rod and the shaft of the saw blade connected to each other by the locking sleeve.