Hand riveting tool

A manually actuable blind riveting tool, comprising:

• a tool housing having a front end,
• a sleeve member arranged at the front end of the tool housing, the sleeve member having a front end and is threadly engaged with the tool housing, the sleeve member being adapted to be screwed into the tool housing, the sleeve member further having a rear end region provided with an external screwthread and wherein the diameter of the screwthreaded rear end region is smaller than that of an unthreaded front end region thereof,
• a mouthpiece member at a front end of the sleeve member for receiving a pulling mandrel of a rivet,
• a collet for clamping the pulling mandrel, the collet arranged in the sleeve member behind the mouthpiece member,
• a lock nut for steplessly arresting the sleeve member in its axial position with respect to the collet, the lock nut has a front portion and a rear portion, wherein only the rear portion is provided with an internal screwthread, and wherein the inside diameter of the unthreaded front portion is larger than that of the rear portion and is larger than that of the unthreaded front end region of the sleeve member, the front end region acts as an abutment means for the lock nut,
• a movable pulling plunger which extends through the tool housing and is connected to the collet and provides in an interior of the housing a discharge passage for a torn-away pulling mandrel,
• first and second pivotal levers arranged laterally on the tool housing for the transmission of an axial force component to the pulling which results in a stroke movement thereof during a riveting operation, and
• means for adjusting the stoke movement of the pulling plunger by rotating the sleeve member to vary the spacing between the mouthpiece and the collet.