GAP
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STÖGER Screw and assembly systems The new GAP Control screwdriving process with a mechanical check of screw head contact to surface Final torque Pre torque Tolerance Angle undefined Torque angle Why GAP Control? Torque reached, angle reached. But is the screw head actually in contact with the workpiece? Only GAP Control gives a clear answer ! Function In addition to standard torque and angle detection, the new GAP Control screwdriving process assesses the height of the screw head and individually calculates the screwdriving depth in relation to the workpiece level. Your advantage Documented reliability is achieved by directly measuring the screw head’s contact to the workpiece. In combination with a torque-angle controlled screwdriving process, the error rate is almost zero!!

Sources of errors in screwdriving processes Fin on the thread of the screw or workpiece Dimension or manufacturing tolerances of threads Tolerances in workpiece height Different thread friction Self-tapping screws in cast metal are a good example for a possible accumulation of error sources. They cannot be adequately controlled with indirect measuring methods such as torque and angle. The various sources of error require a suitable tolerance window when setting, for example, the pre torque or the final angle. The GAP Control process eliminates these tolerances. Calculating the head contact...