6 ENGLISHRotation with hammeringFor drilling in concrete, masonry, etc., rotate the actionmode changing knob to the symbol. Use a tungsten-carbide tipped bit (optional accessory).12► 1. Rotation with hammering 2. Action mode chang-ing knobRotation onlyFor drilling in wood, metal or plastic materials, rotatethe action mode changing knob to the symbol. Use atwist drill bit or wood drill bit.1► 1. Rotation onlyHammering onlyFor chipping, scaling or demolition operations, rotatethe action mode changing knob to the symbol. Use abull point, cold chisel, scaling chisel, etc.1► 1. Hammering onlyTorque limiterNOTICE: As soon as the torque limiter actuates,switch off the tool immediately. This will help pre-vent premature wear of the tool.NOTICE: Drill bits such as hole saw, which tendto pinch or catch easily in the hole, are not appro-priate for this tool. This is because they will causethe torque limiter to actuate too frequently.The torque limiter will actuate when a certain torquelevel is reached. The motor will disengage from theoutput shaft. When this happens, the drill bit will stopturning.Electronic functionThe tool is equipped with the electronic functions foreasy operation.• Constant speed controlThe speed control function provides the constantrotation speed regardless of load conditions.Air ductFor HR3011FC, HR3012FC onlyCAUTION: Do not put your finger into the airduct or do not insert any other object into the airduct. Otherwise you may get injured or the tool mayget damaged.The air duct is to connect to the dust collection system.When using the dust collection system, read the sectionabout the dust collection system.1► 1. Air duct