22 enWorking instructions.Before mounting or replacing cutting tool or accessories, pull the power plug.This preventive safety measure rules out the danger of injuries through acciden-tal starting of the power tool.For each job, use only the FEIN application tool released and intended for the respectiveapplication.Switching on and off.Check the power supply cableand the plug for damage.Always hold the power toolfirmly. Otherwise, you couldlose control over the power tool.The self-start lock (on the GSZ8..., GSZ11...)prevents the straight grinder from automati-cally restarting again, even after a brief inter-ruption of the power supply duringoperation, e. g., from a pulled power plug.The straight grinder is fitted with overloadand blocking protection (for models GSZ8...,GSZ11...). In case of overload or blocking ofthe application tool, the power supply isinterrupted. In this case, switch the powertool off, remove it from the workpiece andcheck the application tool. Afterwards, switchthe power tool on again.Use a collet that fits the grinding accessory.Insert the clamping shaft of the grinding acces-sory to the stop into the collet.Observe the maximum permitted projectingshaft length (a) of the grinding accessoryaccording to the manufacturer's instructions.(see page 26)Move the power tool back and forth applyinguniform pressure, so that the workpiece sur-face does not become too hot.GSZ4-280EL/GSZ4-90EL (figure 6).Switching on:Push the On/Off switch forward (I).Switching off:Push the On/Off switch back ().WARNINGWARNINGCAUTIONFig. 6On/Off switchOBJ_BUCH-0000000187-001.book Page 22 Thursday, January 29, 2015 1:11 PM