6Adjusting the fastening torque123009333The fastening torque can be adjusted in 18 steps byturning the adjusting ring so that its graduations arealigned with the pointer on the tool body. The fasteningtorque is minimum when the number 1 is aligned with thepointer, and maximum when the marking is alignedwith the pointer.The clutch will slip at various torque levels when set atthe number 1 to 18. The clutch is designed not to slip atthe marking.Before actual operation, drive a trial screw into yourmaterial or a piece of duplicate material to determinewhich torque level is required for a particular application.ASSEMBLYCAUTION:• Always be sure that the tool is switched off and thebattery cartridge is removed before carrying outany work on the tool.Installing or removing driver bit or drill bit1009331Turn the sleeve counterclockwise to open the chuck jaws.Place the bit in the chuck as far as it will go. Turn thesleeve clockwise to tighten the chuck.To remove the bit, turn the sleeve counterclockwise.OPERATIONCAUTION:• Always insert the battery cartridge all the way until itlocks in place. If not, it may accidentally fall out ofthe tool, causing injury to you or someone aroundyou.Hold the tool firmly with one hand on the grip and theother hand on the bottom of the battery cartridge tocontrol the twisting action.Screwdriving operation009334CAUTION:• Adjust the adjusting ring to the proper torque levelfor your work.Place the point of the driver bit in the screw head andapply pressure to the tool. Start the tool slowly and thenincrease the speed gradually. Release the switch triggeras soon as the clutch cuts in.CAUTION:• Make sure that the driver bit is inserted straight inthe screw head, or the screw and/or bit may bedamaged.NOTE:• When driving wood screws, predrill pilot holes tomake driving easier and to prevent splitting of theworkpiece. See the chart.4.2 - 4.4 (11/64” - 11/64”)Nominal diameter of wood screw(mm)3.1 (1/8”)3.5 (9/64”)3.8 (5/32”)4.5 (11/64”)4.8 (3/16”)5.1 (13/64”)5.5 (7/32”)5.8 (7/32”)6.1 (15/64”)Recommended size of pilot hole(mm)2.0 - 2.2 (5/64” - 3/32”)2.2 - 2.5 (3/32” - 3/32”)2.5 - 2.8 (3/32” - 7/64”)2.9 - 3.2 (7/64” - 1/8”)3.1 - 3.4 (1/8” - 9/64”)3.3 - 3.6 (1/8” - 9/64”)3.7 - 3.9 (9/64” - 5/32”)4.0 - 4.2 (5/32” - 11/64”)001904Drilling operationFirst, turn the adjusting ring so that the pointer points tothe marking. Then proceed as follows.Drilling in woodWhen drilling in wood, the best results are obtained withwood drills equipped with a guide screw. The guidescrew makes drilling easier by pulling the bit into theworkpiece.Drilling in metalTo prevent the bit from slipping when starting a hole,make an indentation with a center-punch and hammer at1. Sleeve1. Pointer2. Adjusting ring3. Graduation