Makita DTD157 Instruction Manual

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8 ENGLISHChanging the impact force► Fig.7: 1. Hard 2. Soft 3. A mode 4. Changed in threesteps 5. ButtonYou can change the impact force in three steps: hard,soft, and A mode.This allows a tightening suitable to the work.Every time the button is pressed, the number of blowschanges in three steps.“A mode (assist mode)” is an easy-to-use mode fordriving screws with good control.In this mode, the tool drives a screw with low-speedrotation at first. After the tool starts to impact, the rota-tion speed increases and reaches the maximum speed.For approximately one minute after releasing the switchtrigger, the impact force can be changed.Impact force grade displayedon panelMaximum blows Purpose Example of applicationHard 4,100 min -1 (/min) Tightening when force andspeed are desired.Tightening wood screws,tightening bolts.Soft 2,000 min -1 (/min) Tightening with less force toavoid screw thread breakage.Tightening sash screws, tight-ening small screws such as M6.A mode 4,100 min -1 (/min) Tightening screws with bettercontrol.Tightening long screws.NOTE: A mode is available only when the tool rotates clockwise. When rotating counterclockwise in A mode, theimpact force and speed are the same as hard mode.NOTE: When all lamps on the switch panel go out, the tool is turned off to save the battery power. The impact forcegrade can be checked by pulling the switch trigger to the extent that the tool does not operate.NOTE: While pulling the switch trigger, the impact force grade cannot be changed.ASSEMBLYCAUTION: Always be sure that the tool isswitched off and the battery cartridge is removedbefore carrying out any work on the tool.Installing or removing driver bit/socket bit► Fig.8Use only driver bit/socket bit that has inserting portionshown in the figure. Do not use any other driver bit/socket bit.For tool with shallow driver bit holeA=12mmB=9mmUse only these type of driverbit. Follow the procedure1. (Note) Bit-piece is notnecessary.For tool with deep driver bit holeA=17mmB=14mmTo install these types of driverbits, follow the procedure 1.A=12mmB=9mmTo install these types of driverbits, follow the procedure 2.(Note) Bit-piece is necessaryfor installing the bit.Procedure 1► Fig.9: 1. Driver bit 2. SleeveTo install the driver bit, pull the sleeve in the direction ofthe arrow and insert the driver bit into the sleeve as faras it will go.Then release the sleeve to secure the driver bit.Procedure 2In addition to Procedure 1, insert the bit-piece into thesleeve with its pointed end facing in.► Fig.10: 1. Driver bit 2. Bit-piece 3. SleeveTo remove the driver bit, pull the sleeve in the directionof the arrow and pull the driver bit out.NOTE: If the driver bit is not inserted deep enoughinto the sleeve, the sleeve will not return to its originalposition and the driver bit will not be secured. In thiscase, try re-inserting the bit according to the instruc-tions above.NOTE: When it is difficult to insert the driver bit, pullthe sleeve and insert it into the sleeve as far as it willgo.NOTE: After inserting the driver bit, make sure that itis firmly secured. If it comes out, do not use it.