Makita DDF446 Instruction Manual

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Contents

7006421Drilling 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 guide screwmakes drilling easier by pulling the bit into the workpiece.Drilling in metalTo prevent the bit from slipping when starting a hole,make an indentation with a center-punch and hammer atthe point to be drilled. Place the point of the bit in theindentation and start drilling.Use a cutting lubricant when drilling metals. Theexceptions are iron and brass which should be drilled dry.CAUTION:• Pressing excessively on the tool will not speed up thedrilling. In fact, this excessive pressure will only serveto damage the tip of your bit, decrease the toolperformance and shorten the service life of the tool.• There is a tremendous force exerted on the tool/bit atthe time of hole break through. Hold the tool firmly andexert care when the bit begins to break through theworkpiece.• A stuck bit can be removed simply by setting thereversing switch to reverse rotation in order to backout. However, the tool may back out abruptly if you donot hold it firmly.• Always secure small workpieces in a vise or similarhold-down device.• If the tool is operated continuously until the batterycartridge has discharged, allow the tool to rest for15 minutes before proceeding with a fresh battery.MAINTENANCECAUTION:• Always be sure that the tool is switched off and thebattery cartridge is removed before attempting toperform inspection or maintenance.• Never use gasoline, benzine, thinner, alcohol or thelike. Discoloration, deformation or cracks may result.Replacing carbon brushes (Fig. 12)Replace when they wear down to the limit mark. Keep thecarbon brushes clean and free to slip in the holders.Both carbon brushes should be replaced at the sametime. Use only identical carbon brushes.Use a screwdriver to remove two screws then remove therear cover. (Fig. 13)Raise the arm part of the spring and then place it in therecessed part of the housing with a slotted bit screwdriverof slender shaft or the like. (Fig. 14)Use pliers to remove the carbon brush caps of the carbonbrushes. Take out the worn carbon brushes, insert thenew ones and replace the carbon brush caps in reverse.(Fig. 15)Make sure that the carbon brush caps have fit into theholes in brush holders securely. (Fig. 16)Reinstall the rear cover and tighten two screws securely.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized Service Centers, alwaysusing Makita replacement parts.OPTIONAL ACCESSORIESCAUTION:• These accessories or attachments are recommendedfor use with your Makita tool specified in this manual.The use of any other accessories or attachments mightpresent a risk of injury to persons. Only use accessoryor attachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Drill bits• Screw bits• Hook• Bit holder• Automatic refreshing adapter• Plastic carrying case• Makita genuine battery and chargerNOTE:• Some items in the list may be included in the toolpackage as standard accessories. They may differfrom country to country.Noise ENG905-1The typical A-weighted noise level determined accordingto EN60745:Sound pressure level (L pA ): 71 dB (A)Uncertainty (K): 3 dB (A)The noise level under working may exceed 80 dB (A).Wear ear protection.Vibration ENG900-1The vibration total value (tri-axial vector sum) determinedaccording to EN60745:Work mode: drilling into metalVibration emission (ah,D ): 2.5 m/s2 or lessUncertainty (K): 1.5 m/s 2ENG901-1• The declared vibration emission value has beenmeasured in accordance with the standard test methodand may be used for comparing one tool with another.• The declared vibration emission value may also beused in a preliminary assessment of exposure.Nominal diameter of woodscrew (mm)Recommended size of pilothole (mm)3.1 2.0 - 2.23.5 2.2 - 2.53.8 2.5 - 2.84.5 2.9 - 3.24.8 3.1 - 3.45.1 3.3 - 3.65.5 3.7 - 3.95.8 4.0 - 4.26.1 4.2 - 4.4