Makita HP330D Instruction Manual

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7OPERATIONFig.9CAUTION:• Always insert the battery cartridge all the way until itlocks in place. Otherwise, it may accidentally fall out ofthe tool, causing injury to you or someone around you.Hold the tool firmly with one hand on the grip and theother hand on the bottom of the battery cartridge tocontrol the twisting action.CAUTION:• Do not cover vents, or it may cause overheatingand damage to the tool.Hammer drilling operationCAUTION:• There is a tremendous and sudden twisting forceexerted on the tool/bit at the time of holebreak-through, when the hole becomes cloggedwith chips and particles, or when striking reinforcingrods embedded in the concrete.First, turn the action mode changing ring so that the arrowon the tool body points to the marking. The adjustingring can be aligned in any torque levels for this operation.Be sure to use a tungsten-carbide tipped bit.Position the bit at the desired location for the hole, thenpull the switch trigger. Do not force the tool. Lightpressure gives best results. Keep the tool in position andprevent it from slipping away from the hole.Do not apply more pressure when the hole becomesclogged with chips or particles. Instead, run the tool at anidle, then remove the bit partially from the hole. Byrepeating this several times, the hole will be cleaned outand normal drilling may be resumed.Blow-out bulb (optional accessory)Fig.10After drilling the hole, use the blow-out bulb to clean thedust out of the hole.Drilling operationFirst, turn the adjusting ring so that the pointer points tothe marking. Then proceed as follows.CAUTION:• Pressing excessively on the tool will not speed upthe drilling. In fact, this excessive pressure will onlyserve to 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/bitat the time of hole break through. Hold the toolfirmly and exert care when the bit begins to breakthrough the workpiece.• 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 youdo not hold it firmly.• Always secure small workpieces in a vise or with asimilar hold-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.• Do not pull the switch trigger repeatedly when themotor is locked. It may damage the tool.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 to make ahole, make an indentation with a center-punch andhammer at the point to be drilled. Place the point of thebit in the indentation and start drilling.Use a cutting lubricant when drilling metals. Theexceptions are iron and brass which should be drilled dry.Screwdriving operationFirst, turn the action mode changing ring so that thearrow on the tool body points to the marking. Adjustthe adjusting ring to the proper torque level for your work.Then proceed as follows.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 in thescrew head, or the screw and/or bit may be damaged.NOTE:• When driving wood screw, predrill a pilot hole 2/3the diameter of the screw. It makes driving easierand prevents splitting of the workpiece.Using the tool as a hand screwdriverFig.11Switch off the tool.Move the reversing switch lever to the neutral position.Turn the tool.NOTE:• This use is convenient for checking the screwdriving.• Do not use the tool for work requiring excessive force,such as tightening bolt or removing rusted screws.Using holster (optional accessory)CAUTION:• Do not use for tools such as a drill with a bitinstalled on them.• Turn off the tool and wait until it comes to acomplete stop before placing it in the holster.Be sure to close the holster securely so that it holdsthe tool firmly.