Cordless Impact Driver WH 7DL Handling instructions Read through carefully and understand these instructions before use.
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1 Rechargeable battery 2 Latch 3 Pull out 4 Insert 5 Handle 6 Push 7 Insert 8 Pilot lamp 9 Hole for connecting the rechargeable battery 0 Driver bit! Movement @ Guide sleeve # Hexagonal hole in the socket $ Trigger switch % Selector button ^ and marks & Light * Bending portion 3
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GENERAL SAFETY RULES WARNING! Read all instructions Failure to follow all instructions listed below may result in electric shock, fi re and/or serious injury. The term power tool in all of the warnings listed below refers to your mains operated (corded) power tool or battery operated (cordless) power tool. SAVE THESE INSTRUCTIONS 1) Work area a) Keep work area clean and well lit. Cluttered and dark areas invite accidents. b) Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust of fumes. c) Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control. 2) Electrical safety a) Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodifi ed plugs and matching outlets will reduce risk of electric shock. b) Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded. c) Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock. e) When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock. 3) Personal safety a) Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury. b) Use safety equipment. Always wear eye protection. Safety equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries. c) Avoid accidental starting. Ensure the switch is in the off position before plugging in. Carrying power tools with your fi nger on the switch or plugging in power tools that have the switch on invites accidents. d) Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury. e) Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations. f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts. g) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of these devices can reduce dust related hazards. 4) Power tool use and care a) Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed. b) Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired. c) Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally. d) Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users. e) Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tools operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools. f) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control. g) Use the power tool, accessories and tool bits etc., in accordance with these instructions and in the manner intended for the particular type of power tool, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from intended could result in a hazardous situation. 5) Battery tool use and care a) Ensure the switch is in the off position before inserting battery pack. Inserting the battery pack into power tools that have the switch on invites accidents. b) Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fi re when used with another battery pack. 10
c) Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fi re. d) When battery pack is not in use, keep it away from other metal objects like paper clips, coins, keys, nails, screws, or other small metal objects that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fi re. e) Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns. 6) Service a) Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained. PRECAUTION Keep children and infirm persons away. When not in use, tools should be stored out of reach of children and infirm persons. PRECAUTIONS FOR CORDLESS IMPACT DRIVER 1. Hold power tool by insulated gripping surfaces, when performing an operation where the fastener may contact hidden wiring. Fasteners contacting a live wire may make exposed metal parts of the power tool live and could give the operator an electric shock. 2. This is portable tool for tightening and loosenig screws. Use it only for these operation. 3. Use the earplugs if using for a long time. 4. One-hand operation is extremely dangerous; hold the unit fi rmly with both hands when operating. 5. After installing the driver bit, pull lightly out the bit to make sure that it does not come loose. If the bit is not installed properly, it can come loose during use, which can be dangerous. 6. Use the bit that matches the screw. 7. Tightening a screw with the impact driver at an angle to that screw can damage the head of the screw and the proper force will not be transmitted to the screw. Tighten with this impact driver lined up straight with the screw. 8. Always charge the battery at a temperature of 0 C 40 C. Charging the battery at temperatures outside the range of 0 C 40 C may prevent proper charging and reduce battery life. The most suitable temperature for charging is that of 20 C 25 C. 9. When one charging is completed, leave the charger for about 15 minutes before the next charging of battery. 10. Do not allow foreign matter to enter the hole for connecting the rechargeable battery. 11. Never disassemble the rechargeable battery and charger. 12. Never short-circuit the rechargeable battery. Shortcircuiting the battery will cause a great electric current and overheat. It results in burn or damage to the battery. 13. Do not dispose of the battery in fi re. If the battery burnt, it may explode. 14. Bring the battery to the shop from which it was purchased as soon as the post-charging battery life becomes too short for practical use. Do not dispose of the exhausted battery. 15. Using an exhausted battery will damage the charger. 16. Do not insert object into the air ventilation slots of the charger. Inserting metal objects or infl ammables into the charger air ventilation slots will result in electrical shock hazard or damaged charger. CAUTION ON LITHIUM-ION BATTERY To extend the lifetime, the lithium-ion battery equips with the protection function to stop the output. In the cases of 1 to 3 described below, when using this product, even if you are pulling the switch, the motor may stop. This is not the trouble but the result of protection function. 1. When the battery power remaining runs out, the motor stops. In such case, charge it up immediately. 2. If the tool is overloaded, the motor may stop. In this case, release the switch of tool and eliminate causes of overloading. After that, you can use it again. 3. If the battery is overheated under overload work, the battery power may stop. In this case, stop using the battery and let the battery cool. After that, you can use it again. Furthermore, please heed the following warning and caution. WARNING In order to prevent any battery leakage, heat generation, smoke emission, explosion and ignition beforehand, please be sure to heed the following precautions. 1. Make sure that swarf and dust do not collect on the battery. During work make sure that swarf and dust do not fall on the battery. Make sure that any swarf and dust falling on the power tool during work do not collect on the battery. Do not store an unused battery in a location exposed to swarf and dust. Before storing a battery, remove any swarf and dust that may adhere to it and do not store it together with metal parts (screws, nails, etc.). 2. Do not pierce battery with a sharp object such as a nail, strike with a hammer, step on, throw or subject the battery to severe physical shock. 3. Do not use an apparently damaged or deformed battery. 4. Do not use the battery in reverse polarity. 5. Do not connect directly to an electrical outlets or car cigarette lighter sockets. 6. Do not use the battery for a purpose other than those specifi ed. 7. If the battery charging fails to complete even when a specifi ed recharging time has elapsed, immediately stop further recharging. 8. Do not put or subject the battery to high temperatures or high pressure such as into a microwave oven, dryer, or high pressure container. 9. Keep away from fi re immediately when leakage or foul odor are detected. 10. Do not use in a location where strong static electricity generates. 11
11. If there is battery leakage, foul odor, heat generated, discolored or deformed, or in any way appears abnormal during use, recharging or storage, immediately remove it from the equipment or battery charger, and stop use. CAUTION 1. If liquid leaking from the battery gets into your eyes, do not rub your eyes and wash them well with fresh clean water such as tap water and contact a doctor immediately. If left untreated, the liquid may cause eye-problems. 2. If liquid leaks onto your skin or clothes, wash well with clean water such as tap water immediately. There is a possibility that this can cause skin irritation. 3. If you fi nd rust, foul odor, overheating, discolor, deformation, and/or other irregularities when using the battery for the fi rst time, do not use and return it to your supplier or vendor. SPECIFICATIONS POWER TOOL No-load speed Capacity (Ordinary bolt) Tightening torque (Maximum) Rechargeable battery Weight CHARGER Model Charging voltage Weight STANDARD ACCESSORIES UC7SL 7.2 V 0.35 kg 1 Battery (BCL715)...2 2 Charger (UC7SL)...1 3 Plastic case...1 4 Battery cover...1 Standard accessories are subject to change without notice. OPTIONAL ACCESSORIES (Sold separately) 1. Battery (BCL715) Optional accessories are subject to change without notice. BATTERY REMOVAL/INSTALLATION 1. Battery removal Hold the handle tightly and push the battery latch to remove the battery. (See Fig. 1 and 2) CAUTION Never short-circuit the battery. 2. Battery installation Insert the battery while observing its polarities. (See Fig. 2) CHARGING 0 2400/min M3 M8 25 N m BCL715: Li-ion 7.2 V (1.5 Ah 2 cells) 0.58 kg Before using the power tool, charge the battery as follows. 1. Connect the charger power cord to the receptacle When connecting the plug of the charger to a receptacle, the pilot lamp will blink in red (At 1-second intervals). 2. Insert the battery into the charger Firmly insert the battery into the charger till it contacts the bottom of the charger as shown in Fig. 3. 3. Charging When inserting a battery in the charger, the pilot lamp will light up continuously in red. When the battery becomes fully recharged, the pilot lamp will blink in red (At 1-second intervals). (See Table 1) (1) Pilot lamp indication The indications of the pilot lamp will be as shown in Table 1, according to the condition of the charger or the rechargeable battery. APPLICATIONS Driving and removing of machine screws, wood screws, tapping screws, etc. 12
Table 1 Indications of the pilot lamp Before charging Blinks Lights for 0.5 seconds. Does not light for 0.5 seconds. (off for 0.5 seconds) While charging Lights Lights continuously Pilot lamp (red) Charging complete Overheat standby Charging impossible Blinks Blinks Flickers Lights for 0.5 seconds. Does not light for 0.5 seconds. (off for 0.5 seconds) Lights for 1 second. Does not light for 0.5 seconds. (off for 0.5 seconds) Lights for 0.1 second. Does not light for 0.1 seconds. (off for 0.1 seconds) Battery overheated. Unable to charge (Charging will commence when battery cools). Malfunction in the battery or the charger. (2) Regarding the temperatures of the rechargeable battery The temperatures for rechargeable batteries are as shown in the Table 2, and batteries that have become hot should be cooled for a while before being recharged. Table 2 Recharging ranges of batteries Rechargeable batteries Temperatures at which the battery can be recharged BCL715 0 C 50 C (3) Regarding recharging time Depending on the combination of the charger and batteries, the charging time will become as shown in Table 3 Table 3 Charging time (At 20 C) Battery BCL715 Charger UC7SL Approx. 30 min. NOTE The charging time may vary according to temperature and power source voltage. 4. Disconnect the charger s power cord from the receptacle. 5. Hold the charger firmly and pull out the battery. NOTE Be sure to pull out the battery from the charger after use, and then keep it. How to make the batteries perform longer (1) Recharge the batteries before they become completely exhausted. When you feel that the power of the tool becomes weaker, stop using the tool and recharge its battery. If you continue to use the tool and exhaust the electric current, the battery may be damaged and its life will become shorter. (2) Avoid recharging at high temperatures. A rechargeable battery will be hot immediately after use. If such a battery is recharged immediately after use, its internal chemical substance will deteriorate, and the battery life will be shortened. Leave the battery and recharge it after it has cooled for a while. CAUTION If the battery is charged while it is heated because it has been left for a long time in a location subject to direct sunlight or because the battery has just been used, the pilot lamp of the charger lights for 1 second, does not light for 0.5 seconds (off for 0.5 seconds). In such a case, fi rst let the battery cool, then start charging. When the pilot lamp fl ikers (at 0.2-second intervals), check for and take out any foreign objects in the charger s battery connector. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your authorized Service Center. Since the built-in micro computer takes about 3 seconds to confi rm that the battery being charged with UC7SL is taken out, wait for a minimum of 3 seconds before reinserting it to continue charging. If the battery is reinserted within 3 seconds, the battery may not be properly charged. PRIOR TO OPERATION Setting up and checking the work environment Check if the work environment is suitable by the above precautions. HOW TO USE 1. Installing the bit Always follow the following procedure to install driver bit. (Fig. 4) (1) Pull the guide sleeve forward. (2) Insert the bit into the hexagonal hole in the socket. (3) Release the guide sleeve and it returns to its original position. CAUTION If the guide sleeve does not return to its original position, then the bit is not installed properly. 13
2. Removing the bit Please do the opposite point on the method of installing bit. 3. Confirm that the battery is mounted correctly 4. Check the rotational direction The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button. The L-side of the selector button is pushed to turn the bit counterclockwise. (See Fig. 5) (The L and R marks are provided on the body.) 5. Switch operation When the trigger switch is depressed, the tool rotates. When the trigger is released, the tool stops. The rotational speed of the drill can be controlled by varying the amount that the trigger switch is pulled. Speed is low when the trigger switch is pulled slightly and increases as the trigger switch is pulled more. NOTE A buzzing noise is produced when the motor is about to rotate. This is only a noise, not a machine failure. 6. Using the light Pull the trigger switch to light up the light. The light keeps on lighting while the trigger switch is being pulled. The light goes out after releasing the trigger switch. (Fig. 6) CAUTION Do not look directly into the light. Such actions could result in eye injury. 7. Tightening and loosening screws Install the bit that matches the screw, line up the bit in the grooves of the head of the screw, then tighten it. Push the impact driver just enough to keep the bit fi tting the head of the screw. CAUTION Applying the impact driver for too long tightens the screw too much and can break it. Tightening a screw with the impact driver at an angle to that screw can damage the head of the screw and the proper force will not be transmitted to the screw. Tighten with this impact driver lined up straight with the screw. 8. Using in the straight or pistol configuration Use the tool in the straight confi guration when using in confi ned spaces. Use it in the pistol confi guration when using in other locations. Select the confi guration that best matches the tool application. When changing the confi guration, the tool will make a clicking sound when it snaps into position. Bend (or extend) the tool until the clicking sound is heard. CAUTION When using the tool in the pistol confi guration, do not hold onto the bending portion of the tool when returning to the straight confi guration. Your fi nger or other part of the hand may be pinched by the bending portion resulting in possible injury (Fig. 7). 9. Automatic spindle-lock mechanism When the main switch is off, the bit is locked in place, and the tool can be used as a manual screwdriver. OPERATIONAL CAUTIONS 1. Resting the unit after continuous work After use for continuous bolt-tightening work, rest the unit for 15 minutes or so when replacing the battery. The temperature of the motor, switch, etc., will rise if the work is started again immediately after battery replacement, eventually resulting in burnout. NOTE Do not touch the metal parts, as it gets very hot during continuous work. 2. Cautions on use of the speed control switch This switch has a built-in, electronic circuit which steplessly varies the rotation speed. Consequently, when the switch trigger is pulled only slightly (low speed rotation) and the motor is stopped while continuously driving in screws, the components of the electronic circuit parts may overheat and be damaged. 3. Use a tightening time suitable for the screw The appropriate torque for a screw differs according to the material and size of the screw, and the material being screwed etc., so please use a tightening time suitable for the screw. In particular, if a long tightening time is used in the case of screws smaller than M8, there is a danger of the screw breaking, so please confi rm the tightening time and the tightening torque beforehand. 4. Work at a tightening torque suitable for the bolt under impact The optimum tightening torque for nuts or bolts differs with material and size of the nuts or bolts. An excessively large tightening torque for a small bolt may stretch or break the bolt. The tightening torque increases in proportion to the operaton time. Use the correct operating time for the bolt. 5. Confirm the tightening torque The following factors contribute to a reduction of the tightening torque. So confi rm the actual tightening torque needed by screwing up some bolts before the job with a hand torque wrench. Factors affecting the tightening torque are as follows. (1) Voltage When the discharge margin is reached, voltage decreases and tightening torque is lowered. (2) Operating time The tightening torque increases when the operating time increases. But the tightening torque does not increase above a certain value even if the tool is driven for a long time. (3) Diameter of bolt The tightening torque differs with the diameter of the bolt. Generally a larger diameter bolt requires larger tightening torque. (4) Tightening conditions The tightening torque differs according to the torque ratio; class, and length of bolts even when bolts with the same size threads are used. The tightening torque also differs according to the condition of the surface of workpiece through which the bolts are to be tightened. When the bolt and nut turn together, torque is greatly reduced. MAINTENANCE AND INSPECTION 1. Inspecting the driver bit Using a broken bit or one with a worn out tip is dangerous because the bit can slip. Replace it. 2. Inspecting the mounting screws Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so may result in serious hazard. 3. Maintenance of the motor The motor unit winding is the very heart of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water. 4. Cleaning of the outside When the impact driver is stained, wipe with a soft dry cloth or a cloth moistened with soapy water. Do not use chloric solvents, gasoline or paint thinner, as they melt plastics. 14
5. Storage Store the impact driver in a place in which the temperature is less than 40 C, and out of reach of children. NOTE Make sure that the battery is fully charged when stored for a long period (3 months or more). The battery with smaller capacity may not be able to be charged when used, if stored for a long period. 6. Service parts list CAUTION Repair, modifi cation and inspection of Hitachi Power Tools must be carried out by an Hitachi Authorized Service Center. This Parts List will be helpful if presented with the tool to the Hitachi Authorized Service Center when requesting repair or other maintenance. In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed. MODIFICATIONS Hitachi Power Tools are constantly being improved and modifi ed to incorporate the latest technological advancements. Accordingly, some parts may be changed without prior notice. Important notice on the batteries for the Hitachi cordless power tools Please always use one of our designated genuine batteries. We cannot guarantee the safety and performance of our cordless power tool when used with batteries other than these designated by us, or when the battery is disassembled and modifi ed (such as disassembly and replacement of cells or other internal parts). NOTE Due to HITACHI s continuing program of reserch and development, the specifi cations herein are subject to change without prior notice. 15
Item No. 1 GUIDE SLEEVE SET (INCLUD.2-5, 12) Part Name Q TY 2 RETAINING RING 1 3 WASHER (F) 1 4 GUIDE SPRING (C) 1 5 GUIDE SLEEVE (C) 1 6 OIL SEAL 1 7 INVERTED RING 1 8 BALL BEARING 6801VVCMSRL 2 9 METAL 1 10 NEEDLE PIN 2 11 CARRIER 2 12 STEEL BALL D3.175 1 13 ANVIL 1 14 STEEL BALL D4.76 2 15 HAMMER 1 16 STEEL BALL D3 23 17 WASHER (J) 2 18 TAPPING SCREW (W/FLANGE) D4 20 19 HAMMER SPRING 1 20 STOPPER 1 21 SPINDLE 1 22 IDLE GEAR SET 2 23 NEEDLE ROLLER (A) 2 24 WASHER (C) 1 25 MACHINE SCREW (W/SP.WASHER) M2.6 6 26 RING GEAR 1 27 MOTOR DC 7.2V 1 28 HOUSING (A).(B) SET 1 29 TAPPING SCREW (W/FLANGE) D3 16 30 NAME PLATE 1 31 CAUTION LABEL 1 32 CLICK PLATE 2 33 STEEL BALL D3 4 1 1 2 6 Item No. Part Name Q TY 34 INTERNAL WIRE FERRITE SET 1 35 HANDLE COVER 1 36 DC-SPEED CONTROL SWITCH 1 37 SWITCH TRIGGER 1 38 PUSHING BUTTON 1 39 TERMINAL CAPACITOR 1 40 BATTERY BCL 715 2 41 HANDLE (A).(B) SET (INCLUD.33) 1 42 CLIP 2 501 + DRIVER BIT 1 502 CHARGER (MODEL UC7SL) 1 503 CASE 1 504 BATTERY COVER 1 16
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Hitachi Koki Co., Ltd. 301 Code No. C99207221 G Printed in China