HR2420 - Drill MAKITA - Free user manual and instructions

USER MANUAL HR2420 MAKITA

Due to the continuing program of research and development, the specifications herein are subject to change without prior notice.

Note: Specifications may differ from country to country. Power supply The machine should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on single-phase AC supply. They are double-insulated in accordance with European Standard and can, therefore, also be used from sockets without earth wire. Safety hints For your own safety, please refer to enclosed safety instructions.

and/or face shield. It is also highly recom- mended that you wear a dust mask, ear pro- tectors and thickly padded gloves.

2. Be sure the bit is secured in place before

3. Under normal operation, the machine is

designed to produce vibration. The screws can come loose easily, causing a breakdown or accident. Check tightness of screws care- fully before operation.

4. In cold weather or when the machine has not

been used for a long time, let the machine warm up for several minutes by operating it under no load. This will loosen up the lubrica- tion. Without proper warm-up, hammering operation is difficult.

5. Always be sure you have a firm footing.

Be sure no one is below when using the machine in high locations.

6. Hold the machine firmly with both hands.

7. Keep hands away from moving parts.

8. Do not leave the machine running. Operate the

machine only when hand-held.

9. Do not point the machine at any one in the

area when operating. The bit could fly out and injure someone seriously.

10. When drilling or chipping into walls, floors or

wherever ‘‘live’’ electrical wires may be encountered, DO NOT TOUCH ANY METAL PARTS OF THE MACHINE! Hold the machine by the insulated grasping surfaces to prevent electric shock if you drill or chip into a ‘‘live’’ wire.

11. Do not touch the bit or parts close to the bit

immediately after operation; they may be extremely hot and could burn your skin. SAVE THESE INSTRUCTIONS. OPERATING INSTRUCTIONS Side grip (auxiliary handle) (Fig. 1) The side grip swings around to either side, allowing easy handling of the machine in any position. Loosen the side grip by turning it counterclockwise, swing it to the desired position and then tighten it by turning clockwise. Installing or removing drill bit Important: Always be sure that the machine is switched off and unplugged before installing or removing the bit. Clean the bit shank and apply bit grease before installing the bit. (Fig. 2) Insert the bit into the machine. Turn the bit and push it in until it engages. (Fig. 3) If the bit cannot be pushed in, remove the bit. Pull the chuck cover down a couple of times. Then insert the bit again. Turn the bit and push it in until it engages. (Fig. 4) After installing, always make sure that the bit is securely held in place by trying to pull it out. To remove the bit, pull the chuck cover down all the way and pull the bit out. 5Depth gauge (Fig. 5) The depth gauge is convenient for drilling holes of uniform depth. Insert the depth gauge into the hole in the grip base. Adjust the depth gauge to the desired depth and then tighten the clamp screw to secure the depth gauge. NOTE: The depth gauge cannot be used at the position where the depth gauge strikes against the gear housing. Switch action (Fig. 6) CAUTION: Before plugging in the machine, always check to see that the switch trigger actuates properly and returns to the ‘‘OFF’’ position when released. To start the machine, simply pull the trigger. Machine speed is increased by increasing pressure on the trigger. Release the trigger to stop. Reversing switch action (Fig. 6) CAUTION:

Use the reversing switch only after the machine comes to a complete stop. Changing the direction of rotation before the machine stops may damage the machine.

Do not pull the switch trigger when the reversing switch lever is in the neutral position. If you pull the trigger forcibly, the switch may be damaged. This machine has a reversing switch to change the direction of rotation. Move the lever to the posi- tion (A position) for clockwise rotation or the posi- tion (B position) for counterclockwise rotation. Selecting action mode (Fig. 7) This machine employs an action mode changing knob. Select one of the two modes suitable for your work needs by using this knob. For rotation only, turn the knob so that the arrow on the knob points toward the symbol on the machine body. For rotation with hammering, turn the knob so that the arrow on the knob points toward the symbol on the machine body. CAUTION: Always set the knob fully to your desired mode symbol. If you operate the machine with the knob positioned half-way between the mode symbols, the machine may be damaged. Torque limiter The torque limiter will actuate when a certain torque level is reached. The motor will disengage from the output shaft. When this happens, the bit will stop turning. CAUTION:

As soon as the torque limiter actuates, switch off the machine immediately. This will help prevent prema- ture wear of the machine.

Hole saws, core bits, diamond core bits, etc. cannot be used with this machine. They tend to pinch or catch easily in the hole. This will cause the torque limiter to actuate too frequently. Hammer drilling operation Position the bit at the desired location for the hole, then pull the trigger. Do not force the machine. Light pressure gives best results. Keep the machine in position and prevent it from slipping away from the hole. Do not apply more pressure when the hole becomes clogged with chips or particles. Instead, run the machine at an idle, then remove the bit partially from the hole. By repeating this several times, the hole will be cleaned out and normal drilling may be resumed. CAUTION: There is a tremendous and sudden twisting force exerted on the machine/bit at the time of hole break- through, when the hole becomes clogged with chips and particles, or when striking reinforcing rods embedded in the concrete. Always use the side grip (auxiliary handle) and firmly hold the machine by both side grip and switch handle during operations. Failure to do so may result in the loss of control of the machine and potentially severe injury. Bit grease Coat the bit shank head beforehand with a small amount of bit grease (about 0.5–1g). This chuck lubrication assures smooth action and longer service life. Blow-out bulb (Fig. 8) Use the blow-out bulb to clean out the hole. Dust cup (Fig. 9) Use the dust cup to prevent dust from falling over the machine and on yourself when performing overhead drilling operations. Attach the dust cup to the bit as shown in Fig. 9. The dust cup can be attached to the bit up to 14.5 mm in diameter. 6Drilling in wood or metal (Fig. 10) Use the optional drill chuck assembly (consisting of drill chuck and chuck adapter assembly). When installing it, refer to ‘‘Installing or removing drill bit’’ described on the previous page. Set the action mode changing knob to ‘‘rotation only’’. You can drill up to 13 mm diameter in metal and up to 32 mm diameter in wood. CAUTION: Never use ‘‘rotation with hammering’’ when the drill chuck assembly is installed on the machine. The drill chuck assembly may be damaged. Also, the drill chuck will come off when reversing the machine. NOTE: If you need to assemble the drill chuck and chuck adapter assembly, proceed as follows. Secure the drill chuck in a vise or similar securing devise. Place the chuck key in one of the three holes so that the chuck body will not turn. (Fig. 11) Remove the screw from the chuck adapter assembly and screw the chuck adapter into the drill chuck. Use a wrench to tighten the chuck adapter securely, applying about 300 – 400 kgf

cm torque. (Note: you can obtain 300 – 400 kgf

Plastic carrying case

‘‘M’’ stands for max. drilling depth.

Dust extractor attachment