Assessments - 3, GPA: 4.3 ( )

Fabricante : Makita Arquivo Tamanho: 538.1 kb Arquivo Nome : Língua de Ensino:

For counterclockwise rotation, you cannot push in the lock button. Selection action mode (Fig. 8) This tool 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 M symbol on the tool body. For rotation with hammering, turn the knob so that the arrow on the knob points toward the r symbol on the tool body. CAUTION: • Always set the knob fully to your desired mode symbol. If you operate the tool with the knob positioned halfway between the mode symbols, the tool may be damaged. • Use the knob after the tool comes to a complete stop. 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 tool immediately. This will help prevent premature wear of the tool. • Hole saws cannot be used with this tool. 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 tool. Light pressure gives best results. Keep the tool 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 tool 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 tremendous and sudden twisting force exerted on the tool/bit at the time of hole breakthrough, 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 tool by both side grip and switch handle during operations. Failure to do so may result in the loss of control of the tool and potentially severe injury. Bit grease Coat the bit shank head beforehand with a small amount of bit grease (about 0.5 – 1 g). This chuck lubrication assures smooth action and longer service life. Blow-out bulb (Fig. 9) Use the blow-out bulb to clean out the hold. Dust cup (Fig. 10) Use the dust cup to prevent dust from falling over the tool and on yourself when performing overhead drilling operations. Attach the dust cup to the bit as shown in Fig. 10. The size of bits which the dust cup can be attached to is as follows. Bit diameter (mm) Dust cup 5 6 – 14.5 Dust cup 9 12 – 16 Drilling in wood or metal (Fig. 11 and 12) Drilling in wood or metal (Fig. 11 and 12) CAUTION: • Never use “rotation with hammering” when the drill chuck assembly is installed on the tool. The drill chuck assembly may be damaged. Also, the drill chuck will come off when reversing the tool. (For Model HR2020 and HR2020X) • Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your bit, decrease the tool performance and shorten the service life of the tool. • There is a tremendous twisting force exerted on the tool/bit at the time of hole breakthrough. Hold the tool firmly and exert care when the bit begins to break through the workpiece. • A stuck bit can be removed simply by setting the reversing switch to reverse rotation in order to back out. However, the tool may back out abruptly if you do not hold it firmly. • Always secure small workpieces in a vise or similar hold-down device. • When performing diamond core drilling operation, always set the change lever to the M position to use “rotation only” action. If performing diamond core drilling ope...

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