Makita HR2621 Owners Manual - Page 10

Drilling in wood or metal 1 1. Chuck adapter 2. Keyless drill chuck Operation when using the dust cup (optional accessory) 1. Dust cap 2 1 014502 Use the optional drill chuck assembly. When installing it, refer to "Installing or removing the bit" described on the previous page. 010736 Operate the tool with the dust cup against the ceiling surface. CAUTION: • Never use "rotation with hammering" when the quick change drill chuck is installed on the tool. The quick change drill chuck may be damaged. Also, the drill chuck will come off when reversing the tool. • 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. Diamond core drilling When performing diamond core drilling operations, always set the change lever to the position to use "rotation only" action. CAUTION: • If performing diamond core drilling operations using "rotation with hammering" action, the diamond core bit may be damaged. NOTE: • The dust cup is intended only for drilling in the ceramic workpiece such as concrete and mortar. Do not use the tool with the dust cup when drilling in metal or similar. Using the dust cup for drilling in the metal may damage the dust cup due to the heat produced by small metal dust or similar. • Empty the dust cup before removing a drill bit. • When using the dust cup, make sure that the dust cap is mounted on it securely. MAINTENANCE CAUTION: • Always be sure that the tool is switched off and unplugged before attempting to perform inspection or maintenance. • Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result. To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and replacement, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts. OPTIONAL ACCESSORIES CAUTION: • These accessories or attachments are recommended for use with your Makita tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or attachment for its stated purpose. If you need any assistance for more details regarding these accessories, ask your local Makita Service Center. • SDS-Plus Carbide-tipped bits • Bull point • Cold chisel 10