User manual MAKITA HR2450

[. . . ] WARNING: For your personal safety, READ and UNDERSTAND before using. Model Concrete Core bit Capacities Steel Wood No load speed (RPM) Blows per minute Overall length Net weight 13 mm (1/2") 32 mm (1-1/4") 0 - 1, 100/min. Due to our continuing programme of research and development, the specifications herein are subject to change without notice. â· Note: Specifications may differ from country to country. [. . . ] Contact with a "live" wire will make exposed metal parts of the tool "live" and shock the operator. Wear ear protectors when using the tool for extended periods. Prolonged exposure to high intensity noise can cause hearing loss. Wear a hard hat (safety helmet), safety glasses and/or face shield. Ordinary eye or sun glasses are NOT safety glasses. Be sure the bit is secured in place before operation. under normal operation , the tool is designed to produce vibration. The screws can come loose easily, causing a breakdown or accident. check tightness of screws carefully before operation. In cold weather or when the tool has not been used for a long time, let the tool warm up for a while by operating it under no load. Be sure no one is below when using the tool in high locations. Number of blow CAUTION: Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool. Do not point the tool at any one in the area when operating. The bit could fly out and injure someone seriously. Do not touch the bit or parts close to the bit immediately after operation; they may be extremely hot and could burn your skin. Some material contains chemicals which may be toxic. Take caution to prevent dust inhalation and skin contact. CAUTION: Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the "OFF" position when released. For model HR2450F/HR2450/HR2451 To start the tool, simply pull the switch trigger. Tool speed is increased by increasing pressure on the switch trigger. For continuous operation, pull the switch trigger and then push in the lock button. To stop the tool from the locked position, pull the switch trigger fully, then release it. [. . . ] 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. The depth gauge cannot be used at the position where the depth gauge strikes against the gear housing. [. . . ]