Ryobi SDS60K English Manual - Page 14
Warning, Masonry Drilling
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OPERATION WARNING: Be prepared for binding at bit breakthrough. When these situations occur, the rotary hammer has a tendency to grab and kick in the opposite direction and could cause loss of control when breaking through material. If not prepared, this loss of control can result in possible serious injury. When drilling hard, smooth surfaces, use a center punch to mark the desired hole location. This will prevent the drill bit from slipping off-center as the hole is started. When drilling metals, use a light oil on the drill bit to keep it from overheating. The oil will prolong the life of the bit and increase the drilling action. If the bit jams in the workpiece or if the rotary hammer stalls, stop the tool immediately. Remove the bit from the workpiece and determine the reason for jamming. WOOD DRILLING For maximum performance, use high speed steel bits for wood drilling. Select drilling mode. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Increase the speed as the drill bit bites into the material. When drilling through holes, place a block of wood behind the workpiece to prevent ragged or splintered edges on the back side of the hole. METAL DRILLING For maximum performance, use high speed steel bits for metal or steel drilling. Select drilling mode. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Maintain a speed and pressure which allows cutting without overheating the bit. Applying too much pressure will: • Overheat the rotary hammer; • Wear the bearings; • Bend or burn bits; and • Produce off-center or irregular-shaped holes. When drilling large holes in metal, start with a small bit, then finish with a larger bit. Also, lubricate the bit with oil to improve drilling action and increase bit life. MASONRY DRILLING For maximum performance, use carbide-tipped masonry impact bits when drilling holes in brick, tile, concrete, etc. Slide adjustment button on rotary hammer left for hammer drill mode. Apply light pressure and medium speed for best results in brick. Apply additional pressure for hard materials such as concrete. When drilling holes in tile, practice on a scrap piece to determine the best speed and pressure. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. CHISELLING When using the chisel feature on the rotary hammer, use only approved chisel bits. The supplied chisel bit will work with the SDS chuck only. Chisel only approved materials such as ceramics, concrete, brick, or other masonry. 14