Ryobi HP108L Manual 1 - Page 8
Warning, Wood And Metal Drilling, Driving Screws - not working
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OPERATION WARNING: Make sure to insert the drill bit straight into the chuck jaws. Do not insert the drill bit into the chuck jaws at an angle, then tighten. This could cause the drill bit to be thrown from the drill, resulting in possible serious personal injury or damage to the chuck. Grasp and hold the collar of the chuck with one hand. With your other hand, rotate the chuck body to close and tighten the chuck jaws. WARNING: Do not hold the chuck body with one hand and use the power of the drill to tighten the chuck jaws on the drill bit. The chuck body could slip in your hand, or your hand could slip and come in contact with the rotating drill bit. This could cause an accident resulting in serious personal injury. To remove bits, lock the switch trigger and open the chuck jaws. DRIVING SCREWS See Figure 5, page 10. The drill has a built-in LED worklight. This feature is convenient when working in close or tight areas where additional light is needed. Whenever the switch trigger is depressed, the LED worklight will illuminate. NOTE: During normal operation, if the LED worklight will not illuminate, charge the drill. Check the direction of rotation selector for the correct setting (forward or reverse). Secure the workpiece in a vise or with clamps to keep it from turning as the bit rotates. Hold the drill firmly and place the bit at the point to be drilled, or where the screw is to be driven. WARNING: Do not drive a screw where there is likely to be hidden wiring behind the surface. Contact with a "live" wire will make exposed metal parts of the tool "live" and possibly shock the operator. If you must drive a screw where hidden wire may be present, always hold tool by insulated gripping surfaces (handle) when performing the operation to prevent a shock to the operator. WARNING: When drilling, be prepared for binding at bit breakthrough. When these situations occur, drill has a tendency to grab and kick opposite to the direction of rotation and could cause loss of control when breaking through material. If not prepared, this loss of control can result in possible serious injury. With hard, smooth surfaces, use a center punch to mark the desired hole location. This will prevent the bit from slipping off-center as the hole is started. If the bit jams in the workpiece or if the drill stalls, stop the tool immediately. Remove the bit from the workpiece and determine the reason for jamming. NOTE: This drill has an electric brake. When the switch trigger is released, the chuck stops turning. When the brake is functioning properly, sparks will be visible through the vent slots on the housing. This is normal and is the action of the brake. WOOD AND METAL DRILLING For maximum performance, use high speed steel bits for wood or metal drilling. Select drilling mode. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Wood Drilling 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 and Steel Drilling 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. Maintain a speed and pressure which allows cutting without overheating the bit. Applying too much pressure will: • Overheat the drill; • 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. Depress the switch trigger to start the drill. Move the bit into the workpiece, applying only enough pressure to keep the bit cutting or driving the screw. Do not force the drill or apply side pressure to elongate a hole. Let the tool do the work. 8 - English