Craftsman 10137 Operation Manual - Page 13

A WARNING: Before connecting the hammer drill to a power supply source, always check to be sure it is not in lock-on position (depress and release the variable speed switch). Failure to ensure that it is not locked-on could result in accidental starting of the drill resulting in possible serious injury. Do not lock the variable speed switch in applications where the drill may need to be suddenly stopped. DRILLING See Figures 7 - 8. Levels are located on the top and end of the motor housing to help keep the drill bit level during use. [] Depress and release the variable speed switch to be sure the drill is in the OFF position before connecting it to a power supply. [] Check the direction of rotation selector for the correct setting (forward or reverse). [] Secure the material to be drilled in a vise or with clamps to keep it from turning as the drill bit rotates. [] Plug the hammer drill into power supply. Hold the drill firmly and place the bit at the point to be drilled. [] Depress the variable speed switch to start the drill. Do not lock the variable speed switch ON for applications where the drill may need to be stopped suddenly. [] Move the drill bit into the workpiece, applying only enough pressure to keep the bit cutting. Do not force the drill or apply side pressure to elongate a hole. Let the tool do the work. A WARNING: Be prepared for binding at bit break- through. When these situations occur, the drill has a tendency to grab and kick in the opposite direction and could cause loss of control when breaking through material. This loss of control can result in possible serious injury. Do not lock the variable speed switch ON in applications where the drill may need to be stopped suddenly. [] 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 drill stalls, stop the tool immediately. Remove the bit from the workpiece and determine the reason for jamming. END ViEW Fig. 7 WOOD DRILLING [] For maximum performance, use high speed steel bits for wood drilling. [] Select normal 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. [] Do not lock the variable speed switch ON for applications where the drill may need to be stopped suddenly. 13