Dewalt D25481K Instruction Manual - Page 7

• For metal, use high-speed steel twist drill bits or hole saws. Use a cutting lubricant when drilling metals. The exceptions are cast iron and brass which should be drilled dry. • For masonry, such as brick, cement, cinder block, etc., use carbide-tipped bits rated for percussion drilling. Inserting and Removing SDS Max Bits (Fig. C) 1. Pull back the locking sleeve 8 and insert the bit shank. The bit shank must be clean. 2. Turn the bit slightly until the sleeve snaps back into position. 3. Ensure the bit is properly engaged. NOTE: The bit needs to move several centimeters in and out of the bit holder 7 when properly engaged. Fig. C 8 7 To remove the bit, pull back the locking sleeve and pull the bit out. OPERATION WARNING: To reduce the risk of serious personal injury, turn unit off and disconnect it from power source before making any adjustments or removing/installing attachments or accessories. An accidental start-up can cause injury. Proper Hand Position (Fig. D) WARNING: To reduce the risk of serious personal injury, ALWAYS use proper hand position as shown. WARNING: To reduce the risk of serious personal injury, ALWAYS hold securely in anticipation of a sudden reaction. Proper hand position requires one hand on the mounted side handle, with the other hand on the main handle. Fig. D English SHOCKS Active Vibration Control® System For best vibration control, hold the tool as described in Proper Hand Position and apply just enough pressure so the damping device on the main handle is approximately mid stroke. The hammer only needs enough pressure to engage the active vibration control. Applying too much pressure will not make the tool actuate faster and active vibration control will not engage. Overload Clutch In case of jamming of a drill bit, the drive to the drill spindle is interrupted by the overload clutch. Due to the resulting forces, always hold the tool with both hands and take a firm stance. After the overload, release and depress the trigger to re-engage drive. WARNING: Drill may stall if overloaded causing a sudden twist. Always expect the stall. Grip the drill firmly to control the twisting action and avoid injury. Operation Modes (Fig. E) WARNING: Do not select the operating mode when  the tool is running. CAUTION: Never use in Rotary Drilling or Rotary Hammering mode with a chisel bit in the bit holder. Personal injury and damage to the the tool may result. Your tool is equipped with a mode selector dial 6 to select the mode appropriate to desired operation. Symbol Mode Application Rotary Drilling Screwdriving Drilling into steel, wood and plastics Rotary Drilling into concrete Hammering and masonry Hammering only Light chipping To select an operating mode: 1. Depress the mode selector release button 5 . 2. Rotate the mode selector dial so that the arrow points to the symbol corresponding for the desired mode. Fig. E 5 4 5