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The drilling depth is the distance between the tip of the bit and the tip of the depth gauge rod (Fig. 3). Fig. 3 Drilling Depth 3. Press the clamp down to secure the depth gauge. page 6 OPERATION To reduce the risk of injury, wear safety goggles or glasses with side shields. WARNING! Selecting Action (Fig. 4) MILWAUKEE Hawk Rotary Hammers have two settings: drilling or hammering with rotation. Drill Hammer Arrow Fig. 4 Hammer/ Drill Collar Chuck Collar 1. For drilling, turn the hammer/drill collar so that the twist drill symbol lines up with the arrow on the chuck collar. 2. For hammering with rotation, turn the hammer/drill collar so that the hammer symbol lines up with the arrow on the chuck collar. NOTE: To engage the hammering mechanism, maintain pressure on the bit. When pressure on the bit is released, the hammering action will stop. Using the Forward/Reverse Switch (Fig. 5) Fig. 5 Forward/Reverse switch Forward Reverse 1. For forward (clockwise) rotation, push the forward/reverse switch to the left. 2. For reverse (counterclockwise) rotation, push the forward/reverse switch to the right. An interlock prevents switching to reverse while pulling the trigger. To prevent damage to the gears and motor, allow the tool to coast to a full stop before reversing. Starting, Stopping & Controlling Speed 1. To start the tool, pull the trigger. 2. To stop the tool, release the trigger. 3. To vary the driving speed, simply increase or decrease pressure on the trigger. The further the trigger is pulled, the greater the speed. Cold Starting If this tool is stored for a long period of time or at cold temperatures, it may not hammer initially because the lubrication has become stiff. To warm up the tool: 1. Insert and lock a bit into the tool. 2. Turn the tool on, applying force to the bit against a concrete or wood surface. 3. Turn the tool on and off every few seconds. In a short time, the tool will start hammering. The colder the tool is, the longer it will take to warm it up. Operating Position the tool, grasp the handles firmly and pull the trigger. Always hold the tool securely using both handles and maintain control. Use only enough pressure to hold the tool in place and prevent the tip of the bit from wandering. This tool has been designed to achieve top performance with only moderate pressure. Let the tool do the work. If the speed begins to drop off when drilling deep holes, pull the bit partially out of the hole while the tool is running to help clear dust. NOTE: Do not use water to settle the dust since it will clog the bit flutes and tend to make the bit bind in the hole. If the bit should bind, a built-in, non-adjustable slip clutch prevents the bit from turning. If this occurs, stop the tool, free the bit and begin again. Using Rotary Percussion Core Bits (Fig. 6-9) Core bits are useful for drilling large holes for conduit and pipe. MILWAUKEE Heavy-Duty Core Bits have heat-treated steel bodies with durable carbide tips. These core bits are specially designed for fast, accurate drilling with combined hammering and rotary action. 1. Clean and lubricate the threads on the adapter and core bit to make later removal easier. Screw the threaded end of the adapter into the rear of the core bit. 2. Push the guide plate onto the pointed end of the center pin. Insert the center pin and guide plate assembly into the core bit. Be sure the small end of the center pin is securely placed into the hole in the center of the core bit (Fig. 6). Fig. 6 3. Insert the adapter into the nose of the tool as described in “Installing Bits”. Set the stop rotation knob to the hammering-with-rotation setting. 4. Press the center pin firmly against your center mark, hold the tool firmly and pull the trigger (Fig. 7). Fig. 7 page 7 NOTE: If a center pin and guide plate are not available, use a template or notched board to start the hole (Fig. 8). Fig. 8 5. After drilling to about the depth of the core bit teeth, remove the center pin and guide plate from the core bit. Resume drilling 6. To change the core bit, hold the tool upwards, pointing it away from your body as shown, and run it briefly in forward to loosen the core bit from the adapter (Fig. 9). Fig. 9 NOTE: To make deeper holes, remove the core bit, break and remove the core. Resume drilling. page 8 MAINTENANCE WARNING! To reduce the risk of injury, always unplug your tool before performing any maintenance. Never disassemble the tool or try to do any rewiring on the tool's electrical system. Contact a MILWAUKEE service facility for ALL repairs. MAINTENANCE WARNING! To reduce the risk of injury, always unplug your tool before performing any maintenance. Never disassemble the tool or try to do any rewiring on the tool's electrical system. Contact a MILWAUKEE service facility for ALL repairs. Maintaining Tools Keep your tool in good repair by adopting a regular maintenance program. Before use, examine the general condition of your tool. Inspect guards, switches, tool cord set and ...

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