Dewalt DCG412B Instruction Manual - Page 21

English 2. Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Grinding rate is greatest when the tool operates at high speed. FIG. 12 3. Position yourself so that the openunderside of the wheel is facing away from you. 4. Once a cut is begun and a notch is established in the workpiece, do not change the angle of the cut. Changing the angle will cause the wheel to bend and may cause wheel breakage. Edge grinding wheels are not designed to withstand side pressures caused by bending. 5. Remove the tool from the work surface before turning the tool off. Allow the tool to stop rotating before laying it down. WARNING: Do not use edge grinding/cutting wheels for surface grinding applications because these wheels are not designed for side pressures encountered with surface grinding. Wheel breakage and serious personal injury may result. SURFACE FINISHING WITH SANDING FLAP DISCS 1. Allow the tool to reach full speed before touching the tool to the work surface. 2. Apply minimum pressure to work surface, allowing the tool to operate at high speed. Sanding rate is greatest when the tool operates at high speed. 3. Maintain a 5° to 10° angle between the FIG. 13 tool and work surface. 4. Continuously move the tool in a forward and back motion to avoid creating gouges in the work surface. 5˚-10˚ 5. Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down. MOUNTING SANDING BACKING PADS WARNING: To reduce the risk of serious personal injury, turn tool off and remove the battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start-up can cause injury. NOTE: Guard may be removed when using sanding backing pads. WARNING: Proper guard must be reinstalled for grinding wheel, cutting wheel, sanding flap disc, wire brush or wire wheel applications after sanding applications are complete. 1. Place or appropriately thread backing FIG. 14 pad (Q) on the spindle. 2. Place the sanding disc (R) on the S R backing pad (Q). 3. While depressing the spindle lock button,thread clamp nut (S) on spindle, piloting the raised hub on the clamp nut into the center of sanding disc and backing pad. 4. Tighten the clamp nut by hand. Then depress the spindle lock button while turning the sanding disc until the sanding disc and clamp nut are snug. Q 5. To remove the wheel, grasp and turn the backing pad and sanding disc while depressing the spindle lock button. USING SANDING BACKING PADS Choose the proper grit sanding discs for your application. Sanding discs are available in various grits. Coarse grits yield faster material removal rates and a rougher finish. Finer grits yield slower material removal and a smoother finish. 19