Dewalt D28065N Instruction Manual - Page 16

English 2. Place wheel against the backing flange, centering the wheel on the raised section (pilot) of the backing flange. 3. While depressing the spindle lock button, thread the clamp nut (H) on spindle. If the wheel you are installing is more than 1/8" (3.17 mm) thick, place the threaded clamp nut on the spindle so that the raised section (pilot) fits into the center of the wheel. If the wheel you are installing is 1/8" (3.17 mm) thick or less, place the threaded clamp nut on the spindle so that the raised section (pilot) is not against the wheel. 4. While depressing the spindle lock button, tighten the clamp nut with a wrench. 5. To remove the wheel, depress the spindle lock button and loosen the threaded clamp nut with a wrench. NOTE: If the wheel spins after the clamp nut is tightened, check the orientation of the threaded clamp nut. If a thin wheel is installed with the pilot on the clamp nut against the wheel, it will spin because the height of the pilot prevents the clamp nut from holding the wheel. FIG. 8 1/4" wheels (6.35 mm) threaded clamp nut Quick-Change backing flange 1/8" wheels (3.17 mm) SURFACE GRINDING WITH GRINDING WHEELS (FIG. 9) 1. Allow the tool to reach full speed before touching the tool to the work surface. threaded clamp nut 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. Quick-Change backing flange 3. Maintain a 20˚ to 30˚ angle between the tool and work surface. 4. Continuously move the tool in a forward and back motion to avoid creating gouges in the work surface. 5. Remove the tool from work surface before FIG. 9 turning tool off. Allow the tool to stop rotating before laying it down. EDGE GRINDING WITH GRINDING WHEELS (FIG. 10) 20˚-30˚ CAUTION: Wheels used for cutting and edge grinding may break if they bend or twist while the tool is being used to do cut-off work or deep grinding. To reduce the risk of serious injury, limit the use of these wheels with a standard Type 27 guard to shallow cutting and notching [less than 1/2" (12.7 mm) in depth]. The open side of the guard must be positioned away from the operator. For deeper cutting with a Type 1 cut-off wheel, use a closed, Type 1 guard. See the chart on page 10 for more information. Type 1 guards are available at extra cost from your local dealer or authorized service center. 1. Allow the tool to reach full speed before FIG. 10 touching the tool to the work surface. 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. 3. Position yourself so that the open- underside 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. 14