Dewalt DC411B Instruction Manual - Page 20

English Depressed center Type 27 grinding wheels must be used with included flanges. See pages 14 and 15 of this manual for more information. 1. Install the unthreaded backing flange (G) G on spindle (D) with the raised section (pilot) against the wheel. 2. Place wheel against the backing flange, centering the wheel on the raised section (pilot) of the backing flange. D 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 cen- H ter 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 1/4" (6.35 mm) WHEELS spindle so that the raised section (pilot) is not against the wheel. Clamp nut 4. While depressing the spindle lock button, tighten the clamp nut with a wrench. 5. To remove the wheel, depress the Backing flange spindle lock button and loosen the thread- ed clamp nut with a wrench. 1/8" (3.17 mm) NOTE: If the wheel spins after the clamp WHEELS 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 Clamp nut wheel, it will spin because the height of the pilot prevents the clamp nut from holding the wheel. Backing flange SURFACE GRINDING WITH GRINDING WHEELS 1. Allow the tool to reach full speed before 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. 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. 20˚-30˚ 5. Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down. EDGE GRINDING WITH GRINDING WHEELS WARNING: Wheels used for cutting and edge grinding may break or kick back 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" (13 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 pages 14 and 15 for more information. 1. Allow the tool to reach full speed before 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. 18