Dewalt DCS520T1 Instruction Manual - Page 14

English of kickback. Change blades when it is no longer easy to push the saw through the cut, when the motor is straining, or when excessive heat is built up in the blade. It is a good practice to keep extra blades on hand so that sharp blades are available for immediate use. Dull blades can be sharpened in most areas; see SAWS-SHARPENING in the yellow pages. Hardened gum on the blade can be removed with kerosene, turpentine, or oven cleaner. Anti-stick coated blades can be used in applications where excessive build-up is encountered, such as pressure treated and green lumber. Blade Selection (Fig. I) WARNING: To minimize the risk of kickback and to ensure proper cutting, the blade selected must be appropriate for the thickness of the riving knife provided. The blade supplied with this circular saw is the correct size for the riving knife supplied with the saw. If a different blade is used, check the blade body (plate) thickness and the blade kerf (cutting) width marked on the blade or on the blade packaging. The riving knife thickness must be greater than the body thickness and less than the kerf width as shown in Figure I. The riving knife provided with this saw is marked with its thickness; .067" (1.7 mm). This riving knife should only be used for blades with a 0.07" (1.8 mm) minimum kerf width and 0.063" (1.6 mm) maximum body thickness. Your DeWALT track saw is designed for use with 6-1/2" (165 mm) diameter blades that have a 0.79" (20 mm) diameter bore. Blades must be rated for 6000 rpm operation (or higher). DO NOT use any abrasive wheels. Fig. I Riving knife thickness Kerf width (width of cut made by the blade) Body (or plate) thickness of the blade A combination blade is furnished with your saw and is an excellent blade for all general ripping and crosscutting operations. Use a fine-tooth blade for cutting plywood. WARNING: VISUALLY EXAMINE CARBIDE BLADES BEFORE USE. REPLACE IF DAMAGED. Guide Rail System (Fig. A1, J) The guide rails 28 , which are available in different lengths, allow for precise, clean cuts and simultaneously protect the workpiece surface against damage. In conjunction with additional accessories, exact angled cuts, mitre cuts and fitting work can be completed with the guide rail system. Securing the workpiece with clamps ensures a secure hold and safe working. The guide clearance of the track saw must be very small for best cutting results and can be set with the two rail adjustment knobs 5 . 1. Release the screw inside the rail adjustment knobs 5 to adjust the clearance. 2. Adjust the knob until saw locks on rail. 3. Rotate knob back until saw slides easily. 4. Hold the rail adjustment knob in position and lock the screw again. NOTE: ALWAYS readjust the system for use with other rails. Anti-Splinter Guard (Fig. J, K) The guide rail 28 is equipped with an anti-splinter guard 30 , which has to be trimmed before the first use. The anti-splinter guard 30 is situated on each edge of the guide rail ( 28 , Fig. J). The purpose of this anti-splinter guard is to provide the user with a visible blade cut line while reducing the chipping that occurs along the workpiece cut edge during cutting. IMPORTANT: ALWAYS read and follow the Guide Rail System instructions before cutting the splinterguard! 1. Set the speed of the track saw to level 7. 2. Place the guide rail 28 on a scrap piece of wood. Use a clamp to ensure that the guide rail is securely attached to the workpiece. This will ensure accuracy. 3. Set the track saw on 13/64" (5 mm) cut depth. 4. Place the saw on the rear end of the guide rail. 5. Turn the saw on, press it down to the set cutting depth and cut the anti-splinter guard 30 along the full length in one continuous operation. The edge of the antisplinter guard now corresponds exactly to the cutting edge of the blade. To trim the anti-splinter guard on the other side of the guide rail, remove the saw from the rail and rotate the rail 180°. Repeat steps 1 through 4. NOTE: If desired, the splinter guard can be bevelled to 45°, then repeat steps 1 through 4. This allows one side of the rail for cutting parallel cuts and the other side of the rail is tuned in for 45° bevel cuts (Fig. K). NOTE: If the anti-splinter guard is trimmed for parallel cutting on both sides, then when the unit is bevelled, the blade will not run true to the edge of the anti-splinter guard. This is because the pivot point of the unit bevel is not stationary and the blade moves out when the unit is bevelled. WARNING: To reduce the risk of injury, ALWAYS secure the guide rail with a clamp. 12