User manual DRILL DOCTOR 500

[. . . ] OPERATING INSTRUCTIONS & DRILL INFORMATION MODEL 750SP CONTENTS Warranty Congratulations Quick Steps Instructions Maintenance Quick Facts Replacement Parts Troubleshooting 1 2 3 4 7 8 9 10 US Patents D385567, & 4, 471, 581 5, 735, 732 & 5, 400, 546 other Patents Pending US DEPARTMENT OF LABOR Form Approved Occupational Safety and Health Administration OMB No. 44-R1367 IMPORTANT SAFETY INSTRUCTIONS REMEMBER, FOR YOUR OWN SAFETY, READ INSTRUCTION MANUAL BEFORE OPERATING TOOL. Follow instructions entitled "Replacing The Grinding Wheel" in this Instruction Manual. Follow instructions entitled "Drill Doctor Maintenance" in this Instruction Manual. [. . . ] NOTE: The rule of thumb is "it's better to grind off not enough rather than too much". If the drill point is over-split, try re-sharpening in the sharpening tube to reduce the over-split. If this doesn't work repeat steps #2 ­ #4. Flats Sharpening Short or Small Diameter Drill Bits A. Push the paddle back, and insert the individual drill bit into the alignment tube all the way to the drill stop. Release the paddle and turn the drill bit until it is secured by the pawls and pointing straight out (see Figure 16). Continue to hold the drill bit with one hand and carefully slide the chuck onto the drill bit with the other (See Figure 17). Align the flats on the chuck with the flats in the alignment tube and push the chuck all the way in until the flats on the chuck are entirely hidden. If not, turn the chuck knob counter clockwise to straighten (See Figure 18). NOTE: Too many rotations on small diameter bits will result in a negative rake angle. Example: 3/8" rotate (16-20) 180 degree turns, 1/8" rotate (4-6) and 3/32" (2-4). Fig. 19 NOTE: When aligning the masonry drill bit , the pawls are not used in the alignment Fig. Push the paddle back to the housing and insert the drill bit to the stop, then release the paddle. Grasp the shank end of the drill bit and rotate it so that the right cutting lip is high in a 2 o'clock position (See Figure 19 and 20). NOTE: The masonry drill bit may also require fewer rotations than similar diameter standard drill bits. 6 DRILL DOCTOR® MAINTENANCE MAINTENANCE Fig. 21 After sharpening many drill bits, the drill bit grinding dust will accumulate in the grinding compartment. Grinding particles will promote wear in the three tubes and chucks, so cleaning on a consistent basis can add life to your machine. Before any maintenance or cleaning is performed, be sure to unplug your Drill Doctor®. With a dry cloth wipe the inside and outside of the three tubes to remove any grinding dust that may have accumulated. To empty the drill bit grinding dust remove the black cover from the top of the machine. Using the narrow end of the wrench provided (or a flat head screwdriver) insert into the slot on the rear of the machine and use a twisting motion to pry the cover off. Shake accumulated drill bit grinding dust into a disposable container. Dispose of container and drill bit dust in a safe and environmentally approved manner. [. . . ] After aligning the small drill, look into the back of the chuck and notice if the jaws are straight to each other. If the jaws are twisted in a spiral direction, grasp the closing knob and very carefully turn it counter clockwise to straighten the jaws. The most common cause of improper sharpening is not aligning the drill in the chuck properly. In order to correct these problems be sure the chuck is all the way in the alignment tube with the flats entirely hidden. [. . . ]