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Фрагмент инструкции
SPINDLE SPEEDS Five spindle speeds of 620, 1100, 1720, 2340 and 3100 RPM are available with your drill press. The highest speed is obtained when the belt is on the largest step of the motor pulley and the smallest step of the spindle pulley, as shown in Fig. 25. Fig. 25, illustrates which step of the motor and spindle pulley the belt must be placed to obtain the five speeds available. B D Fig. 22 E F Fig. 23 SPINDLE MOTOR 3100 2340 1720 1100 620 Fig. 25 10 A B D C E A B D C E Fig. 27 CHANGING SPEEDS AND ADJUSTING BELT TENSION NOTE: A BELT POSITIONING SPEED CHART (E) FIG. 27, IS CONVENIENTLY LOCATED ON THE INSIDE TOP COVER OF THE DRILL PRESS. 1. Disconnect the drill press from the power source. 2. Lift up the belt and pulley guard (A) Fig. 27. 3. Release belt tension by loosening tension lock knob (B) Fig. 27, and pivoting the motor (D) toward the front of the drill press. 4. While holding the motor toward the front of the drill press head, position the belt (C) on the desired steps of the motor and spindle pulleys, as shown in Fig. 27. 5. After the belt is positioned on the desired steps of the motor and spindle pulleys, pivot motor (D) Fig. 27, away from the drill press head until the belt is properly tensioned and tighten tension lock knob (B). The belt should be just tight enough to prevent slipping. Excessive tension will reduce the life of the belt, pulleys and bearings. Correct tension is obtained when the belt (C) can be flexed about 1" out of line midway between the pulleys using light finger pressure. 11 DRILLING HOLES TO DEPTH Where a number of holes are to be drilled to exactly the same depth, the stop nuts on the threaded stop rod are used as follows: 1. Lower the spindle until the pointer (A) Fig. 28, lines up with the mark on the scale (B) you wish the depth to be. Then thread the lower stop nut (C) down to contact the depth stop (D) on the side of the head. Return the spindle to the up position and tighten the upper stop nut (E) against the lower stop nut (C). 2. Drill a test hole to check the adjustment and readjust if necessary. All holes will be drilled to the depth indicated by the setting of the lower stop nut (C) Fig. 28, as it contacts the depth stop (D) when the spindle is lowered. Fig. 28 E C B A D A D C B Fig. 29 ADJUSTING SPINDLE RETURN SPRING The spindle is automatically returned to its upper most position upon release of the handle. It is recommended that the handle be allowed to slowly return to the top position after all holes have been bored in the material. This spring has been properly adjusted at the factory and should not be disturbed unless absolutely necessary. To adjust the return spring, proceed as follows: WARNING: MAKE SURE THE TOOL IS DISCONNECTED FROM THE POWER SOURCE. 1. Loosen the two nuts (B) Fig. 29, approximately 1/4”. Do not remove nuts (B) from shaft (C). 2. While firmly holding spring housing (A) Fig. 29, pull out housing and rotate it until the boss (D) is engaged with the next notch on the housing. Turn the housing counter-clockwise to increase and clockwise to decrease spring tension. Then tighten the two nuts (B) to hold the housing in place. IMPORTANT: Inside nut (B) should not contact spring housing (A) when tight. 12 OPERATION Your drill press is to be used with drill bits of 1/2" or less in diameter. The following will give the inexperienced operator a start on common drill press operations. Use scrap material for practice to get a feel of the machine before attempting regular work. WARNING: The use of accessories and attachments not recommended by Delta may result in risk of injury. Fig. 30 C D B A INSTALLING AND REMOVING DRILL BITS 1. Insert smooth end of drill bit (A) Fig. 30, as far as it will go into the chuck (B), or up to the flutes for small bits. 2. Make certain that the drill bit (A) Fig. 30, is centered in the chuck (B) before tightening the chuck with the key (C). 3. Turn the chuck key (C) Fig. 30, clockwise to tighten and counterclockwise to loosen the chuck jaws. 4. Tighten all three chuck jaws to secure the drill bit sufficiently so that it does not slip while drilling. 5. MAKE SURE chuck key (C) Fig. 30, is removed from chuck before starting drill press. Your chuck key (C) is equipped with a self-ejecting pin (D) which eliminates the hazard of the key being left in the chuck. CORRECT DRILLING SPEEDS Factors which determine the best speed to use in any drill press operations are: material, size of hole, type of drill or other cutter, and quality of cut desired. The smaller the drill, the greater the RPM required. When drilling in soft materials, use a higher speed than what would be used for harder materials. 13 BORING IN WOOD Twist drills, although intended for metal drilling, may also be used for boring holes in wood. However, machine spur bits are generally preferred for wood working; they cut a flat bottom hole and are designed for removal of wood chips. Do not use hand bits which have a screw tip; at drill press speeds, they turn...