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SPINDLE SPEEDS Twelve spindle speeds are available on the drill press. Fig. 23, illustrates the speeds and which steps of the pulleys the belts must be positioned to obtain the 12 speeds. Fig. 21 Fig. 22 SPINDLE CENTER MOTOR 540 360 250 1090 590 410 1820 1280 650 3000 2180 1450 Fig. 23 11 CHANGING SPINDLE SPEEDS AND ADJUSTING BELT TENSION 1. DISCONNECT THE DRILL PRESS FROM THE POWER SOURCE. 2. Raise the belt and pulley guard (A) Fig. 24. 3. Release tension on the belt by loosening lock knob (B) Fig. 24, and the tension knob located on the other side of the head casting and moving tension lever (C) forward. 4. Position both belts (D) Fig. 24, on the desired steps of the spindle, center, and motor pulleys as shown. Refer to chart (E) Fig. 24, which is conveniently located on the underside of the belt and pulley guard (A) for belt position and speed charts. 5. After the belts are positioned on the desired steps of the spindle, center, and motor pulleys, move tension lever (C) Fig. 25, to the rear until the belts are properly tensioned and tighten two tension lock knobs (B), one of which is shown. NOTE: The belts 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 belts (D) can be flexed approximately one inch at the center of the pulleys using light finger pressure. Fig. 24 A C B E D Fig. 25 C B DD DRILLING HOLES TO DEPTH When a number of holes are to be drilled to exactly the same depth, a depth stop is provided in the pinion shaft housing and is used as follows: 1. Loosen lock screw (A) Fig. 26, and rotate housing (B) until the pointer (C) lines up with the desired depth indicated on scale (D). Then tighten lock screw (A). 2. All holes will then be drilled to the exact depth as indicated on scale (D) Fig. 26. NOTE: Scale (D) is calibrated in both inches and millimeters. Fig. 26 A B C D 12 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 drilled 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: 1. Disconnect the tool from the power source. 2. Loosen the two nuts (B) Fig. 27, approximately 1/4”. Do not remove nuts (B) from shaft (C). 3. While firmly holding spring housing (A) Fig. 28, 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. OPERATIONS Your Drill Press should be used with drill bits that have shank diameters of 5/8" or less. The following directions 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. IMPORTANT: After installing a drill bit into the chuck, always tighten the jaws of the chuck using the key supplied in all three locations of the chuck, two of which are shown at (E) Fig. 30. IMPORTANT: When the workpiece is long enough, it should always be positioned on the table with one end against the column, as shown in Fig. 30. This prevents the workpiece from rotating with the drill bit or cutting tool, causing damage to the workpiece or personal injury to the operator. If it is not possible to support the workpiece against the column, the workpiece should always be fastened to the table using clamps or a vise. Fig. 27 B C A D A B Fig. 28 E E Fig. 30 13 INSTALLING AND REMOVING DRILL BITS 1. Insert smooth end of drill bit (A) Fig. 31, as far as it will go into the chuck (B), and then back the bit out 1/16”, or up to the flutes for small bits. 2. Make certain that the drill bit (A) Fig. 31, is centered in the chuck (B) before tightening the chuck with the key (C). 3. Turn the chuck key (C) Fig. 31, 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. 31, is removed from chuck before starting drill press. Your chuck key (C) is equipped with a self-ejecting pin (D) which eliminates Fig. 31 the hazard of the key being left in the chuck. 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 working in wood; they cut a square bottom hole and are designed for removal of woodchips. Do not use hand bits which have a screw tip; at drill press speeds they turn into the wood so rapidly as to lift the work off the table and whirl it. For through boring,...