Makita BTP140Z Owners Manual - Page 9

4. The manner of holding the tool or the material of driving position to be fastened will affect the torque. NOTE: 5. Operating the tool at low speed will cause a reduction in the fastening torque. Hammer drilling operation CAUTION: • There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole breakthrough, when the hole becomes clogged with chips and particles, or when striking reinforcing rods embedded in the concrete. To drill in the concrete or tiles, first, turn the action mode changing lever so that the arrow on the lever points to the mark on the tool body. The adjusting ring can be aligned in any torque levels for this operation. Be sure to use a tungsten-carbide tipped bit. Position the bit at the desired location for the hole, then pull the switch trigger. Do not force the tool. Light pressure gives best results. Keep the tool in position and prevent it from slipping away from the hole. Do not apply more pressure when the hole becomes clogged with chips or particles. Instead, run the tool at an idle, then remove the bit partially from the hole. By repeating this several times, the hole will be cleaned out and normal drilling may be resumed. CAUTION: • If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery. Screwdriving operation CAUTION: • Adjust the adjusting ring to the proper torque level for your work. When driving small wood screws or machine screws. set the action mode changing lever to the mark. Adjust the adjusting ring to the proper torque level for your work. Place the point of the driver bit in the screw head and apply pressure to the tool. Start the tool slowly and then increase the speed gradually. Release the switch trigger as soon as the clutch cuts in. CAUTION: • Make sure that the driver bit is inserted straight in the screw head, or the screw and/or bit may be damaged. • If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery. • When driving wood screws, predrill pilot holes to make driving easier and to prevent splitting of the workpiece. See the chart. 001904 Nominal diameter of wood screw Recommended size of pilot hole (mm) (mm) 3.1 (1/8") 2.0 - 2.2 (5/64" - 3/32") 3.5 (9/64") 2.2 - 2.5 (3/32" - 3/32") 3.8 (5/32") 2.5 - 2.8 (3/32" - 7/64") 4.5 (11/64") 2.9 - 3.2 (7/64" - 1/8") 4.8 (3/16") 3.1 - 3.4 (1/8" - 9/64") 5.1 (13/64") 3.3 - 3.6 (1/8" - 9/64") 5.5 (7/32") 5.8 (7/32") 3.7 - 3.9 (9/64" - 5/32") 4.0 - 4.2 (5/32" - 11/64") 6.1 (15/64") 4.2 - 4.4 (11/64" - 11/64") Drilling operation First, set the action mode changing lever so that the pointer points to to the mark or the mark. The mark is for low speed rotation and the mark is for high. The adjusting ring can be aligned in any torque levels for this operation. Then proceed as follows. Before operation, always make sure that the lever is correctly set to your desired mode mark and use the tool at an appropriate speed for your work. Then proceed as follows. Drilling in wood When drilling in wood, the best results are obtained with wood drills equipped with a guide screw. The guide screw makes drilling easier by pulling the bit into the workpiece. Drilling in metal To prevent the bit from slipping when starting a hole, make an indentation with a center-punch and hammer at the point to be drilled. Place the point of the bit in the indentation and start drilling. Use a cutting lubricant when drilling metals. The exceptions are iron and brass which should be drilled dry. CAUTION: • Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your bit, decrease the tool performance and shorten the service life of the tool. • There is a tremendous force exerted on the tool/bit at the time of hole break through. Hold the tool firmly and exert care when the bit begins to break through the workpiece. • A stuck bit can be removed simply by setting the reversing switch to reverse rotation in order to back out. However, the tool may back out abruptly if you do not hold it firmly. • Always secure small workpieces in a vise or similar hold-down device. 9