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Photos and specs Makita 6905B |
manual abstract
An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord. Table 1: Minimum gage for cord Ampere Rating Volts Total length of cord in feet 120 V 25 ft. 50 ft. 100 ft. 150 ft. More Than Not More Than AWG 0 6 18 16 16 14 6 10 18 16 14 12 10 12 16 16 14 12 12 16 14 12 Not Recommended SPECIFIC SAFETY RULES SPECIFIC SAFETY RULES DO NOT let comfort or familiarity with product (gained from repeated use) replace strict adherence to impact wrench safety rules. If you use this tool unsafely or incorrectly, you can suffer serious personal injury. 1. Hold tool by insulated gripping surfaces 4. Hold the tool firmly. when performing an operation where the 5. Always be sure you have a firm footing. cutting tool may contact hidden wiring or Be sure no one is below when using the its own cord. Contact with a “live” wire will tool in high locations. make exposed metal parts of tool “live” and shock the operator. 6. The proper fastening torque may differ depending upon the kind or size of the 2. Wear ear protectors. bolt. Check the torque with a torque 3. Check the socket carefully for wear, wrench. cracks or damage before installation. SAVE THESE INSTRUCTIONS WARNING: MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury. FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION 1. Switch trigger ASSEMBLY 002336 1 2 1. Socket 2. Anvil OPERATION CAUTION: • Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool. Switch action CAUTION: • Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the “OFF” position when released. • Change the direction of rotation only when the tool comes to a complete stop. Changing it before the tool stops may damage the tool. The switch is reversible, providing either clockwise or counterclockwise rotation. To start the tool, simply pull the lower part of the switch trigger for clockwise or the upper part for counterclockwise. Release the switch trigger to stop. CAUTION: • Always be sure that the tool is switched off and unplugged before carrying out any work on the tool. Selecting correct socket Always use the correct size socket for bolts and nuts. An incorrect size socket will result in inaccurate and inconsistent fastening torque and/or damage to the bolt or nut. Installing or removing socket To install the socket, push it onto the anvil of the tool until it locks into place. To remove the socket, simply pull it off. The proper fastening torque may differ depending upon the kind or size of the bolt, the material of the workpiece to be fastened, etc. The relation between fastening torque and fastening time is shown in the figure. N.m Fastening time Fastening torque (ft.lbs) 400 (258) 300 (216) 200 (144) 100 (72) 0 1 2 3 4 5 6 7 8 (S) Rated voltage 90% of rated voltage N.m Fastening time Fastening torque (ft.lbs) 400 (258) 300 (216) 200 (144) 100 (72) 0 1 2 3 4 5 6 7 8 (S) Rated voltage 90% of rated voltage NOTE: • Hold the tool pointed straight at the bolt or nut. • Excessive fastening torque may damage the bolt/nut or socket. Before starting your job, always perform a test operation to determine the proper fastening time for your bolt or nut. The fastening torque is affected by a wide variety of factors including the following. After fastening, always check the torque with a torque wrench. 1. Voltage Voltage drop will cause a reduction in the fastening torque. 2. Socket • Failure to use the correct size socket will cause a reduction in the fastening torque. • A worn socket ( wear on the hex end or square end ) will cause a reduction in the fastening torque. 3. Bolt • Even though the torque coefficient and the class of bolt are the same, the proper fastening torque will differ according to the diameter of bolt. • Even though the diameters of bolts are the same, the proper fastening torque will differ according to the torque coefficient, the class of bolt and the bolt length. MAINTENANCE MAINTENANCE 1 1. Limit mark 002372 1 2 1. Screwdriver 2. Brush holder cap ACCESSORIES 4. The use of the universal joint or the extension bar somewhat reduces the fastening force of the impact wrench. Compensate by fastening for a longer period of time. 5. The manner of holding the tool or the material of driving position to be fastened will affect the torque. CAUTION: • Always be sure that the tool is switched off and unplugged before attempting to perform inspection or maintenance. Replacing carbon brushes Remove and check the carbon brushes regularly. Replace when they wear down to the limit mark. Keep the carbon brushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use only identical carbon br...