Sander MODEL GA7911 INSTRUCTION MANUAL WARNING: For your personal safety, READ and UNDERSTAND before using. SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE. w w w. m a k i t a t o o l s . c o m SPECIFICATIONS Model No load speed (RPM) Overall length Net weight Spindle thread GA7911 6,000/min 412 mm (16-1/4") 5.5 kg (12.1 lbs) 5/8" · Manufacturer reserves the right to change specifications without notice. · Specifications may differ from country to country. GENERAL SAFETY RULES (For All Tools) USA001-2 WARNING: Read and understand all instructions. Failure to follow all instructions listed below, may result in electric shock, fire and/or serious personal injury. SAVE THESE INSTRUCTIONS Work Area 1. Keep your work area clean and well lit. Cluttered benches and dark areas invite accidents. 2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes. 3. Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. Electrical Safety 4. Grounded tools must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances. Never remove the grounding prong or modify the plug in any way. Do not use any adaptor plugs. Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. If the tools should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user. 2 5. Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is grounded. 6. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. 7. Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet. Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock. 8. When operating a power tool outside, use an outdoor extension cord marked "W-A" or "W". These cords are rated for outdoor use and reduce the risk of electric shock. 14. Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for appropriate conditions. Ordinary eye or sun glasses are NOT eye protection. Tool Use and Care 15. Use clamps or other practical way to secure and support the workpiece to a stable platform. Holding the work by hand or against your body is unstable and may lead to loss of control. 16. Do not force tool. Use the correct tool for your application. The correct tool will do the job better and safer at the rate for which it is designed. 17. Do not use tool if switch does not turn it on or off. Any tool that cannot be controlled with the switch is dangerous and must be repaired. 18. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the tool. Such preventive safety measures reduce the risk of starting the tool accidentally. 19. Store idle tools out of reach of children and other untrained persons. Tools are dangerous in the hands of untrained users. 20. Maintain tools with care. Keep cutting tools sharp and clean. Properly maintained tools with sharp cutting edges are less likely to bind and are easier to control. 21. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tools operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly maintained tools. 22. Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable for one tool, may become hazardous when used on another tool. Personal Safety 9. Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in serious personal injury. 10. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts. 11. Avoid accidental starting. Be sure switch is off before plugging in. Carrying tools with your finger on the switch or plugging in tools that have the switch on invites accidents. 12. Remove adjusting keys or wrenches before turning the tool on. A wrench or a key that is left attached to a rotating part of the tool may result in personal injury. 13. Do not overreach. Keep proper footing and balance at all times. Proper footing and balance enables better control of the tool in unexpected situations. 3 SERVICE 23. Tool service must be performed only by qualified repair personnel. Service or maintenance performed by unqualified personnel could result in a risk of injury. 24. When servicing a tool, use only identical replacement parts. Follow instructions in the Maintenance section of this manual. Use of unauthorized parts or failure to follow Maintenance instructions may create a risk of electric shock or injury. USE PROPER EXTENSION CORD: Use only three-wire extension cords that have threeprong grounding-type plugs and three-pole receptacles that accept the tool's plug. Make sure your extension cord is in good condition. Replace or repair damaged or worn cord immediately. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. 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 More Than 0 6 10 12 Not More Than 6 10 12 16 18 18 16 14 Volts 120 V 25 ft. Total length of cord in feet 50 ft. 100 ft. 150 ft. AWG 16 16 16 12 16 14 14 12 14 12 Not Recommended GROUNDING INSTRUCTIONS This tool should be grounded while in use to protect the operator from electric shock. The tool is equipped with a three-conductor cord and three-prong grounding type plug to fit the proper grounding type receptacle. The green (or green and yellow) conductor in the cord is the grounding wire. Never connect the green (or green and yellow) wire to a live terminal. Your unit is for use on 120 volts and has a plug that looks like Fig. "A". 4 An adapter Fig. "B" and "C" is available for connecting Fig. "A" type plugs to two-prong receptacles. The green-colored rigid ear, lug, etc., extending from the adapter must be connected to a permanent ground, such as a properly grounded outlet box. GROUNDING METHODS ADAPTER GROUNDED OUTLET METAL SCREW GROUNDING PIN GROUNDED OUTLET BOX TAB FOR GROUNDING SCREW Fig. A Fig. B Fig. C SPECIFIC SAFETY RULES USB038-5 DO NOT let comfort or familiarity with product (gained from repeated use) replace strict adherence to sander safety rules. If you use this tool unsafely or incorrectly, you can suffer serious personal injury. 1. Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other accessories running over rated speed can fly apart and cause injury. 2. Hold tool by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or its own cord. Contact with a "live" wire will make exposed metal parts of the tool "live" and shock the operator. 3. Always use safety glasses or goggles. Ordinary eye or sun glasses are NOT safety glasses. 4. Use only flanges specified for this tool. 5. NEVER use tool with wood cutting blades or other sawblades. Such blades when used on a sander frequently kick and cause loss of control leading to personal injury. 6. Hold the tool firmly. 7. Keep hands away from rotating parts. 8. Be careful not to damage the spindle, the flange (especially the installing surface) or the lock nut. Damage to these parts could result in wheel breakage. 9. Make sure the abrasive disc or the wheel is not contacting the workpiece before the switch is turned on. 10. Watch out for flying sparks. Hold the tool so that sparks fly away from you and other persons or flammable materials. 5 11. Do not leave the tool running. Operate the tool only when hand-held. 12. Do not touch the workpiece immediately after operation; it may be extremely hot and could burn your skin. 13. Ventilate your work area adequately when you perform sanding operations. 14. ALWAYS wear proper apparel including long sleeve shirts, leather gloves and shop aprons to protect skin from contact with hot grindings. 15. Use of this tool to grind or sand some products, paints and wood could expose user to dust containing hazardous substances. Use appropriate respiratory protection. IF USED AS A GRINDER 16. Always use proper guard with grinding wheel. A guard protects operator from broken wheel fragments. 17. When using depressed center grinding wheels, be sure to use only fiberglassreinforced wheels. 18. Check the wheel carefully for cracks or damage before operation. Replace cracked or damaged wheel immediately. Run the tool (with guard) at no load for about a minute, holding tool away from others. If wheel is flawed, it will likely separate during this test. 19. Before using the tool on an actual workpiece, let it run for a while. Watch for vibration or wobbling that could indicate poor installation or a poorly balanced wheel. 20. Use the specified surface of the wheel to perform the grinding. SAVE THESE INSTRUCTIONS WARNING: MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury. 6 FUNCTIONAL DESCRIPTION · CAUTION: Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool. 001028 Shaft lock · CAUTION: Never actuate the shaft lock when the spindle is moving. The tool may be damaged. 1 Press the shaft lock to prevent spindle rotation when installing or removing accessories. 1. Shaft lock 001043 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. Switch can be locked in "ON" position for ease of operator comfort during extended use. Apply caution when locking tool in "ON" position and maintain firm grasp on tool. 2 1. Switch trigger 2. Lock button 1 · To start the tool, simply pull the switch trigger. Release the switch trigger to stop. For continuous operation, pull the switch trigger and then push in the lock button. To stop the tool from the locked position, pull the switch trigger fully, then release it. 7 ASSEMBLY · CAUTION: Always be sure that the tool is switched off and unplugged before carrying out any work on the tool. 001059 Installing side grip (handle) · CAUTION: Always be sure that the side grip is installed securely before operation. Screw the side grip securely on the position of the tool as shown in the figure. 001114 1 2 3 Installing or removing abrasive disc (optional accessory) NOTE: · Use sander accessories specified in this manual. These must be purchased separately. 1. Lock nut 2. Abrasive disc 3. Rubber pad 001621 Mount the rubber pad onto the spindle. Fit the disc on the rubber pad and screw the lock nut onto the spindle. 1 To tighten the lock nut, press the shaft lock firmly so that the spindle cannot revolve, then use the lock nut wrench and securely tighten clockwise. To remove the disc, follow the installation procedure in reverse. 2 1. Lock nut wrench 2. Shaft lock IF USED AS A GRINDER NOTE: · Use grinder accessories specified in this manual. These must be purchased by separate. WARNING: Always use guard assembly or accessory kit, noted below, for type 27 depressed center grinding wheel/ Multi-disc. · 8 · Guard assembly Part No. 191214-3 ... For 180 mm (7") Part No. 191215-1 ... For 230 mm (9") Guard accessory kit Part No. 191228-2 ... For 180 mm (7") Part No. 191231-3 ... For 230 mm (9") 001066 Installing or removing wheel guard · CAUTION: When using a depressed center grinding wheel/Multidisc, flex wheel or wire wheel brush, the wheel guard must be fitted on the tool so that the closed side of the guard always points toward the operator. 1 23 1. Wheel guard 2. Bearing box 3. Screw Mount the wheel guard with the protrusion on the wheel guard band aligned with the groove on the bearing box. Be sure to tighten both screws securely. To remove wheel guard, follow the installation procedure in reverse. 001078 1 2 3 Installing or removing depressed center grinding wheel/Multi-disc (optional accessory) · WARNING: Always use optional gu ...