Assessments - 5, GPA: 4.8
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Make sure it is firmly clamped and has been properly mounted. Refer to page 14 of this manual for Depressed Center Wheel Assembly and Disassembly. 8. Test the grinder before using Before actually beginning the grinding work, test the grinder by first clearing the area of all other personnel. Make sure the wheel guard is in place and that you are wearing eye protection. Turn the grinder “on”, and make sure the grinder runs smoothly and shows no abnormalities. Duration of the trial run is as follows: When depressed center wheel is replaced .................. 3 minutes or more When starting daily work .............................................. 1 minute or more 9. Use only properly rated depressed center wheels Use only depressed center wheels rated at 6600 RPM or more. Using a depressed center wheel rated less can lead to wheel disintegration during operation and cause serious bodily injury. 10. Check the push button Make sure that the push button is disengaged by pushing push button two or three times before turning on the grinder. (Fig. 5) Locating Pin Lever Set Piece Wheel Guard Across Packing Gland Flats English GRINDER OPERATION 1. Hold the grinder firmly by its handle and side handle (Fig. 1) The grinder produces a counterforce which must be controlled by firmly holding onto the grinder. 2. Turn the grinder “on” (Fig. 3) While holding the grinder firmly, use one finger to switch to the “on” position. Switch ON: Push the locking button forward and then press the switch lever. *For continuous use, press the Locking Lever switch lever. The switch lever Button is locked by pushing the locking button forward once Fig. 3 again. (*Subject to change depending on area.) Switch OFF: Press and release the switch lever. 3. Use light grinding pressure There is no need to press hard when grinding. Usually the grinder’s own weight is sufficient to allow the required light contact with the surface to be ground. WARNING: Do not press the grinder forcibly against the surface to be ground. Heavy pressure can result in wheel breakage and serious injury. It can also damage the surface being ground or damage the grinder’s motor. 4. Use proper grinding angle Grind only with the wheel’s edge by lifting the grinder 15° to 30°, as shown in Fig. 4. CAUTION: . Do not use the entire surface of the depressed center wheel. Use only the edge of the depressed center wheel. Switch 5. Move the grinder in the proper direction When using a new depressed center wheel in direction A (Fig. 4), the wheel edge may cut into the workpiece. In this case, grind in direction B (Fig. 4). Once the wheel edge is worn, the workpiece can be ground in both directions. NOTE: The wheel provided (resinoid wheel) is rated as Class A grain and # 24 grain size. It is most suitable for heavy grinding of steel and other types of materials. 6. Adjust operation to desired finish For a fine finish, decrease pressure by lifting slightly. Grind slowly and at the appropriate speed. Fig. 4 15°–30° A B English CAUTION: . The revolving depressed center wheel will create air turbulence. Do no lay the grinder down in areas of dust or dirt until it has come to a complete stop. DEPRESSED CENTER WHEEL ASSEMBLY AND DISASSEMBLY WARNING: Never attempt to assemble or disassemble the depressed center wheel, unless the power switch is in the “OFF” position and the electrical cord has been disconnected from the receptacle. 1. Assembly (1) Turn the disc grinder upsidedown so that the spindle is facing upward. (2) Align the oval-shaped indentation of the wheel washer with the notched part of the spindle, then attach them. (3) Fit the protuberance of the depressed center wheel onto the wheel washer. (4) Screw the wheel nut onto the spindle. (5) While pushing the push button with Wrench one hand, lock the spindle by turning the depressed center wheel slowly with Tightenthe other hand. Wheel Nut Tighten the wheel nut by using the supplied wrench as shown in Fig. 5. Depressed Center Wheel CAUTION: . Tighten the wheel nut securely and confirm Wheel that the depressed center wheel does not Washer wobble. 2. Disassembly To remove the depressed center wheel, Wheel simply reverse the above-mentioned Guard procedure. Spindle Push Button Fig. 5 English MAINTENANCE AND INSPECTION WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle during maintenance and inspection. Using cracked, deformed or damaged wheels can lead to wheel breakage and resulting serious injury. 1. Replacing the depressed center wheel Replace the depressed center wheel when it has been worn out to about 2-3/8" (60mm) in external diameter. Confirm that there is no crack or any damage to the depressed center wheel. If there is a crack or a transformation in the wheel, replace it immediately. 2. Inspecting the screws Regularly inspect all screws and ensure that they are fully tightened. Should any of the screws be loosened, retighten them immediately. WARNING: Using this grinder with loosened screws is...
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