Assessments - 2, GPA: 3.5
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WARNING: Damaged cord must be replaced or repaired. 4. Check the receptacle If the receptacle only loosely accepts the plug, the receptacle must be repaired. Contact a licensed electrician to make appropriate repairs. If such a fautly receptacle is used, it may cause overheating, resulting in a serious hazard. 5. Check your work environment Ensure the following before operation; . No flammable gas, liquid, or object at worksite. . When grinding thin steel sheet it may cause a high booming noise. To avoid such noise, place a rubber mat under the workpiece. . Clear the area of children or unauthorized personnel. English 6. Mounting the wheel guard Be sure to mount the wheel guard at an angle that will protect the operator’s body from injury by a broken wheel piece. [Installing Wheel Guard] . Slightly loosen the screw on the wheel guard. . Install the wheel-guard-locating pin in line with the across flats of the packing gland, turn it to the angle suitable for operation, and make adjustment. . After the adjustment, ensure that the screw is securely tightened on the wheel guard in order to fix it completely. WARNING: If the wheel guard is not attached properly, a broken wheel may result in and cause death or serious injury. 7. Thoroughly check that the depressed center wheel is free of cracks, splits and other Fig. 2 abnomalities before mounting. Make sure it is firmly clamped and has been properly mounted. Refer to page 13 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 13300 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) Wheel Guard Locating Pin Across Flats Packing Gland English GRINDER OPERATION Switch 1. Hold the grinder firmly by its housing 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 slide the switch to the “on” position. 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. 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. ON OFF Fig. 3 15°~30° AB Fig. 4 NOTE: The wheel provided (resinoid wheel) is rated as Class A grain and # 36 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. 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. English 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 one Wrench hand, lock the spindle by turning the Wheel Nut depressed center wheel slowly with the other Tighten hand. Depressed Center Tighten the wheel nut by using...