valutazioni - 3, GPA: 4.3 ( )

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Troubleshooting Deep scratches and circular marks can result from: • Uneven pressure • Using a partially glazed wheel - especially on aluminum applications • Dirt or loose metal on the workpiece • Failure to constantly move across surface Bluish discoloration of metal surface indicates: • Excessive heat caused by circular motion in a small area • Excessive pressure • Use of worn out or glazed wheels Inspecting Wheels Always handle wheels carefully to avoid damage. Before installing any wheel, always inspect it for cracks. If wheel is cracked, discard it to prevent others from using it. page 8 Selecting Wheels 2. If you have just installed a grinding wheel or are just beginning a period of work, test the wheel by letting it spin for one minute before applying it to the workpiece. Only use wheels with Maximum Safe Operating Speed rated at or above the RPM listed on the “WARNING” section of the tool's nameplate. This speed is based on the strength of the wheel, allowing for a reasonable measure of safety. It is not meant to imply a best or most efficient operating speed. Do not exceed the Maximum Safe Operating Speed. WARNING! NOTE: Out-of-balance wheels can mar workpiece, damage the tool, and cause stress to wheel that may cause wheel failure. 3. Firmly grasp rear handle and side handle before starting and while using tool. Allow wheel to come to full speed before starting to grind. 4. When grinding, hold tool at a 5o to 15o angle as shown, using constant pressure for a uniform finish (Fig. 6). Too great an angle causes too much pressure on small areas which may gouge or burn work surface. Grinding is the cutting action of thousands of abrasive grains on the face of a grinding wheel. When grinding metals such as steel and iron, choose an aluminum oxide grinding wheel. Select a silicon carbide grinding wheel for stone and concrete. Use cotton reinforced wheels for non-ferrous metals. Type 27 reinforced 1/8" cut-off wheels are suited for small cut-off and shallow notching operations only. Grinding (Fig. 5 & 6) WARNING! To reduce the risk of injury when grinding: • ALWAYS hold the tool firmly with both hands using the handles provided; before and during grinding • NEVER allow the wheel to bind • NEVER use a wheel that has been dropped • NEVER bang grinding wheel onto work • NEVER grind without proper safety equipment Using Type 27 Cut-Off Wheels (Fig. 7) Fig. 6 Hold at a 5° to 15° angle 5. Control pressure and surface contact between wheel and work- piece. Too much pressure slows cutting speed. A Type 27 guard must be installed when using a Type 27 cutoff wheel to provide maximum protection for the operator if the wheel should break. WARNING! To reduce the risk of injury when grinding, ALWAYS use the proper guard. ALWAYS properly install the guard. WARNING! Type 27 cut-off wheels are only suited for small cut-off and shallow notching operations. 1. Firmly grasp rear handle and side handle before starting and while using tool. Allow wheel to come to full speed before starting. 2. When using a cut-off wheel, hold tool as shown, using only the 1. Depending on your job, position the guard to provide maximum pro- edge of the wheel (Fig. 7). tection for the operator (Fig. 5). Fig. 5 Operator's Zones Fig. 7 3. Control pressure and surface contact between wheel and work- piece. Too much pressure slows cutting speed. page 9 USING WIRE BRUSHES Selecting Wire Brushes Wire brushes are useful for removing rust, scale, burrs, weld slag, etc. A wide variety of wire brushes are available for many applications. Everyone in the area must wear protective clothing and safety goggles or face shields. Fatigued wires and residue will fly off the brush with considerable force, causing the potential for serious injuries. WARNING! Wire wheel brush Fig. 9 Guard Nylon washer Spindle Flange Installing Wire Cup Brushes (Fig. 8) Fig. 8 Wire cup brush Spindle lock button Nylon washer Flange Spindle Spindle lock button 1. Unplug tool and place it upside down on a level surface. Remove any accessories from spindle. NOTE: Never use a guard with a wire cup brush. 2. Thread flange and nylon washer onto spindle. Attach wire cup brush onto spindle. 3. Press in the spindle lock button while tightening brush with a wrench (not provided with tool). 4. To remove wire cup brush, unplug tool and reverse procedure. Installing Wire Wheel Brushes (Fig. 9) Because the wires on wire wheel brushes are directed towards the operator, a Type 27 guard must be used to protect the operator when fatigued wires break. WARNING! 1. Unplug tool and place it upside down on a level surface. Remove any accessories from spindle. 2. Thread flange and nylon washer onto spindle. Attach guard and wire wheel brush onto spindle (see Fig. 4 for attaching guard). Position the guard in the location which offers best control and guard protection. For operating zones that provide maximum protection for the operator, see "Grinding". 3. Press in the spindle lock button while tightening bru...

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