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Manafacture: Jet Tools
File size: 1.39 mb
File name: a00ad6d4-e534-3584-c1b7-a4194f6e4c77.pdf
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manual abstract
A. A temporary adapter (Fig. B) may be used to connect the plug to a two- prong receptacle (Fig. B) if a properly grounded outlet is not available. A temporary adapter should only be used until a properly grounded outlet can be installed by a qualified electrician. This adapter is not applicable in Canada. The green colored lug must be fastened to the cover plate screw. Important: The adapter illustrated in Fig. B is for use only if you already have a properly grounded two-prong receptacle. Do not modify the plug provided-if it will not fit the outlet, have the proper outlet installed by a qualified electrician. Check with a qualified electrician or service personnel if the grounding instructions are not completely understood, or if in doubt as to whether the tool is properly grounded. Before plugging into the power source, be sure that power switch is in the OFF position. Extension Cords Use only three-wire extension cords that have three-prong grounding type plugs and three- prong receptacles that accept the tool's plug. Replace or repair damaged or worn core immediately. USE PROPER EXTENSION CORD. Make sure your extension cord is good condition. 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. Amp RatingVolts Total length of cord in feet 120V 240V 25 50 50 100 100 200 150 300 AWG 0 – 6 6 – 10 10 – 12 12 – 16 18 18 16 14 16 16 16 12 16 14 14 not rcmd 14 12 12 not rcmd Table 1 10 Operation A bench grinder is designed for hand-grinding operations such as sharpening chisels, screwdrivers, drill bits, removing excess metal, and smoothing metal surfaces. A Medium Grain Abrasive Grinding Wheel is suitable for rough grinding where a considerable amount of metal must be removed or when obtaining a smooth finish is not important. A Fine Grain Abrasive Grinding Wheel should be used for sharpening tools of grinding to close size tolerances because it removes metal more gradually for precision grinding and gives work a smooth finish. Always use approved safety glasses or face shields! Failure to comply may cause serious injury! Switch The switch is located on the front of the grinder near the bottom. To turn the tool on, depress the rocker switch at the top near the word ON. To turn the tool off, depress the bottom part of the rocker switch near the word OFF. Precautions Before starting the grinder, turn the wheels by hand making sure they are clear of obstructions and that they turn freely. The tool rests and spark guards should not touch the wheel. Turn on the grinder and allow it to reach full running speed before starting to grind. Keep a steady, moderate pressure on the workpiece and keep it moving at an even pace for smooth grinding. Pressing too hard overheats the motor and prematurely wears down the grinding wheels. Note the original bevel angle on the item to be sharpened and try to maintain the same shape. The grinding wheel should rotate into the object being sharpened. Keep a tray filled with water and dip your work into in regularly to prevent overheating. Overheating can weaken metals. Do not use the side of the grinding wheel; this puts dangerous stress on the wheel. When the wheel becomes loaded of dull, use an approved grinding wheel dresser and dress the wheel face. Keep the tool rest and spark guard to within 1/16" of the grinding wheel. See the Adjustment section to adjust. Adjustments Eye Shield Tilt Adjustment 1. Loosen lock knob (A1, Fig. 3). 2. Adjust eye shield to the desired tilt angle (A2, Fig. 3). Spark Guard As the wheel wears down, the spark guards must be re-adjusted to maintain a 1/16" distance. To adjust: 1. Loosen two hex cap screws (B1, Fig. 3) with a 10mm wrench. 2. Slide the spark guard (B2, Fig. 3) to 1/16" distance from the grinding wheel surface. 3. Tighten screw (B1, Fig. 3). Figure 3 Tool Rest As the wheel wears down, the tool rests must be re-adjusted to maintain a 1/16" distance. 1. Loosen two hex cap screws (C1, Fig. 3) with a 12mm wrench. 2. Slide the tool rest (C2, Fig. 3) to a distance of 1/16" from the grinding wheel. 3. Tighten screws (C1, Fig. 3). 11 Maintenance For safety, turn the switch to OFF and remove plug from the power source outlet before adjusting and maintaining the bench grinder. If the power cord is worn, cut or damaged in any way, have it replaced immediately. Ring Test Before replacing a grinding wheel, perform this simple test on the replacement wheel: 1. Loop a piece of string through the grinding wheel hole and suspend the wheel by holding up the string. 2. Tap the wheel with a piece of scrap wood or a wooden dowel. A good wheel will "ring"; a defective wheel will "thud". Discard any wheel that does not "ring". An int...