Heat
BLADE ANNEALING
•After the blade has been welded, the weld area will be very hard and brittle. Before the blade can be used, it must be annealed and the flash removed.
•The blade weld is annealed by heating the blade just under the melting temperature and then slowly cooling the weld.
NOTE: Reset weld pressure adjustment knob to "0"
prior to annealing. Failure to do so can cause damage to transformer.
•Press the anneal button until the weld area glows a cherry red and then release the anneal button.
CAUTION: The blade weld will melt, destroying the weld, if the anneal button is not released as soon as the weld glows cherry red.
•Let the blade cool for several seconds.
•Press the anneal button again, but release the but-
ton before the weld glows as brightly as the first time.
•Wait several seconds until the blade cools further.
•Repeat the anneal process 6 or 7 times, decreasing the anneal temperature each time.
•The weld flash must be ground from the blade. See "Grinding Blade".
GRINDING BLADE
•After annealing the blade, the metal buildup or flash must be ground from the blade.
•Toggle grinder switch to the ON position.
•Flip the grinder guard open, exposing the top of the grinding wheel.
•Weld should be ground to same thickness as blade.
•Grind flash off underside of blade taking care not to grind into blade.
•Turn blade inside out and grind other side of blade same as first side (or, flip the grinder guard to the closed position and use the bottom of the wheel).
•Take care not to grind into blade.
•Turn blade inside out again (to original shape).
•Turn grinder off when grinding is completed. The blade must be annealed again.
ANNEAL BLADE AFTER GRINDING
•After flash has been removed, anneal the blade a second time. The weld may have been hardened by heat created during grinding. Repeat "Blade Annealing" step.
•After second blade annealing operation, the blade is ready for installation onto band saw. Follow band saw instruction when installing and adjusting blade.
WARNING: Make certain that unit is disconnected from power source before attempting to service or remove any component.
CLEANING
Refer to Figure 15.
•Keep machine and workshop clean. Do not allow sawdust to accumulate on band saw.
•Keep wheels clean. Debris on wheels will cause poor tracking and blade slippage.
•Keep mechanisms and threaded or sliding surfaces clean and free of foreign particles.
•Operate band saw with a dust collector to minimize clean up.
•Make sure that brush (Key No. 63) is in contact with
blade to properly remove foreign particles from drive wheel.
LUBRICATION
Refer to Figures
•The shielded ball bearings are permanently lubricat- ed and require no further lubrication.
•Grease guide post (Figure 16, Key No. 36) once a week. Grease speed operator shaft in gearbox hous- ing (Figure 15, Key No. 28 and 45) and blade tension lead screw (Figure 15, Key No. 16) every 100 hours. Use grease gun on grease fitting every 100 hours (Figure 17, Key No. 10). Grease table support brackets every three months.
•Add light machine oil or air tool oil to air pump (Figure 17, Key No. 49) when pump loses power or fails to pump air.
•Occasionally apply a coat of paste wax to table top to keep it slick and corrosion free.
KEEP BAND SAW IN REPAIR
•If power cord is worn or cut in any way, have it replaced.
•Replace
•Use parts list to order parts.
CLEAN WELDER JAWS
After each welding operation, wipe welder jaws clean of any oil, dirt or rust and scrape any flash deposited on welder jaws.
Welder jaws must be kept clean at all times. The jaws must be wiped clean of any dirt or oil and scraped clean of flash after each weld.
The shear blades should be wiped with an oily cloth to remove any dirt or rust.
To replace grinding wheel, remove two screws holding grinder guard and remove guard. Hold grinding wheel stationary and remove nut and washer. Install new wheel on grinder motor shaft and fasten with washer and nut.
Make sure nut is tight. Attach grinder guard with two screws.
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