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Resumen del manual
Determine the smallest radius curve that will be cut on your workpiece and use the corresponding blade width. .................... . ........................... Figure 50. Blade width radii. • Straight Cutting: Use the largest width blade that you own. Narrow blades can cut tight curves (a small radius) but are not very good at cutting straight lines because they naturally wander (blade lead). However, larger blades are much better at cutting straight lines, but function poorly at cutting small curves because of their size. Tooth Style When selecting blades, another option to consider is the shape, gullet size, teeth set and teeth angle—otherwise known as “Tooth Style." Figure 51 shows the three main categories of tooth style: Raker Skip Hook Figure 51.Raker, Skip & Hook tooth styles. • Raker: This style is considered to be the standard because the tooth size and shape are the same as the tooth gullet. The teeth on Raker blades usually are very numerous, have no angle, and produce cuts by scraping the material; these characteristics result in very smooth cuts, but do not cut fast and generate more heat while cutting. • Skip: This style is similar to a raker blade that is missing every other tooth. Because of the design, skip toothed blades have a much larger gullet than raker blades, and therefore, cut faster and generate more heat. However, these blades also leave a rougher cut than raker blades. -40 G0513X/G0514X/G0514X3 Extreme Series Bandsaw • Hook: The teeth on this style have a posi-The most common causes of blade breakage tive angle (downward) which makes them dig into the material, and the gullets are usually rounded for easier waste removal. These blades are excellent for the tough demands of resawing and ripping thick material. Tooth Pitch Usually measured as TPI (teeth per inch), tooth pitch determines the size of the teeth. More teeth per inch (fine pitch) will cut slower, but smoother; while fewer teeth per inch (coarse pitch) will cut rougher, but faster. As a general rule, choose blades that will have at least three teeth in the material at all times. Use fine pitched blades on harder woods and coarse pitched blades on softer woods. Blade Care A bandsaw blade is a delicate piece of steel that is subjected to tremendous strain. You can obtain longer use from a bandsaw blade if you give it fair treatment and always use the appropriate feed rate for your operation. Be sure to select blades with the proper width, style, and pitch for each application. The wrong choice of blades will often produce unnecessary heat which will shorten the life of your blade. A clean blade will perform much better than a dirty blade. Dirty or gummed up blades pass through the cutting material with much more resistance than clean blades. This extra resistance also causes unnecessary heat. Blade Breakage Many conditions may cause a bandsaw blade to break. Blade breakage is unavoidable, in some cases, since it is the natural result of the peculiar stresses that bandsaw blades are subjected to. Blade breakage is also due to avoidable circumstances. Avoidable breakage is most often the result of poor care or judgement on the part of the operator when mounting or adjusting the blade or support guides. are: • Faulty alignment and adjustment of the guides. • Forcing or twisting a wide blade around a curve of short radius. • Feeding the workpiece into the blade too fast. • Tooth dullness or absence of sufficient set. • Incorrect tension. • Top blade guide assembly set too high above the workpiece. • Using a blade with a lumpy or improperly finished braze or weld. • Continuously running the bandsaw when not in use. -41 G0513X/G0514X/G0514X3 Extreme Series Bandsaw Blade Changes Always disconnect power tothemachinewhen changing blades. Failure to do this may result in serious personal injury. All saw blades are dan- gerous and may cause personal injury. To reduce the risk of being injured, wear leather gloves when handling saw blades. To remove a blade: 1. DISCONNECT BANDSAW FROM POWER! 2. Release the blade tension by turning the blade tension quick release lever to the left. 3. Remove the table insert and the table pin. Adjust the upper and lower guide bearings as far away as possible from the blade. 4. Open the upper and lower wheel covers, and with gloved hands, slide the blade off of both wheels. 5. Rotate the blade 90. and slide it through the slot in the table. To replace a blade: 1. Slide the blade through the table slot, ensuring that the teeth are pointing down toward the table. Note: If the teeth will not point downward in any orientation, the blade is inside-out. Put on heavy gloves, remove the blade, and twist it right side-out. 2. Slip the blade through the guides, and mount it on the upper and lower wheels (Figure 52). Figure 52. Placing blade on the wheels. 3. Tighten the blade tension lever. 4. Apply tension to the blade by turning the tension control knob. Rotate the upper wheel slowly by hand as tension is appl...
Otros modelos de este manual:Jig Saw y - G0513X (10.89 mb)
Jig Saw y - G0514X (10.89 mb)