Shop fox W1749, Руководство пользователя

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W1749 9" Bandsaw
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Figure 49.
Raker, skip and hook tooth
styles.
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 49 shows the three main categories of tooth style:
• 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 gener-
ate 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 gener-
ate more heat. However, these blades also leave a
rougher cut than raker blades.
•
Hook:
The teeth on this style have a positive 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 subject-
ed 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 mate-
rial with much more resistance than clean blades. This
extra resistance also causes unnecessary heat.
Raker
Skip
Hook