Steel City 50155C, Руководство пользователя

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23
BLADE SELECTION
Using the proper saw blade for the job you are perform-
ing will optimize the efficiency of your bandsaw and
increase the quality of your work. There are some
basic questions that apply when determining which
type of blade to use.
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What type of material is to be cut?
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How thick is the workpiece?
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What features does the workpiece contain, i.e. bends,
curves, etc.?
These questions will help you with determining which
type of blade to use. The type of blade is determined
by 5 features. They are:
1. Blade width
2. Pitch
3. Tooth shape
4. Set
5. Blade material
BLADE WIDTH
Blades for the bandsaw are available in different stan-
dard widths. This width is measured from the rear of
the blade to the tip of the tooth. In general, a wider
blade is used for ripping and generally straight line
cuts. The narrower blades are mainly used for cutting
a workpiece with curves and bends.
PITCH
The unit of measure for pitch is teeth per inch. A fine
pitch, meaning having more teeth per inch, will deliver
a smoother cut, but will take a longer time to complete.
A coarse pitch, meaning having fewer teeth per inch,
will cut much faster, but leave a rougher finish. A good
rule of thumb is the thicker the workpiece, the coarser
the pitch should be.
TOOTH SHAPE
Tooth shapes come in several basic types. Three of
them are hook, skip, and variable. Skip and hook types
are used to help obtain a higher feed rate when cutting
thick workpieces, while variable combines the features
of two types of blades.
SET
The term “set” refers to the way that the saw teeth are
bent or positioned. Set patterns are selected depend-
ing on the type of material being cut.
BLADE MATERIAL
Bandsaw blades can be made from different types of
materials. Some common materials are carbon steel,
spring steel, and high speed steel.
BLADE DRIFT
Blade drift occurs when the blade begins to wander off
the cutting line. It can be caused by several factors.
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Incorrect Blade Tension
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Wrong Blade Type
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Dull Blade
If you experience blade drift, check the appropriate
adjustments first. If this does not correct the problem,
the blade may have to be replaced. See BLADE
REPLACEMENT in the MAINTENANCE section of this
manual for more information.