3. Tools
The circular saw blades are the tools of the circular sawing
machine. These saw blades are circular-shaped steel disks with spikes which may
be differently shaped.
Figure 5 Teeth shapes of
circular saw blades 1 acute-angled tooth (normal tooth), 2 gullet tooth, 3
tooth with hard metal tips
These saw blades are suitable for the following applications
given normal strain in hand feed operation:
- saw blade with sharp-angled tooth (normal tooth):
oblong and cross cuts of hard wood, soft wood and sheet material
- saw blade with gullet tooth: oblong cuts of hard wood, moist
and dry soft wood
- saw blade with hard metal tool tips: oblong and cross cuts of
hard and compact wood varieties, chip- and fibreboards, plastic
materials
Circular saw blades with sharp and gullet teeth are usually saw
set whereby the teeth may be bent to the right or left (setting width of 0.3 to
1.0 mm).
In the case of circular saw blades with hard metal tool tips the
cutting tip of the cutting edge is wider than the backing material of the saw
blade.
In order to prevent the saw blades from jamming in the kerf and
to avoid frictional saw blade heating, the saw blades must cut "freely".
Figure 6 Free cut of saw
blades 1 setting of normal teeth, 2 relief grinding for hard metal cutting
tips
The following hints are to be taken into consideration:
Check condition of circular saw blade before using!
Do not use cracked, deformed, wobbling and unbalanced saw
blades!
Do not exceed the top speed indicated on the saw blades!
Blunt and resined saw blades must be replaced.
In the case of reground hard metal tipped circular saw blades
the cutting tip thickness must be at least 2 mm.
Hard metal tipped saw blades with successively impaired cutters
or cutters more than 10 per cent worn shall no longer be
used.
Which saw blades are used for cutting hard wood, soft
wood and sheet
material?
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How can unimpeded cutting of various circular saw blades be
guaranteed?
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