Fig 25
Tooth Shape:
The tooth shape affects the chip capacity and the feed rate.
The following table shows common tooth shapes (Fig 26):
Fig 26
A- Regular tooth:
The most common used tooth shape. 0° rake angle.
Suited for cut-off and contour sawing of most materials. For
cutting materials where a fine cut is required.
B- Skip tooth:
Widely spaced teeth, to prevent clogging. 0°rake angle.
For resawing and ripping thick stock, especially soft woods.
C- Hooked tooth:
Large teeth and a positive rake angle, for aggressive, faster
cutting.
For resawing and ripping thick stock, especially hard woods.
D- Variable tooth:
Variable tooth shape and spacing produces smooth cuts and
dampens vibrations.
Set:
Saw teeth are bent out of the plane of the saw body, resulting
in a wide cut in the workpiece.
This helps reduce friction and allows curved cuts.
The alternate set (Y, Fig 27) is the most used for woodworking
blades.
Fig 27
X- Raker set
Y- Alternate set
Z- Wavy set
Blade width:
Use a wide blade, except for contour cutting.
The following table shows relation between saw blade width
and smallest cutting radius (Fig 28).
Fig 28
Blade material:
- carbon steel
- alloy steel
- bimetal (HSS teeth welded onto alloy steel blade body)
-carbide tipped.
7.2 Changing the sawblade
Check sawblade for flaws (cracks, broken teeth, bending)
before installation. Do not use faulty sawblades.
The sawblade teeth must point in cutting direction (down)
Always wear suitable gloves when handling sawblades.
To remove the blade:
Open the wheel covers.
Remove the table insert (D, Fig 29) and the slot handle
assembly (E).
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