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18 
Kapex KS120 Miter Saw 
Miter Cuts 
Miter cuts are used when a board needs to be cut at an 
angle across its width. The most common application for a 
miter cut is for joining two boards to form a corner without 
endgrain showing. The miter angle is one-half of the 
corner angle. So for a 90° corner, for example, the miter 
angle is 45°.  
Miter Angles for Polygons 
Number of sides  Corner Angle Miter Angle 
3 – Triangle 
120 60 
4 – Square 
90 45 
5 – Pentagon 
72 36 
6 – Hexagon 
60 30 
7 – Heptagon 
51.4 25.7 
8 – Octagon 
45 22.5 
For even the most experienced woodworkers, cutting 
accurate and tight fitting miters can be problematic. The 
following are some tips for making accurate miters. 
► 
Clamp the workpiece down. Because the sawblade is 
cutting at an angle with the workpiece edge and fence, it 
will tend to move the workpiece sideways, in the 
direction of the cut, as the cut progresses. This can 
result in a cut that is not straight, or the angle of the cut 
may be off. 
► 
Cut slowly. Cutting too rapidly can cause the sawblade to 
deflect as it encounters varying densities in the 
woodgrain. 
► 
Use a chop-cut only for narrow miters. When in doubt, 
use a push-cut. 
► 
When marking the length of the workpiece, use a sharp 
pencil to draw a thin line. The thicker the line, the more 
difficult it will be to cut accurately on the line. 
► 
When marking a workpiece length to match a wall or 
other structure, use a utility knife to mark the cut with a 
small nick. This is more accurate than a pencil line. 
 
► 
If a utility knife is used to mark the cut, you can use a 
method called “Sneaking up on the cut.” This is where 
you make an initial cut longer than needed, and 
continually make very small re-cuts until the cut line 
splits through the center of the nick you made with the 
utility knife. 
Bevel Cuts 
Bevel cuts are used when a board needs to be cut at 
an angle across its thickness. The most common 
application for a bevel cut is for constructing a box or 
similar structure. 
 
The following are tips for making accurate bevel cuts: 
► 
Clamp the workpiece down. If the workpiece is not 
held firmly, the blade will tend to pull the workpiece 
into the cut and up the blade. 
► 
For best results, use only a push-cut. 
► 
Take care not to deflect the saw head sideways. 
Because the saw head is tilted to the side, it can be 
easy to inadvertently push the saw head down or pull it up 
as you feed the saw into the cut. This will result in a crooked 
cut. 
► 
Place the workpiece on the saw with the best-side down. 
Because of the angle of the blade teeth exiting the workpiece 
on the top side of the cut, there will be slightly more tearout 
on the top, especially on the sharper edge.