Types of Router Bits:
There are five basic types of router bits: straight,
up shear, down shear, combination [also called
compression], and form tools [round over, ogee, etc.].
1.
Straight Router Bits
These are the standard router bits that are commonly
used with handheld routers and are readily available at
home centers.
2.
Up Shear Router Bits
These bits have flutes that are spiraled upward [a standard twist drill is an
example of this type of bit]. This bit design removes the chips from the kerf but
has a tendency to chip the top surface, especially veneers or melamine surfaces.
Ball Nose Router Bits
are a variation of the up shear bit design but have a
radiuses end. These bits are typically used for 3D surfacing applications.
3.
Down Shear Router Bits
These bits are similar to the up shear but with an opposite spiral that actually
tends to pack the chips into the kerf. These bits prevent chipping the material
surface, especially with veneers or melamine surfaces.
4.
Combination [Compression] Router Bits
These bits combine the advantages of both up shear and down shear designs.
The top section of the tool is down shear to prevent chipping the top surface of
the material and the lower part of the bit is up shear to prevent chipping the
bottom surface of the material.
Combination Router Bits
are the preferred configuration for machining veneered
plywood as well as melamine surfaced product. A variation of the bit is called the
“Mortising Compression” router bit. With this bit, the up shear portion of the bit is
less than ¼” in length so that the bit can be used on ¼” veneered plywood and
for dados.
5.
Form Router Bits
Form Router Bits typically are available in standard profiles such as round over,
ogee, etc. Router bits that
Router bits
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