12
Kongsberg XL
Milling bit
edges are brittle.
Never let bits touch each other, or other hard
surfaces.
Always store in proper container.
Acrylic or Multi Purpose bits
1. Acrylic Bits
(A) are polished, extra sharp
for acrylic, wood etc.
2. Multi Purpose Bits
(MP) have a higher
wear resistance, and are suitable for
aluface, plastics, MDF, plywood, wood etc.
Multi Purpose Bits
can be identified by a
small tooth at the tip (left hand bit on the
picture).
Feed rates
One-flute Bits
do have a good chip flow, and
allow for large feed rates. 0.1-0.2 mm/tooth
(0.004-0.008 in/tooth) can be a starting point
for optimization in most materials:
This gives a feed rate of of 4-8 m/min (2.6-5.2
ips) at 40.000 RPM, and 6-12 m/min (3.9-7.9
ips) at 60.000 RPM.
Light materials, like PVC foam can be run
much faster.
The surface finish or the
Power Consumption
will normally determine the final
Feed Rate
for an application.
A large drop in RPM, or a high %Watt value in
the display, indicate too high
Feed Rate
.
Large diameter bits require more power than
small diameter bits.
Worn bits increase the
Power Consumption
.
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