You need to use 3 8 inch wide cut.
Router bit for aluminum.
Bottom pilot bits trim material from an upper layer of the workpiece so that it is flush with the layer below.
Router cutters are available in a range of shank sizes through.
In addition to flush trimming they can be used to cut along a template placed below the workpiece.
The ideal router bits to work on aluminum are straight bits and carbide tipped.
Aluminum spiral solid carbide router bits by amana tool feature outstanding longevity a tendency to stay sharper mirror like carbide finish excellent carbide brazing a broad selection of sizes and most importantly quality of cut.
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You will find the router very efficient when cutting corners and tight curves.
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Use spiral flute solid carbide bits on aluminum.
Do not use smaller bits since they tend to get hot and soon aluminum shavings clog up their blades then ultimately stop cutting.