They look a little like the striped pole in front of a high-tech barber shop, but spiral bits do more than take a little off the top. Use them wherever you'd use a straight bit -- and get cleaner cuts.
Spiral-fluted router bits leave the edges of your cuts virtually fray-free because, as they turn, the two corkscrew-shaped cutting edges stay in contact with your workpiece longer than the vertical cutting edges of a straight bit. This results in a shearing action instead of the rapid chop-chop-chop-chop of the traditional double-fluted straight bit.
Unlike most router bits that have a carbide cutter brazed to a steel bit body, spiral bits are solid carbide. Carbide, however, is harder than steel, but also more brittle, so you must work with more care than with non-carbide bits. Don't force the work, and avoid sudden plunges or starts.
Let's take a look at the three kinds of spiral bits, and how to choose the right bit for the task at hand.
Add your comment
Please confirm your comment by answering the question below and clicking "Submit Comment."