Aug 15,  · Spiral Bits Leave a Clean Edge The three basic Up Down Spiral Router Bits Youtube cutter configurations for spiral bits are up-cut, down-cut, and a combination of the two, known as a compression bit. A down-cut bit sends the chips downward; an up-cut bit sends them up to ward the shank. (On a 5/5. Apr 08,  · You use a down spiral when surface finish is important and chip clearance isn't an issue (such as for shallow cuts or when inverted in a table). The up spiral is definitely superior for chip clearance and for plunge cutting but will splinter delicate material like veneered plywood. Jun 05,  · Ethan talks about the differences between up spiral, down spiral, single flute and two flute router bits. He goes when, where and what to expect using these.
Jun 05,  · Ethan talks about the differences between up spiral, down spiral, single flute and two flute router bits. He goes when, where and what to expect using these. Aug 15,  · Spiral Bits Leave a Clean Edge The three basic cutter configurations for spiral bits are up-cut, down-cut, and a combination of the two, known as a compression bit. A down-cut bit sends the chips downward; an up-cut bit sends them up to ward the shank. (On a 5/5. May 16,  · For example, one Internet source sells a 1⁄2 x1 1⁄4 " straight bit for $18, but an up-cut spiral bit the same size costs $ A 1⁄2 x1 1⁄2 " bottom-bearing straight flush-trim bit costs $21 versus $ for a comparable down-cut flush-trim bit. In addition to their lower price, straight bits work best on wide cuts.

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