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Re: CNC Aluminum: Recommended Speeds/Bits?
Quote:
Originally Posted by Bruceb
Why do you use both up spiral and straight bits?
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Spiral bits are used for extracting chips from the cutting area. This is great for contouring holes, slots, pockets, and other features where chips tend to build up.
Straight bits, also called edging bits, won't extra chips as efficiently (or at all) but they also won't lift up on the part they're cutting. This makes them useful for trimming the edges of parts as there is plenty of room for the chips to go and they don't lift up on the part's edge, potentially causing chatter.
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