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Forum: Cutting various materials - bit selection, feeds, speeds

Sun 21 March 2010, 14:21

Replies: 24

Up Spiral Bits

Views: 28,110

Posted By rayditutto

Normand, you are quite right :) sometimes i...

Normand,
you are quite right :)
sometimes i forget there is a bigger picture to look at :o
(and always trade offs)

i've learned to keep my depth of cut <= to the bit diameter which seems to...

Forum: Cutting various materials - bit selection, feeds, speeds

Sat 20 March 2010, 01:05

Replies: 24

Up Spiral Bits

Views: 28,110

Posted By rayditutto

Yes, a straight bit should have less (but...

Yes, a straight bit should have less (but possibly some) tear out

The cutting force is in the direction that the cutting edge is moving

Imagine cutting a slice of bread from the bottom up :eek:...

Forum: Cutting various materials - bit selection, feeds, speeds

Fri 19 March 2010, 15:06

Replies: 24

Up Spiral Bits

Views: 28,110

Posted By rayditutto

That looks like tear out . . . which would be...

That looks like tear out . . . which would be explained by the spiral upcut bit pictured . . . as the cutting edge is leaving the wood it will tend to tear

a spiral downcut will cut in to the...

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