There are several reasons for lots of burning. First was the bit dull? Second if the router bit is spinning too fast for your rate of travel you will get burn marks. Slow the router down or speed up your cranking. Good question on the up cut, I'd be tempted to try a down cut since it would push the shaving into the center and not tear out the edges of the beads. I don't do the hollow spirals so I'm really not the guy to ask.
-Tim ----- Original Message ----- From: Barry To: legacy-ornamental-mills@googlegroups.com Sent: Sunday, September 16, 2012 10:42 AM Subject: Hollow spiral Good day ! l just did my first hollow spiral with 3 starts using a 2" spiral bit from magnate and a freud 1/2 straight bit on a piece of ash . It was a test for me and the only thing wrong with it was the straight bit ,l got a lot of burning on the inside walls . l intend to buy Magnate's 1/2 ' 2-flute straight plunge no. 285b however l wondered if buying the 1/2 " 2-flute right hand up -cut spiral no. 2010 would give me a cleaner cut. l need advise from someone please. Thanks regards Barry -- --
