Just wondering what you should use to cut straight through an MDF board... What i'm intending on doing is cutting through a 9mm board, then using a bevel bit at around 45 degrees to get the finishing edge. I'm cutting through the board so i can have inlay mirrors in a wardrobe door. Do i use a straight through bit, or can somebody point me in the right direction where i could purchase the bit i need?

If your going to bevel the top edge after, just use an upcut spiral bit. For fastest cutting, use a chipbreaker upcut spiral. Chipbreakers are much quieter too. Keep in mind that the top edge may be a bit fuzzy, but it won't matter if you'll be beveling it after. These are the bits that I use.
http://www.vortextool.com/standard/productDetail.cfm?groupID=266

If you need both top and bottom edges clean and sharp, then use compression spirals like these. http://www.vortextool.com/standard/productDetail.cfm?groupID=272

Cheers, i just ordered a 3 flute compression spiral bit and a 90 degree chamfer. thanks for that :)

Ramon

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