spiral or ramp it in, I have been getting the real cheap ones from banggood and had good results and about £1-3 each depending on size
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spiral or ramp it in, I have been getting the real cheap ones from banggood and had good results and about £1-3 each depending on size
carbide
Plunging can leave marks on the edge, ramping into the cut is a far better method.
Measure the thickness of the MDF, if it's more than nominal then it likely has moisture content and that can make it fluffy.
ONLY if it's dry, a coat of spirit sanding sealer helps to keep it dry and also penetrates and consolidates the surface making for a crisper edge.
Solid carbide up-cut double flutes spiral router bits are also a good choice for MDF cutting. Two large grooves can easily remove chips and keep bits in balance during rotation. They are also high temperature resistant, and tungsten solid carbide can guarantee a long use life.
If you get it in small quantities, there is a material called Valchromat which is vastly superior to MDF, and it machines beautifully. It is also coloured and great for furniture building. I'm in the process of using it to make a clock case now.