What you maybe missing is a good router bit,,, they are not all the same, that said MDF can play hell with router bits...once the bit gets hot that's it,,
it's done and will load up the router and stop cutting...
You didn't say what brand of bit you are using... the router bit has a VERY small edge that does the cutting and heat can make it into a boot anchor in one pass..
Not all MDF is the same, the clean white is best the light brown is hell on bits...
You can try this ,make a 1/8" deep pass to get that sharp edge and then drop in down to 1/4" and make one more pass....but listen to the router it will tell you what you are doing or need to do,,,,a nice hummmmm is best ,it's like welding, the egg sound cooking on a hot plate is best just like a router has a voice so to speak..
Originally Posted by Lokheed
So, if I'm working on a project like this where I need to ultimately make twenty separate passes of over seven feet each (five cases, four tracks per case) in MDF, what can I do to preserve the bit? I can't imagine it is reasonable to plan on buying ten router bits to go through... is MDF just a really bad material to be using a router on?