Quote Originally Posted by MrWiz73 View Post
have also tried slowing right down and speeding up to try and get round this
Erm, if I'm interpreting what appears to be an oxymoron correctly you tried increasing the spindle speed and reducing the feed rate, or vice versa? For MDF you want quite a high chipload, so a relatively low spindle speed with a high feerate. The swarf should look like chips not dust. If it's dust the cutter will not last long at all.