Hello,

I purchased a set of the standard bits that Taig sells with their mills. I am using them to cut parts out of 1/4" ABS. I have noticed that after cutting about 4 3"x5" peices that the bits become dull. I assume they are dull because when new I could see very small chips and now the plastic loads up and begins to melt resulting in a very bad cut. When new the cuts are perfect.

My question is, is this wear normal for ABS cutting? I am using the 3/16" endmill that has 2 ends. I also assume that these bits are high speed steel and this is the cause of my wear. Can anyone recommend a bit that will last?