here is an mpc of a stake cutout i had help from oustanding members on here. i cut this out today, i use a sled that holds the board in center of sled, used this sled multiple times so sled is not issue. the cutout was max depth of .300, so it would take three cuts to cutout.
everything was fine while making first two cuts, then i heard an awful racket , ran back in to find that the third cut i had seen sparks flying and then the bit had broke. stopped machine and pulled sled out the part was already cut out of the sled and the 3rd cut had just started and was cutting into the round bar between rollers that the guide slides on, .
what could have caused this and check out my mpc to see if that was the problem. the sled is .75 thicknes and the wood in sled was .75, i have used this many times , this is a first for me
thanks Steve