First make sure that the floating tap holder does infact float both directions I had this experince early on with my CNC and found that the holder would compress but it would not strech and make sure that the feed is spot on I was instructed to program a slightly slower feed rate so the holder get's longer on the way in and shortens up as the spindle slows to reverse that fine of thread and the material I wouldent be in a hurry unless you have a lot of holes per part If you have room drill deeper than needed and make sure the chip's are out of the hole . Shorten the tip of the tap to make room for the chips and try WD40 or a stronger mix of coolint spirel tap's that small look like there wating to break Good luck Kevin |