thought I would post this before I give them a phone..... Need to cut some gears, not done this before so it may be something I'm doing, the cutters are 48dp N06. N03. The material I'm using is EN16. The second the cutter touched the metal all the teeth striped. I thought it may be the material being to hard?? so I used the other cutter on some Ali. this went well. I then machined up some blanks in mild steel. this time it managed to cut a few teeth before the sparks began to fly. Another cutter gone. As this cutter was half a mil out of true there was 3 teeth left on it. I ground off what was left of the others. slowed the feed down and tried again. same thing. cutter.... 400rpm. feed 20-30mm/min, I'm now thinking my cutter speed is to high. But I'm up to 50 quid in cutters at the mo and I have another cutter on its way to replace the first one. don't really want to spend more on cutters..... and I need to replace the cutter that died today.