I use a Haas SL30 at work with sandvik parting off tools and tips, and rarely run them at such high speeds, I guess these speed are for perfect conditions, maximum rigidity, tool as close to the chuck as possible, tool dead on centre etc.
I would suggest running the parting off operation at 800-1200rpm with a feed of 0.05mm/rev.
Feed down to a few mm of them breaking off then drop the speed down to 300rpm to cut them off, this will avoid the tool flinging them off causing dents.