Thanks guys... the problem is that I still had the same problem today even when I didn't use tru stone... I used amboyna burl. I think it is from too much pressure that I place on it through the quill. The only reason that I have to put that much pressure is so that the spikes on the steb will go into the wood. Would taking a mallet and hitting it into the steb work? Or is there something that I'm missing here.
Jonathan
Are you using a Sorby type steb center, or the one that came with your lathe? The one that came with your lathe likely has four blades and these are quite nasty on some materials.
I use this PSI multi tooth unit, and have pretty good luck not chipping blanks:
http://www.pennstateind.com/store/LCENTSS21.html
You may need to drill the little hole as some have suggested, that can help keep the point from splitting in.
Also, as you start, apply moderate pressure with the tailstock, and as you turn, retighten the tailstock occasionally. The centers will sink in at their own rate a bit easier. Pounding with a hammer does not sound good.:biggrin:
The spikes or blades seem to sink in easier if the lathe is running and you turn some on the blank a bit, for me anyway. Just retighten as needed.
Ease it in, don't muscle too much and I think your problems will fade.