Hopz, before you opt for a screw-type splitter, consider the alternatives. I've used several types and all will do the job. i bought an electric splitter last year and couldn't be happier. It's small, portable, and powerful. Do a search for "electric log splitter" and you'll find several models ranging in price from $120 and up. After looking closely, I'm convinced they're all made in the same plant, just painted a different color or with different names. So why the differences in price????????
After looking at some Youtube videos, I think they can all split wood larger than their specifications call for. Here are some links:
All this wood is oak, much tougher than pine.